MODEL 1000 SEP 2005
INSTALLATION AND SETUP
3-7
3.1.3 Signal Wiring
1
Observe Precautions and Warnings
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2
Plan Site Location
3
Obtain Supplies and Tools
4
Install Analyzer Wiring
Follow these general precautions for field wiring digital and analog input/output (I/O) lines:
(1) Metal conduit must be used for all process signal wiring.
(2) Metal conduit used for process signal wiring must be grounded at conduit support points
(grounding the conduit at multiple points helps prevent induction of magnetic loops between
the conduit and cable shielding).
(3) Use suitable lubrication for wire pulls in conduit to prevent wire stress.
(4) All process signal wiring should be a single, continuous length between field devices and the
GC Controller. If, however, length or conduit runs require that multiple wiring pulls be
made, the individual conductors must be interconnected with suitable terminal blocks.
(4) Use separate conduits for AC voltage and DC voltage circuits.
(5) Do not place digital or analog I/O lines in same conduit as A-C power circuits.
(6) Use only shielded cable for digital I/O line connections.
(a) Ground the shield at only one end.
(b) Shield-drain wires must not be more than two AWG sizes smaller than the
conductors for the cable.
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