Rockwell Automation T80004 Application Note Field Loop Configuration - Manual (Page 51)

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AN-T80004 Field Loop Configuration
Issue 10 Jun 13 AN-T80004 51
Cable earth and screen wires
At either end of an I/O cable there may be a braid or heavy gauge green or green/yellow cable. This is
the protective earth and should be bolted to safety earth. The chassis have a row of threaded holes for
terminating these braids.
On some I/O cables there may be a thin green wire. This is a screen earth and should be wired to a
separate terminal, connected to a clean reference earth separate from safety earths.
24V
Channel
0V
250R
250R nominal
Channel
output
0V
Channel
output
0V
250R nominal