Surge arrester BlitzART for KNX / auxiliary voltage

Buy BlitzART KNX

Your advantages

This BlitzART KNX surge arrester offer you:

  • Standard-compliant: We are KNX manufacturer
  • Ausgereift und Bewährt: Module sind seit fünf Jahren in zigtausenden Anlagen im Einsatz
  • High performance: Two protection levels with five protection and flashover sections
  • Very low protection level: Only 1/4 compared to single stage arrester
  • KNX-TP and auxiliary voltage: Double clamp set included

Field of application

Protect system devices and participants of the KNX bus system

  • KNX power supplies: in each segment, directly at the SV
  • KNX line amplifier: on both sides, in each segment, directly on the LV
  • KNX line coupler: on both sides, in each line, directly on the LK
  • KNX area coupler: on both sides, in each line, directly at the BK
  • KNX bus subscriber: Actuators, glass push-buttons, sensors, each per protection zone
  • KNXnet/IP interface: directly at the interface
  • KNXnet/IP Router: directly at the router


Protect your KNX servers too

  • Timberwolf Server: KNXTP & auxiliary voltage, each directly before the server
  • Timberwolf Server KNX bus coupler: KNXTP, each before bus coupler
  • Loxone Miniserver 1: KNXTP, each directly in front of the server
  • Loxone Miniserver & KNX Extension: KNXTP, in each case directly in front of the extension
  • GIRA X1: KNXTP & auxiliary voltage, per X1, directly before the X1
  • GIRA S1: KNXTP & auxiliary voltage, per S1, directly before S1
  • EibPC: KNXTP & auxiliary voltage, per EibPC, directly in front of the server
  • BabTec EibPortC: KNXTP & auxiliary voltage, directly in front of the server

When combining several such devices in one distribution, we recommend at least TWO protection modules per line or segment. Here, one protection module directly at the power supply, the second at the transition to other protection zones. If further modules are used, the third, fourth module, etc. before the most valuable devices.

Scope of protection

This two-stage surge arrester for information technology systems C2 / type 3 provides excellent protection against overvoltage from near and far lightning strikes as well as against overvoltages from switching operations with the inclusion of lightning current equipotential bonding (three connected conductors).

Protection level (at 1,000 A)

  • Protection level between sw/rt: < 220 V
  • Protection level between sw/PE: < 220 V
  • Protection level between rt/PE: < 370 V


Certification

berspension arresters for information technology systems
Pulse category C2, increased current load
with 1,000 amps (8/20µs), fast rising edge
according to DIN EN IEC 61643-21:2001 + A1:2009 + A2:2013

by impulse and high current laboratory PHOENIX CONTACT, Blomberg
accredited according to DIN EN ISO / IEC 17025:2018
by the German Accreditation Body DAkkS with certificate DAkkS: D-PL-12161-03-00

Technologies

  • Execution: Two-stage surge arrester
  • 1st stage: Three flashover paths via double-chamber gas voltage arresters
  • 2nd stage: Two protection paths via two bidirectional TVS protection diodes
  • Response time: approx. 40 ps (about 1,000 times faster than single-stage arrester)
  • Capacity: approx. 1 nF (corresponds to 10 m bus line)
  • Signal connection: Double terminal set for KNX-TP and auxiliary voltage
  • PE connection: Low impedance and uncut via ring terminal up to 6 mm².

Overvoltage protection for KNX power supply

Protection of KNX power supplies

  • Priority: The KNX power supply is the most important system device of a KNX line (KNX segment). Therefore, you should protect it with its own arresters.

  • Hazard potential: KNX power supplies must always be connected to PE. In the event of a lightning strike, there is a risk of a breakdown through the insulation of the KNX power supply due to potential rise.

  • Protective measures: The best protection consists in the fast equalization of potential differences, if possible directly at the terminals.

Recommendations

  • Arrangement protection modules: Protect your KNX power supplies with two BlitzART KNX protection modules directly parallel to the connections (each for KNX-TP and KNX auxiliary voltage). Position modules directly next to the power supply and route KNX bus and auxiliary voltage via the protection modules.

  • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block where the PE for the KNX power supply is connected (same or better impedance for the BlitzART modules compared to the KNX power supply).
Buy BlitzART KNX

Lightning protection for IP router or IP interface

Protection of the KNX IP router / IP interfaces

  • Priority: KNX IP routers work as KNX line or area couplers, where the LAN interface (Ethernet) is used as KNX backbone. Such an IP router is an important system device for connecting lines or areas via LAN. A failure would disconnect a line or area from the KNXnet/IP backbone. After the KNX power supply of the respective lines or segments, IP routers are the second most important system devices of a KNX installation and should be protected with own surge arresters. KNX IP interfaces are system devices similar to IP routers, which allow KNXnet/IP tunneling clients (e.g. ETS, visualizations etc.) to connect to the KNX-TP bus. This is used for programming and displays. KNXnet/IP interfaces are also important system devices, depending on the application and the clients connected via them. KNX interfaces should also be protected by surge arresters.

