Safety instructions
2.3 Use in hazardous areas
SIMATIC IPC277E
Operating Instructions, 11/2019, A5E35783335-AE
29
2.3
Use in hazardous areas
The following warnings apply to operating a device with Ex approval in hazardous areas.
DANGER
DC-Version
If a main circuit breaker for DC-supply should be installed in hazardous locations as
described above it has to be intended for use in that area. Otherwise it must be installed in
an area which is known to be non-hazardous.
WARNING
Opening the device
DO NOT OPEN WHEN ENERGIZED.
WARNING
Risk of explosion when connecting or disconnecting the device
Do not connect or disconnect while circuit is live unless area is known to be non-hazardous.
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, and D or non-
hazardous locations only.
WARNING
Warning - Explosion Hazard - Batteries Must Only Be Changed In An Area Known To Be
Non-Hazardous
The lithium battery shall only be replaced by a trained technician.
WARNING
Replacing components
EXPLOSION HAZARD
WARNING - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR
CLASS I, DIVISION 2 OR ZONE 2.
