Installation Guidelines - Siemens S5-155U System Manual

Installation Guidelines

System Manual
C79000-B8576-C199-03
The Installation Guidelines provide you with information for the
interference-free installation of the SIMATIC S5-135U/155U
programmable controllers.
This chapters describes the following:
• • Paths which serve for interference pickup in programmable
controllers, and five rules for ensuring electromagnetic
compatibility (EMC)
• • Interference-free installation of the programmable controllers
• • Cable routing, the connecting of cable shields and equipotential
bonding between equipment
• • The power supplies for control and load circuits, and the different
grounding concepts
• • Shielding and grounding for the connection of centralized and
distributed expansions and monitors to programmable controllers
• • The selection and design of cabinets
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