  • Hazard potential: Basically, KNXnet/IP routers or interfaces are connected to the building's own network. When using double shielded cables (incl. shield around the LAN connector), the ground of the device is connected to the ground of the network switch. These switches are often connected to PE, so that in the event of an overvoltage there is a risk of a massive potential rise, which can lead to a breakdown of the insulation in the KNXnet/IP router or the power supply to the KNX-TP or auxiliary voltage connections.

  • Protective measures: The best protection consists in the fast equalization of potential differences, if possible directly at the terminals. When connecting the system devices, we recommend not using double-shielded network cables with shielded connectors and / or including the power supply of the network switches in measures of internal lightning protection (type 1 / 2 arresters on the low-voltage side).

Recommendations

  • Arrangement of protection modules: Protect your KNXnet/IP routers or IP interfaces with two BlitzART KNX protection modules directly parallel to the two connections (KNX-TP and KNX auxiliary voltage). Position modules directly next to these system devices and route KNX bus and auxiliary voltage via the protection modules.

  • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block where the PE for the Ethernet switch is connected (if you use double shielded LAN lines). If you use UTP lines without shielded plugs for the LAN connection, then connect the PE of the modules to the same terminal block to which the associated KNX power supply for this line is connected (thus same or better impedance for the BlitzART modules as the KNX power supply).
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Lightning protection for KNX line amplifier etc.

Protection of KNX line couplers / area couplers / line amplifiers

  • Priority: KNX-TP line or area couplers or line amplifiers are one and the same system device with two KNX-TP interfaces, which can take one of these three roles in the KNX bus depending on the location in the topology. After the respective power supply, these are the second most important system devices, as they couple the areas / lines / segments of the topology with each other.

  • Hazard potential: These couplers connect two KNX TP bus segments with each other. In case of overvoltage events caused by lightning, there is a risk that the different lines / segments take on different potentials. In addition to endangering the KNX devices connected to these lines / segments, there is also a risk of breakdown through the insulation between the two KNX TP connections.

  • Protective measures: The best protection is always to quickly equalize potential differences between the two sides, preferably directly at the terminals.

Recommendations

  • Arrangement of protection modules: Protect your KNX line couplers with one BlitzART KNX protection module each directly parallel to the respective connection. Position the modules directly next to these system devices and route the KNX bus via the protection modules.

  • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supplies for both areas / lines / segments is connected (thus same or better impedance for the BlitzART modules as the KNX power supply).
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Lightning protection for KNX distributions

Protection of KNX distributions

  • Priority: KNX system devices are operationally important for the function of the bus system. The failure of a system device can - depending on function and use within the topology - affect hundreds to thousands of KNX devices in the bus communication.

  • Hazard potential: System devices such as power supply, KNXnet/IP router as well as IP interfaces are directly connected to PE via the respective protective earth connection or indirectly via the LAN connection (when using the usual double-shielded network connection cables). In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). This potential increase leads to the destruction of the insulation of the system devices and subsequently to damage to the electronics due to the overcurrent. In addition, these system devices are connected to the KNX bus, into which inductive and capacitive couplings occur in the event of a lightning strike, which can also cause damage to the transceivers of all bus participants.

  • Protective measures: BlitzART surge arresters simultaneously compensate for these resulting longitudinal voltages (PE with respect to bus) as well as transverse voltages (between the bus wires) with high performance outside the system devices. Optimum protection is achieved if all KNX devices in a distribution are protected against all bus lines leaving this distribution, especially if these bus lines lead to other parts of the building (= different protection zones according to lightning protection concept).

Recommendations

  • Arrangement of protection modules: For optimum protection and redundancy, we recommend planning at least two protection modules per segment. One of them close to the KNX power supply and other system devices and a second module. This is best done at the transition to other lightning protection zones. For each additional 50 to 100 m of bus line (or per floor) we recommend another protection module, especially in remote sub-distributions. Please make sure that the connection and the contacting are carried out carefully. Such modules must protect the bus for twenty to forty years, this can only be achieved with clean gas-tight connection of all cores and especially the PE connection.

  • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supplies is connected (thus same or better impedance for the BlitzART modules as the KNX power supply). Do not connect your KNXnet/IP router or the IP interface via double shielded LAN cables (recognizable by plugs with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX arrester for this (up to 28 V / 6 A).
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KNX lightning protection for Timberwolf server

Protection Timberwolf server (KNX and power supply)

  • Priority: The Timberwolf Server provides central logic and visualization components, records data series, and is a multifunctional gateway between a dozen protocols. Failure of the server results in limitation of monitoring, control and gateway functions that can be operationally important. Moreover, such a server is an expensive component and replacement including recovery is costly.

  • Hazard potential: The Timberwolf server has many interfaces and can therefore be connected to many different systems via long cables. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

  • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) with high performance outside the server. The KNX protection module can also be used to protect the operating voltage, as up to 6 A can be conducted via this.

