
2-19
SIMATIC 545/555/575 System Manual
Pre-installation Guidelines
Ground your 545/555 controller by following the guidelines below to ensure
that noise is minimized.
• Use the ground connection (Figure 2-13) to attach one end of a ground
wire; attach the other end to a nearby grounding rod that meets all
electrical specifications required for an earth ground.
• Use the shortest possible length of #8-gauge copper wire, or equivalent
braided cable, to make the connection.
G
G
Figure 2-13 Grounding the 545/555 Controller Chassis
If the system is mounted in a cabinet or rack, use the same grounding
procedure. Ensure that a good cabinet or rack ground connection is achieved
by removing existing paint and attaching a #8 gauge copper wire (or
equivalent) using a bolt, washers, and nut as necessary.
Grounding the
545/555 Controller
Chassis
Grounding the
Cabinet or Rack
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