Hardware reference guide

Pwr. & Grnding. Guide
726
35013379 11/2011
Analog Grounding Consideration
Overview
For the Analog Input Modules, the earthing must be done by the analog wires.
Analog wires must be grounded directly when entering the cabinet. You may use an
analog cable grounding rail. This section describes this approach.
Principle
High frequency interference can only be discharged via large surfaces and short
cable lengths.
Guidelines
Follow these wiring guidelines:
z Use shielded, twisted-pair cabling.
z Expose 2.5 cm (1 inch) as shown:.
z Make sure the wire is properly grounded (connection between the grounding bar
and the clamps).