Weitere BlitzART Schutzmodule

  • Schnittstelle RS-485: Für den Schutz der seriellen RS-485 Anschlüsse verwenden Sie bitte den entsprechende BlitzART RS-485 Überspannungsableiter
  • Schnittstelle 1-Wire: Für den Schutz der 1-Wire Anschlüsse verwenden Sie bitte das BlitzART PBM Überspannungsableiter
  • Schnittstelle RS-232: Für den Schutz des seriellen RS-232 Anschlusses verwenden Sie bitte den entsprechende BlitzART RS-232 Überspannungsableiter

 

    Recommendations

    • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Timberwolf server and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend routing such bus lines via another KNX protection module. Optimum protection is achieved if all interfaces used on the Timberwolf server are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. All connections should be potential-free. Please make sure that the connection and contacting is done carefully. Such modules must protect the bus for twenty to forty years, this can only be achieved with a clean gas-tight connection of all wires and especially the PE connection.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Timberwolf server to the Ethernet switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the power supply of the Timberwolf server (plus any Professional Busmaster connected to it). Ensure potential-free connection of all other bus systems.
    Buy BlitzART KNX

    KNX Lightning protection for Loxone Miniserver 1

    Protection Loxone Miniserver (KNX and power supply)

    • Priority: The Loxone Miniserver provides central logic and visualization functions. A failure of the miniserver leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is an expensive component and replacement including recovery are costly. As a Generation 1 version, the Miniserver has, among other things, a direct KNX-TP connection.

    • Hazard potential: The Loxone Miniserver has many interfaces, can be extended with extensions and can be connected to many different systems via long lines. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

    • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE to bus) and transverse voltages (between the bus wires) outside the server with high performance. The BlitzART LOX-PROTECT 24V module is available for the protection of the operating voltage.

    Weitere BlitzART Schutzmodule

    • Interface LINK: For the protection of the serial Loxone LINK connections please use the special BlitzART LOX-PROTECT LINK surge arrester.
    • RS-485 or Modbus Extension: For the protection of the serial RS-485 connections at the RS-485 Extension or Modbus Extension please use the appropriate BlitzART RS-485 surge arrester
    • 1-Wire Extension: To protect the 1-Wire connection on the 1-Wire Extension, please use the BlitzART 1-Wire surge arrester
    • RS-232 Extension: For the protection of the serial port on the RS-232 extension, please use the appropriate BlitzART RS-232 surge arrester
    • TREE Extension: For the protection of the TREE serial port on the TREE Extension, please use the appropriate BlitzART LOX-PROTECT TREE surge arrester

     

    Recommendations

    • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Loxone Miniserver and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. Optimum protection is achieved if all interfaces used on the Miniserver are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. Please make sure that the connection and the contacting are carried out carefully.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Loxone Server to the Ethernet Switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, you can also use a BlitzART LOX-PROTECT 24V arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply for the voltage supply of the Loxone Miniserver.
    Buy BlitzART KNX

    KNX Lightning Protection for Loxone Miniserver 2 & KNX Extension

    KNX-Blitzschutz für Loxone Miniserver 2 & KNX-Erweiterung

    • Priority: The Loxone Miniserver Gen 2 provides central logic and visualization functions. A failure of the Miniserver leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is an expensive component and replacement including recovery are costly. The miniserver in generation 2 does not contain an integrated KNX-TP connection. One (or more) Loxone KNX Extensions can be used on the Miniserver Gen 2.

    • Hazard potential: The Loxone Miniserver has many interfaces, can be extended with extensions and can be connected to many different systems via long lines. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

    • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE to bus) and transverse voltages (between the bus wires) outside the server with high performance. The BlitzART LOC-PROTECT TREE module is available for protecting the TREE connection and the BlitzART LOX-PROTECT 24V module is available for protecting the operating voltage.

    Weitere BlitzART Schutzmodule

    • Interface LINK: For the protection of the serial Loxone LINK connections please use the special BlitzART LOX-PROTECT LINK surge arrester.
    • RS-485 or Modbus Extension: For the protection of the serial RS-485 connections at the RS-485 Extension or Modbus Extension please use the appropriate BlitzART RS-485 surge arrester
    • 1-Wire Extension: To protect the 1-Wire connection on the 1-Wire Extension, please use the BlitzART 1-Wire surge arrester
    • RS-232 Extension: For the protection of the serial port on the RS-232 extension, please use the appropriate BlitzART RS-232 surge arrester
    • TREE Extension: For the protection of the TREE serial port on the TREE Extension, please use the appropriate BlitzART LOX-PROTECT TREE surge arrester

     

