ARS*-B2-IA*
Installation
2024-03
15
3 Installation
3.1 General Installation Information
The device can get very hot during operation. To protect the device from excessive heating,
observe the required clearances and sufficient ventilation when installing the device.
3.2 Installation in a Surrounding Enclosure in Zone 2
The rail field switch includes electrical circuits that are not intrinsically safe. When mounted in
explosion-hazardous areas, special care has to be taken when opening the enclosure of the rail
field switch while it is energized.
Opening the enclosure is only authorized when the following conditions are given:
• When a potentially explosive atmosphere is absent, or
• When the non-intrinsically safe circuits of the rail field switch are protected by a degree of
protection IP30
The following are examples of how to comply with degree of protection IP30. The examples
vary depending on the type of terminal of the auxiliary power connector of the rail field switch.
Versions with Screw Terminals (ARS*-1)
Ethernet ports P1 ... P4
Not used Ethernet ports P1 ... P4 have to be equipped with the corresponding covers:
• Protection cover ACC-PC-45 for Ethernet ports P1 and P2
• Protection cover ACC-PC-SFP for Ethernet ports P3 and P4
Danger!
Explosion hazard from damaged electronic components
Premature wear of electronic components in a device that was previously used in a general
electrical installation can cause sparks that can ignite the surrounding potentially explosive
atmosphere.
Never install devices that have already been operated in general electrical installations in elec-
trical installations used in combination with hazardous areas!
Danger!
Explosion hazard from exposure to potentially explosive gas atmosphere
If the device is installed in Zone 2 without mounting it in a sufficiently suitable
surrounding enclosure, gas, dust, water or other external interferences can cause the live
device to spark. The sparks can ignite the surrounding potentially explosive atmosphere.
Mount the device in a surrounding enclosure that complies with the requirements for surround-
ing enclosures according to IEC/EN 60079–0, and that is rated with the degree of
protection IP54 according to IEC/EN 60529. The surrounding enclosure must have an
EU declaration of conformity according to the ATEX Directive for at least
equipment protection level Gc.
Danger!
Explosion hazard from exposure to potentially explosive dust atmosphere
If the device is installed in Zone 22 without mounting it in a sufficiently suitable
surrounding enclosure, dust, water or other external interferences can cause the live device to
spark. The sparks can ignite the surrounding potentially explosive atmosphere.
Only mount the device in a suitable surrounding enclosure. The surrounding enclosure must
have an EU declaration of conformity according to the ATEX Directive for at least equipment
protection level Dc.
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