26 XR Series Installation and Technical Instructions
Wiring
RS 422 Wiring
1. Set the Communication Input Jumper (JP 1) to RS422 / 485.
2. Terminate the indicator’s communication wires at the RS 422 / 485
terminal (J4). See table below:
RS 485 Multi-Drop Wiring
1. Set the Communication Input Jumper (JP 1) to RS422 / 485.
Parallel Multi-drop wiring
Split Multi-Drop Wiring
Multi-Drop IDs are set using the CONFIG Dip-switches. For settings, see
Switches 8 & 9: Multi-Drop ID on page 36.
20 mA Current Loop Wiring
1. Set the Communication Input Jumper (JP 1) to 20mA LOOP.
2. Terminate the indicator’s communication wires at the 20 mA Current
Loop terminal (J5). See table below:
INDICATOR TO XR
TRANSMIT A (TX A) RECEIVE A (RX A)
TRANSMIT B (TX B) RECEIVE B (RX B)
SCALE CONTROLLER TO RD 1 TO RD 2 TO RD 3 ETC.
TX A RX A RX A RX A RX A
TX B RX B RX B RX B RX B
INDICATOR TO XR
20 mA TX + RECEIVE POSITIVE (RX +)
20 mA TX - RECEIVE NEGATIVE (RX -)
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