    Recommendations

    • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Loxone KNX Extension and the second protection module directly next to the KNX power supply. Further KNX system devices (routers, IP interfaces, line couplers) should be arranged in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. Optimum protection is achieved if all interfaces used on the Miniserver are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. Please make sure that the connection and the contacting are carried out carefully. If the KNX Extension is not installed in the same distribution (= different lightning protection zone) as the Miniserver, then we recommend protecting both sides of the LINK interfaces with anti-serially connected BlitzART LOC-PROTECT LINK modules (one to protect the Miniserver, the other to protect the KNX Extension). The same applies if the LINK bus is routed to other distributions, then we recommend providing a protection module at the outlet to the other distribution.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Loxone Server to the Ethernet Switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, you can also use a BlitzART LOX-PROTECT 24V arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply for the voltage supply of the Loxone Miniserver.
    Buy BlitzART KNX

    KNX lightning protection for GIRA X1 & S1

    Protection Gira X1 / S1 / L1

    • Priority: The Gira X1 / S1 / L1 devices provide central logic and visualization functions as well as Internet access / cloud connections. A failure of these components leads to the restriction of monitoring and control functions, which can be operationally important. In addition, these components are valuable and replacement including recovery are time-consuming. These recommendations also apply if only one module X1, L1 or S1 is used (or a different combination than shown here in the drawing).

    • Hazard potential: KNX modules such as the Gira modules are connected both to the KNX bus and a DC power supply, and to a network switch. Depending on the topology of the KNX bus system and the structure of the DC power supply, conductor loops can occur in which atmospheric discharges can induce high voltages. When using the usual double-shielded network connection cables (recognizable by the CAT6 connectors with shielding), these devices are connected to PE via the network switch. In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). Such a potential increase leads to the destruction of the insulation of these KNX devices and to a breakdown on the KNX bus or the power supply. In addition, inductive and capacitive coupling can occur on the bus line in the event of a lightning strike, which can lead to damage to the transceivers of all bus devices.

    • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) that occur outside these KNX devices with high performance.

    Recommendations

    • Arrangement of protection modules: We recommend to equip each KNX segment with at least two BlitzART KNX surge arresters, e.g. one protection module directly next to these GIRA KNX devices and the second protection module directly next to the KNX power supply. Further KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between these two protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. The low voltage side (230 V) of the power supply(s) should be protected with type 1 and type 2 surge arresters. Please ensure careful execution of the connection and contacting.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect these GIRA KNX modules to the Ethernet switch via double shielded LAN cables (recognizable by plugs with metal shield) to avoid indirect connections with PE. If this is not possible, connect the network switch to PE and include its low-voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX auxiliary voltage arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the voltage supply of the GIRA modules (or the auxiliary voltage of the KNX voltage supply).
    Buy BlitzART KNX

    KNX lightning protection for BABTEC EIBPORT

    Protection Babtec Eibport

    • Priority: KNX servers such as the Babtec Eibport provide central logic and visualization functions. A failure of this server leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is valuable and replacement including recovery is time-consuming.

    • Hazard potential: KNX servers such as the Babtec Eibport are connected to the KNX bus and a DC power supply as well as to a network switch. Depending on the topology of the KNX bus system and the structure of the DC power supply, conductor loops can occur in which atmospheric discharges can induce high voltages. When using the usual double-shielded network connection cables (recognizable by the CAT6 connectors with shielding), the Babtec Eibport is connected to PE via the network switch. In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). Such a potential increase can lead to the destruction of the insulation of the Babtec Eibport and to a breakdown on the KNX bus or the power supply. In addition, inductive and capacitive coupling can occur on the bus line in the event of a lightning strike, which can lead to damage to the transceivers of all KNX bus participants.

    • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) outside the Babtec Eibport with high performance.

    Recommendations

    • Arrangement of protection modules: We recommend to equip each KNX segment with at least two BlitzART KNX surge arresters, e.g. one protection module directly next to this KNX server Babtec Eibport and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between these two protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. The low voltage side (230 V) of the power supply(s) should be protected with type 1 and type 2 surge arresters. Please ensure careful execution of the connection and contacting.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect this Babtec Eibport to the Ethernet switch via double shielded LAN cables (recognizable by plugs with metal shield) in order to avoid indirect connections with PE. If this is not possible, connect the network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX auxiliary voltage arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the voltage supply of this Babtec Eibport (or the auxiliary voltage of the KNX voltage supply).
    Buy BlitzART KNX

    BlitzART for KNX / auxiliary voltage

    Buy BlitzART KNX

    Your advantages

    This BlitzART KNX surge arrester offer you:

    • Standard-compliant: We are KNX manufacturer
    • Ausgereift und Bewährt: Module sind seit fünf Jahren in zigtausenden Anlagen im Einsatz
    • High performance: Two protection levels with five protection and flashover sections
    • Very low protection level: Only 1/4 compared to single stage arrester
    • KNX-TP and auxiliary voltage: Double clamp set included

    Field of application

    Protect system devices and participants of the KNX bus system

    • KNX power supplies: in each segment, directly at the SV
    • KNX line amplifier: on both sides, in each segment, directly on the LV
    • KNX line coupler: on both sides, in each line, directly on the LK
    • KNX area coupler: on both sides, in each line, directly at the BK
    • KNX bus subscriber: Actuators, glass push-buttons, sensors, each per protection zone
    • KNXnet/IP interface: directly at the interface
    • KNXnet/IP Router: directly at the router


