ABB AC500 - Grounding Considerations; AC500 System Dimensions; Dimensions of the CPU Terminal Bases (Front View)

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G1 Introduction to AC500 1-48 AC500 / Issued: 07.2006
The following procedure allows you to use the assembled modules as a template for drilling holes in the
panel. Due to module mounting hole tolerance, it is important to follow these procedures:
1. On a clean work surface, assemble no more than three modules (e.g. one TB + two TUs).
2. Using the assembled modules as a template, carefully mark the center of all module-mounting
holes on the panel.
3. Return the assembled modules to the clean work surface, including any previously mounted
modules.
4. Drill and tap the mounting holes for the recommended M4 or #8 screw.
5. Place the modules back on the panel and check for proper hole alignment.
6. Attach the modules to the panel using the mounting screws.
TIP:
If mounting more modules, mount only the last one of this group and put the others aside. This
reduces remounting time during drilling and tapping of the next group.
7. Repeat steps 1 to 6 for any remaining modules.
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 AC500 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 steel 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.
AC500 System dimensions
2828
59 (2.32)
70.5 (2.78)
135 (5.31)
67.5 (2.66)
(1.10)(1.10)
95.5 (3.76)
(2.27)
57.7
(1.59)
40.3
4.9 (0.19)
TB511
123.5 (4.86)TB521
179.5 (7.07)TB541
28
(1.10)
28
(1.10)
135 mm
(5.31) inches
Dimensions:
Figure: Dimensions of the CPU Terminal Bases (front view)