Siemens CM 1542-5 Manual page 38

Approvals
You will find the temperature class on the type plate on the module.
Explosion Hazard -
Do not disconnect while circuit is live unless area is known to be non hazardous.
Explosion Hazard -
Substitution of components may impair suitability for Class I, Division 2.
Note
This equipment is suitable for use in Class I, Division 2, Group A, B, C, D or non-hazardous
locations only.
Note
For devices with C-PLUG memory: The C-PLUG memory module may only be inserted or
removed when the power is off.
Note
This plant has to be mounted according to the NEC (National Electrical Code) stipulations.
When used in environments according to class I, division 2 (see above) , the SIMATIC NET
S7 CPs must be mounted in an enclosure.
FM approval
Factory Mutual Approval Standard Class Number 3611,
Class I, Division 2, Group A, B, C, D, T3...T6 or
Class I, Zone 2, Group IIC, T3...T6.
You will find the temperature class on the type plate on the module.
Personal injury and damage to property may occur.
In hazardous areas, personal injury or property damage can result if you create or break an
electrical circuit during operation of a SIMATIC NET S7 CP (for example, by means of plug-
in connections, fuses, switches).
WARNING - EXPLOSION HAZARD: DO NOT DISCONNECT EQUIPMENT WHEN A
FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS PRESENT.
When used in hazardous locations (division 2 or zone 2), the device must be installed in an
enclosure.
38
WARNING
WARNING
Manual, 11/2014, C79000-G8976-C290-02
CM 1542-5