ABB AC500 PLC Hardware Manual page 1261

Dimensions:
FM502-CMS
Fig. 223: Function Module Terminal Bases and Function Modules for CMS, side view and front view
2.6.3 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.
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.
3ADR010121, 13, en_US
System Assembly, Construction and Connection
AC500 (Standard) > Mounting and Demounting
1261