2-4. Interface Connections
2/99 2-13 U3-1021
Westinghouse Proprietary Class 2C
Figure 2-7. Terminal Block RS-485/RS-422 Four-Wire Serial Interface (1C31169G02)
(CE Mark)
Com
RES
RX+
RX-
RES
TX+
TX-
SH
Earth GND
Local Shield
Base Unit Terminal BlockThird Party Device
Add jumper if parallel
termination resistor is desired.
Com
TX+
TX-
RX+
RX-
Grounding
All field wiring must be braid-shielded and grounded at the entry point of the cabinet using the
Note
recommended hardware (refer to “Cable Guidelines” in U3-1000).
See note.
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