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G1  Introduction to AC500  1-70  AC500 / Issued: 07.2006 
Grounding considerations 
This product is designed to be mounted to a well-grounded mounting surface such as a metal panel. 
Additional grounding connections from the S500 mounting tabs or DIN rail (if used), are not required 
unless the mounting surface cannot be grounded. Refer to appropriate Chapter of the S500-FBP User's 
Manual, for additional information. 
 ATTENTION 
This product is 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. 
S500 system dimensions 
67.5 (2.66)
TU505/506
59 (2.32)
70.5 (2.78)
TU515/516/531/532
135 (5.31)
67.5 (2.66)
(2.27)
DC505
135 mm
(5.31) inches
57.7
Dimensions:
 
Figure: Dimensions of the Terminal Unit (front view)