    Protect your KNX servers too

    • Timberwolf Server: KNXTP & auxiliary voltage, each directly before the server
    • Timberwolf Server KNX bus coupler: KNXTP, each before bus coupler
    • Loxone Miniserver 1: KNXTP, each directly in front of the server
    • Loxone Miniserver & KNX Extension: KNXTP, in each case directly in front of the extension
    • GIRA X1: KNXTP & auxiliary voltage, per X1, directly before the X1
    • GIRA S1: KNXTP & auxiliary voltage, per S1, directly before S1
    • EibPC: KNXTP & auxiliary voltage, per EibPC, directly in front of the server
    • BabTec EibPortC: KNXTP & auxiliary voltage, directly in front of the server

    When combining several such devices in one distribution, we recommend at least TWO protection modules per line or segment. Here, one protection module directly at the power supply, the second at the transition to other protection zones. If further modules are used, the third, fourth module, etc. before the most valuable devices.

    Scope of protection

    This two-stage surge arrester for information technology systems C2 / type 3 provides excellent protection against overvoltage from near and far lightning strikes as well as against overvoltages from switching operations with the inclusion of lightning current equipotential bonding (three connected conductors).

    Protection level (at 1,000 A)

    • Protection level between sw/rt: < 220 V
    • Protection level between sw/PE: < 220 V
    • Protection level between rt/PE: < 370 V


    Certification

    berspension arresters for information technology systems
    Pulse category C2, increased current load
    with 1,000 amps (8/20µs), fast rising edge
    according to DIN EN IEC 61643-21:2001 + A1:2009 + A2:2013

    by impulse and high current laboratory PHOENIX CONTACT, Blomberg
    accredited according to DIN EN ISO / IEC 17025:2018
    by the German Accreditation Body DAkkS with certificate DAkkS: D-PL-12161-03-00

    Technologies

    • Execution: Two-stage surge arrester
    • 1st stage: Three flashover paths via double-chamber gas voltage arresters
    • 2nd stage: Two protection paths via two bidirectional TVS protection diodes
    • Response time: approx. 40 ps (about 1,000 times faster than single-stage arrester)
    • Capacity: approx. 1 nF (corresponds to 10 m bus line)
    • Signal connection: Double terminal set for KNX-TP and auxiliary voltage
    • PE connection: Low impedance and uncut via ring terminal up to 6 mm².

    Overvoltage protection for KNX power supply

    Protection of KNX power supplies

    • Priority: The KNX power supply is the most important system device of a KNX line (KNX segment). Therefore, you should protect it with its own arresters.

    • Hazard potential: KNX power supplies must always be connected to PE. In the event of a lightning strike, there is a risk of a breakdown through the insulation of the KNX power supply due to potential rise.

    • Protective measures: The best protection consists in the fast equalization of potential differences, if possible directly at the terminals.

    Recommendations

    • Arrangement protection modules: Protect your KNX power supplies with two BlitzART KNX protection modules directly parallel to the connections (each for KNX-TP and KNX auxiliary voltage). Position modules directly next to the power supply and route KNX bus and auxiliary voltage via the protection modules.

    • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block where the PE for the KNX power supply is connected (same or better impedance for the BlitzART modules compared to the KNX power supply).
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    Lightning protection for IP router or IP interface

    Protection of the KNX IP router / IP interfaces

    • Priority: KNX IP routers work as KNX line or area couplers, where the LAN interface (Ethernet) is used as KNX backbone. Such an IP router is an important system device for connecting lines or areas via LAN. A failure would disconnect a line or area from the KNXnet/IP backbone. After the KNX power supply of the respective lines or segments, IP routers are the second most important system devices of a KNX installation and should be protected with own surge arresters. KNX IP interfaces are system devices similar to IP routers, which allow KNXnet/IP tunneling clients (e.g. ETS, visualizations etc.) to connect to the KNX-TP bus. This is used for programming and displays. KNXnet/IP interfaces are also important system devices, depending on the application and the clients connected via them. KNX interfaces should also be protected by surge arresters.

    • Hazard potential: Basically, KNXnet/IP routers or interfaces are connected to the building's own network. When using double shielded cables (incl. shield around the LAN connector), the ground of the device is connected to the ground of the network switch. These switches are often connected to PE, so that in the event of an overvoltage there is a risk of a massive potential rise, which can lead to a breakdown of the insulation in the KNXnet/IP router or the power supply to the KNX-TP or auxiliary voltage connections.

    • Protective measures: The best protection consists in the fast equalization of potential differences, if possible directly at the terminals. When connecting the system devices, we recommend not using double-shielded network cables with shielded connectors and / or including the power supply of the network switches in measures of internal lightning protection (type 1 / 2 arresters on the low-voltage side).

