ABB AC500 PLC Hardware Manual page 1199

Fig. 203: Side, front and back view
2.5.3 Mounting and Demounting
The control system is designed to be mounted to a well-grounded mounting surface such as a
metal panel. Additional grounding connections from the mounting tabs or DIN rail (if used), are
not required unless the mounting surface cannot be grounded.
2.5.3.1 Mounting and Demounting of the AC500-eCo CPUs
Mounting a Pro-
cessor Module
on a DIN Rail
2019/04/17
During panel or DIN rail mounting of all devices, be sure that all debris (metal
chips, wire strands, etc.) is kept from falling into the controller. Debris that falls
into the controller could cause damage while the controller is energized.
All devices are grounded through the DIN rail to chassis ground. Use zinc
plated yellow-chromate stell DIN rail to assure proper grounding. The use of
other DIN rail materials (e.g. aluminium, plastic, etc.) that can corrode, oxidize,
or are poor conductors, can result in improper or intermittent grounding.
NOTICE!
Risk of function faults!
The processor module is earthed via DIN rail.
The DIN rail must be included into the earthing conception of the plant.
3ADR010121, 13, en_US
System Assembly, Construction and Connection
AC500-eCo > Mounting and Demounting
1199