Introduction
1.4 Loss of explosion protection
PS2 Troubleshooting Guide
6 Service Manual, 03/2017, A5E36661550-AA
Loss of explosion protection
Loss of explosion protection
Danger of explosion in hazardous areas if the device is open or not properly closed.
• Close the device as described in Chapter "Technical data" in Operating Instructions
A5E00074631.
Opening device in energized state
Opening device in energized state
Danger of explosion in areas subject to explosion hazard.
• Only open the device in a de-energized state.
• Check prior to commissioning that the cover, cover locks, and cable inlets are
assembled in accordance with the directives.
: Devices having the type of protection "Intrinsic safety Ex i" may also be opened
in energized state in hazardous areas.
Water in compressed air line
Water in compressed air line
Device damage and possibly loss of type of protection. The factory setting for the purging
air selector is "IN". In the "IN" position, water from the compressed air line may enter the
device from the pneumatics during initial commissioning.
• Before commissioning, make sure no water is present in the compressed air line.
If you cannot be sure that there is no water in the compressed air line:
• Set the purging air selector to "OUT". In this way, you prevent water from the
compressed air line from penetrating the device.
• Only set the purging air selector to "IN" again when all water has been discharged from
the compressed air line.
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