    Recommendations

    • Arrangement of protection modules: Protect your KNXnet/IP routers or IP interfaces with two BlitzART KNX protection modules directly parallel to the two connections (KNX-TP and KNX auxiliary voltage). Position modules directly next to these system devices and route KNX bus and auxiliary voltage via the protection modules.

    • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block where the PE for the Ethernet switch is connected (if you use double shielded LAN lines). If you use UTP lines without shielded plugs for the LAN connection, then connect the PE of the modules to the same terminal block to which the associated KNX power supply for this line is connected (thus same or better impedance for the BlitzART modules as the KNX power supply).
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    Lightning protection for KNX line amplifier etc.

    Protection of KNX line couplers / area couplers / line amplifiers

    • Priority: KNX-TP line or area couplers or line amplifiers are one and the same system device with two KNX-TP interfaces, which can take one of these three roles in the KNX bus depending on the location in the topology. After the respective power supply, these are the second most important system devices, as they couple the areas / lines / segments of the topology with each other.

    • Hazard potential: These couplers connect two KNX TP bus segments with each other. In case of overvoltage events caused by lightning, there is a risk that the different lines / segments take on different potentials. In addition to endangering the KNX devices connected to these lines / segments, there is also a risk of breakdown through the insulation between the two KNX TP connections.

    • Protective measures: The best protection is always to quickly equalize potential differences between the two sides, preferably directly at the terminals.

    Recommendations

    • Arrangement of protection modules: Protect your KNX line couplers with one BlitzART KNX protection module each directly parallel to the respective connection. Position the modules directly next to these system devices and route the KNX bus via the protection modules.

    • Connection PE: Please connect the PE of these BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supplies for both areas / lines / segments is connected (thus same or better impedance for the BlitzART modules as the KNX power supply).
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    Lightning protection for KNX distributions

    Protection of KNX distributions

    • Priority: KNX system devices are operationally important for the function of the bus system. The failure of a system device can - depending on function and use within the topology - affect hundreds to thousands of KNX devices in the bus communication.

    • Hazard potential: System devices such as power supply, KNXnet/IP router as well as IP interfaces are directly connected to PE via the respective protective earth connection or indirectly via the LAN connection (when using the usual double-shielded network connection cables). In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). This potential increase leads to the destruction of the insulation of the system devices and subsequently to damage to the electronics due to the overcurrent. In addition, these system devices are connected to the KNX bus, into which inductive and capacitive couplings occur in the event of a lightning strike, which can also cause damage to the transceivers of all bus participants.

    • Protective measures: BlitzART surge arresters simultaneously compensate for these resulting longitudinal voltages (PE with respect to bus) as well as transverse voltages (between the bus wires) with high performance outside the system devices. Optimum protection is achieved if all KNX devices in a distribution are protected against all bus lines leaving this distribution, especially if these bus lines lead to other parts of the building (= different protection zones according to lightning protection concept).

    Recommendations

    • Arrangement of protection modules: For optimum protection and redundancy, we recommend planning at least two protection modules per segment. One of them close to the KNX power supply and other system devices and a second module. This is best done at the transition to other lightning protection zones. For each additional 50 to 100 m of bus line (or per floor) we recommend another protection module, especially in remote sub-distributions. Please make sure that the connection and the contacting are carried out carefully. Such modules must protect the bus for twenty to forty years, this can only be achieved with clean gas-tight connection of all cores and especially the PE connection.

    • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supplies is connected (thus same or better impedance for the BlitzART modules as the KNX power supply). Do not connect your KNXnet/IP router or the IP interface via double shielded LAN cables (recognizable by plugs with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX arrester for this (up to 28 V / 6 A).
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    KNX lightning protection for Timberwolf server

    Protection Timberwolf server (KNX and power supply)

    • Priority: The Timberwolf Server provides central logic and visualization components, records data series, and is a multifunctional gateway between a dozen protocols. Failure of the server results in limitation of monitoring, control and gateway functions that can be operationally important. Moreover, such a server is an expensive component and replacement including recovery is costly.

    • Hazard potential: The Timberwolf server has many interfaces and can therefore be connected to many different systems via long cables. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

    • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) with high performance outside the server. The KNX protection module can also be used to protect the operating voltage, as up to 6 A can be conducted via this.

    Weitere BlitzART Schutzmodule

    • Schnittstelle RS-485: Für den Schutz der seriellen RS-485 Anschlüsse verwenden Sie bitte den entsprechende BlitzART RS-485 Überspannungsableiter
    • Schnittstelle 1-Wire: Für den Schutz der 1-Wire Anschlüsse verwenden Sie bitte das BlitzART PBM Überspannungsableiter
    • Schnittstelle RS-232: Für den Schutz des seriellen RS-232 Anschlusses verwenden Sie bitte den entsprechende BlitzART RS-232 Überspannungsableiter

     

      Recommendations

      • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Timberwolf server and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend routing such bus lines via another KNX protection module. Optimum protection is achieved if all interfaces used on the Timberwolf server are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. All connections should be potential-free. Please make sure that the connection and contacting is done carefully. Such modules must protect the bus for twenty to forty years, this can only be achieved with a clean gas-tight connection of all wires and especially the PE connection.

      • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Timberwolf server to the Ethernet switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the power supply of the Timberwolf server (plus any Professional Busmaster connected to it). Ensure potential-free connection of all other bus systems.
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      KNX Lightning protection for Loxone Miniserver 1

      Protection Loxone Miniserver (KNX and power supply)

      • Priority: The Loxone Miniserver provides central logic and visualization functions. A failure of the miniserver leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is an expensive component and replacement including recovery are costly. As a Generation 1 version, the Miniserver has, among other things, a direct KNX-TP connection.

      • Hazard potential: The Loxone Miniserver has many interfaces, can be extended with extensions and can be connected to many different systems via long lines. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

      • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE to bus) and transverse voltages (between the bus wires) outside the server with high performance. The BlitzART LOX-PROTECT 24V module is available for the protection of the operating voltage.

      Weitere BlitzART Schutzmodule

      • Interface LINK: For the protection of the serial Loxone LINK connections please use the special BlitzART LOX-PROTECT LINK surge arrester.
      • RS-485 or Modbus Extension: For the protection of the serial RS-485 connections at the RS-485 Extension or Modbus Extension please use the appropriate BlitzART RS-485 surge arrester
      • 1-Wire Extension: To protect the 1-Wire connection on the 1-Wire Extension, please use the BlitzART 1-Wire surge arrester
      • RS-232 Extension: For the protection of the serial port on the RS-232 extension, please use the appropriate BlitzART RS-232 surge arrester
      • TREE Extension: For the protection of the TREE serial port on the TREE Extension, please use the appropriate BlitzART LOX-PROTECT TREE surge arrester

       

      Recommendations

      • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Loxone Miniserver and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. Optimum protection is achieved if all interfaces used on the Miniserver are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. Please make sure that the connection and the contacting are carried out carefully.

      • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Loxone Server to the Ethernet Switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, you can also use a BlitzART LOX-PROTECT 24V arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply for the voltage supply of the Loxone Miniserver.
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      KNX Lightning Protection for Loxone Miniserver 2 & KNX Extension

      KNX-Blitzschutz für Loxone Miniserver 2 & KNX-Erweiterung

      • Priority: The Loxone Miniserver Gen 2 provides central logic and visualization functions. A failure of the Miniserver leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is an expensive component and replacement including recovery are costly. The miniserver in generation 2 does not contain an integrated KNX-TP connection. One (or more) Loxone KNX Extensions can be used on the Miniserver Gen 2.

      • Hazard potential: The Loxone Miniserver has many interfaces, can be extended with extensions and can be connected to many different systems via long lines. Depending on the topology of the connected extensions, bus systems and devices, conductor loops can occur (in which atmospheric discharges can induce high voltages) and ground loops are possible due to unfavorable wiring, which already lead to malfunctions during normal operation. BlitzART protection modules protect against overvoltages and the three- and four-stage modules also against overcurrent, including ground loops.

      • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE to bus) and transverse voltages (between the bus wires) outside the server with high performance. The BlitzART LOC-PROTECT TREE module is available for protecting the TREE connection and the BlitzART LOX-PROTECT 24V module is available for protecting the operating voltage.

      Weitere BlitzART Schutzmodule

      • Interface LINK: For the protection of the serial Loxone LINK connections please use the special BlitzART LOX-PROTECT LINK surge arrester.
      • RS-485 or Modbus Extension: For the protection of the serial RS-485 connections at the RS-485 Extension or Modbus Extension please use the appropriate BlitzART RS-485 surge arrester
      • 1-Wire Extension: To protect the 1-Wire connection on the 1-Wire Extension, please use the BlitzART 1-Wire surge arrester
      • RS-232 Extension: For the protection of the serial port on the RS-232 extension, please use the appropriate BlitzART RS-232 surge arrester
      • TREE Extension: For the protection of the TREE serial port on the TREE Extension, please use the appropriate BlitzART LOX-PROTECT TREE surge arrester

       

      Recommendations

      • Arrangement of protection modules: At least two BlitzART KNX surge arresters should be used in each KNX segment, e.g. one protection module directly next to the Loxone KNX Extension and the second protection module directly next to the KNX power supply. Further KNX system devices (routers, IP interfaces, line couplers) should be arranged in the same distribution between the protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. Optimum protection is achieved if all interfaces used on the Miniserver are protected by suitable surge arresters. The low voltage side (230 V) of the power supplies should be protected with type 1 and type 2 surge arresters. Please make sure that the connection and the contacting are carried out carefully. If the KNX Extension is not installed in the same distribution (= different lightning protection zone) as the Miniserver, then we recommend protecting both sides of the LINK interfaces with anti-serially connected BlitzART LOC-PROTECT LINK modules (one to protect the Miniserver, the other to protect the KNX Extension). The same applies if the LINK bus is routed to other distributions, then we recommend providing a protection module at the outlet to the other distribution.

      • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect the Loxone Server to the Ethernet Switch via double shielded LAN cables (recognizable by connectors with metal shield) to avoid further connections with PE. If this is not possible, connect this network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, you can also use a BlitzART LOX-PROTECT 24V arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply for the voltage supply of the Loxone Miniserver.
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      KNX lightning protection for GIRA X1 & S1

      Protection Gira X1 / S1 / L1

      • Priority: The Gira X1 / S1 / L1 devices provide central logic and visualization functions as well as Internet access / cloud connections. A failure of these components leads to the restriction of monitoring and control functions, which can be operationally important. In addition, these components are valuable and replacement including recovery are time-consuming. These recommendations also apply if only one module X1, L1 or S1 is used (or a different combination than shown here in the drawing).

      • Hazard potential: KNX modules such as the Gira modules are connected both to the KNX bus and a DC power supply, and to a network switch. Depending on the topology of the KNX bus system and the structure of the DC power supply, conductor loops can occur in which atmospheric discharges can induce high voltages. When using the usual double-shielded network connection cables (recognizable by the CAT6 connectors with shielding), these devices are connected to PE via the network switch. In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). Such a potential increase leads to the destruction of the insulation of these KNX devices and to a breakdown on the KNX bus or the power supply. In addition, inductive and capacitive coupling can occur on the bus line in the event of a lightning strike, which can lead to damage to the transceivers of all bus devices.

      • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) that occur outside these KNX devices with high performance.

      Recommendations

      • Arrangement of protection modules: We recommend to equip each KNX segment with at least two BlitzART KNX surge arresters, e.g. one protection module directly next to these GIRA KNX devices and the second protection module directly next to the KNX power supply. Further KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between these two protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. The low voltage side (230 V) of the power supply(s) should be protected with type 1 and type 2 surge arresters. Please ensure careful execution of the connection and contacting.

      • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect these GIRA KNX modules to the Ethernet switch via double shielded LAN cables (recognizable by plugs with metal shield) to avoid indirect connections with PE. If this is not possible, connect the network switch to PE and include its low-voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX auxiliary voltage arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the voltage supply of the GIRA modules (or the auxiliary voltage of the KNX voltage supply).
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      KNX lightning protection for BABTEC EIBPORT

      Protection Babtec Eibport

      • Priority: KNX servers such as the Babtec Eibport provide central logic and visualization functions. A failure of this server leads to the restriction of monitoring and control functions, which can be operationally important. In addition, the server is valuable and replacement including recovery is time-consuming.

      • Hazard potential: KNX servers such as the Babtec Eibport are connected to the KNX bus and a DC power supply as well as to a network switch. Depending on the topology of the KNX bus system and the structure of the DC power supply, conductor loops can occur in which atmospheric discharges can induce high voltages. When using the usual double-shielded network connection cables (recognizable by the CAT6 connectors with shielding), the Babtec Eibport is connected to PE via the network switch. In the event of a lightning strike, the potential of PE is massively raised (because a large part of the lightning energy is conducted into the building via the foundation earth electrode). Such a potential increase can lead to the destruction of the insulation of the Babtec Eibport and to a breakdown on the KNX bus or the power supply. In addition, inductive and capacitive coupling can occur on the bus line in the event of a lightning strike, which can lead to damage to the transceivers of all KNX bus participants.

      • Protective measures BlitzART surge arresters simultaneously compensate for longitudinal voltages (PE with respect to the bus) and transverse voltages (between the bus wires) outside the Babtec Eibport with high performance.

      Recommendations

      • Arrangement of protection modules: We recommend to equip each KNX segment with at least two BlitzART KNX surge arresters, e.g. one protection module directly next to this KNX server Babtec Eibport and the second protection module directly next to the KNX power supply. Other KNX system devices (routers, IP interfaces, line couplers) should be placed in the same distribution between these two protection modules. At the transition to other parts of the building (= other lightning protection zones), especially to outdoor installations, we recommend to route such bus lines first via another KNX protection module. The low voltage side (230 V) of the power supply(s) should be protected with type 1 and type 2 surge arresters. Please ensure careful execution of the connection and contacting.

      • Connection PE: Please connect the PE of the BlitzART modules on the shortest way and uncut to the SAME terminal block to which the PE for the respective KNX power supply is connected (thus the same or better impedance for the BlitzART modules as the KNX power supply). Do not connect this Babtec Eibport to the Ethernet switch via double shielded LAN cables (recognizable by plugs with metal shield) in order to avoid indirect connections with PE. If this is not possible, connect the network switch to PE and include its low voltage supply in the internal lightning protection via a type 1/2 surge arrester. If the switch is to be supplied with low voltage 12 or 24 V, then you can also use a BlitzART KNX auxiliary voltage arrester for this purpose (up to 28 V / 6 A). Use an exclusive power supply unit for the voltage supply of this Babtec Eibport (or the auxiliary voltage of the KNX voltage supply).
      Buy BlitzART KNX