Grounding
Grounding
Grounding
The equipment must be grounded to reduce the
risk of static sparking and electric shock. Electric
or static sparking can cause fumes to ignite or
explode. Improper grounding can cause electric
shock. Grounding provides an escape wire for the
electric current.
The DCM and ADCM are used in a variety of
systems, with varying grounding requirements.
Follow all instructions in your system manual.
Non-
Hazardous
Area
Non-
Hazardous
Area
Hazardous
Area
Hazardous
Area
Power Supply Located in Non-Hazardous Area
Power Supply Located in Hazardous Area
KEY
KEY
KEY
A
A
A
DCM or ADCM
B
B
B
Power Supply and Barrier
Power cable CANNOT have cable shield tied to coupling nut. 500 VAC isolation is required.
The power cable and circuit board are isolated from the DCM/ADCM enclosure. They have
conductive paths to SEPARATE
SEPARATE
SEPARATE grounds
grounds
grounds.
Power cable CAN have cable shield tied to coupling nut. Power cable coupling nut and
DCM/ADCM have conductive path to COMMON
COMMON
COMMON ground
ground
ground.
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