Siemens SCALANCE XRH-300 Product Manual page 54

Connecting up
6.1 Safety when connecting up
Safety instructions for use in hazardous locations according to UL/FM HazLoc
If you use the device under UL or FM HazLoc conditions, you must also adhere to the following
safety instructions in addition to the general safety instructions for protection against explosion:
EXPLOSION HAZARD
You may only connect or disconnect cables carrying electricity when the power supply is
switched off or when the device is in an area without inflammable gas concentrations.
Safety notices when using according to FM
If you use the device under FM conditions you must also keep to the following safety notices in
addition to the general safety notices for protection against explosion:
EXPLOSION HAZARD
Do not disconnect while circuit is live unless area is known to be non-hazardous.
Safety instructions when using in accordance with UL 61010-1 / CSA-C22.2 No. 61010-1
If you use the device under UL 61010-1 / CSA-C22.2 No. 61010-1 conditions, you must also keep
to the following safety instructions in addition to the general safety instructions for protection
against explosion:
Connecting cables for DC power supply
To connect the power supply in the scope of validity of UL 61010-1 / CSA-C22.2 No. 61010-1,
only use copper cables.
Circuit breaker for DC power supply
An external switch or miniature circuit breaker must be provided and marked as circuit breaker
for the device. The circuit breaker must be located close to the device and easily accessible for
actuation.
For operation with AC power supply, the IEC plug is provided for disconnecting the device.
54
WARNING
WARNING
WARNING
WARNING
SCALANCE XRH-300/XRM-300
Equipment Manual, 10/2022, C79000-G8976-C546-01