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Connecting to the Host’s RS-422A/485 Port Section 5-2
Preparing the Shield of RS-422A/485 Connectors
Always prepare RS-422A/485 cable shields properly. Otherwise, communica-
tions errors may occur with the host.
Ground only one end of the shield when connecting the ground terminal (GR)
of the devices to the functional ground (FG: ), and grounding each signal
line at only one point and to 100
Ω max, as shown in Figure (a).
Ground both ends of the shield when not grounding the functional ground
(FG: ) of the PT, as shown in Figure (b).
When using a CJ1M-CIF11 alone or combined with an NT-AL001, be sure to
connect, process the shield, and connect to ground as shown in Figure (b).
Example of Recommended Wiring
Signal line
Signal line
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