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G1 Introduction to AC500 1-47 AC500 / Issued: 07.2006
Panel mounting
If the CPU Terminal Base should be mounted with screws, Wall Mounting Accessories TA526 must be
inserted at the rear side first. These plastic parts prevent bending of the Terminal Base while screwing
on. TB511 needs one TA526, TB521 and TB541 need two TA526.
Holes for wall mounting
1
2
1
3
Rear view
Rear view
Front view
Figure: Fastening with screws of the Terminal Base TB521-ETH (as an example)
1 The two Wall Mounting Accessories TA526 are snapped on the rear side of the CPU Terminal Base
like DIN rails. The arrows point to the middle of the CPU Terminal Base. One TA526 is turned by 180°.
2 Two accessories for wall mounting inserted
3 CPU Terminal Base, fastened with screws. Use two screws per module (three for the TB). Use M4 or
#8 pan head screws. Mounting screws are required on every module.
By wall mounting, the CPU Terminal Base is earthed through the screws. It is necessary that
• the screws have a conductive surface (e.g. steel zinc-plated or brass nickel-plated)
• the mounting plate is earthed
• the screws have a good electrical contact to the mounting plate
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