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6. Communication wiring
6.1 RS485 communication wiring
UOM communicate with iFDC/iEDC via RS485 communication. Each should be directly connected.
Refer to table below for RS485 communication with multiple connections
iFDC/iEDC
TRX+
TRX-
(Figure: RS485 Communication with multiple connections)
7. Board status LED description
7.1 UOM board status LED description
For LED configuration, please refer to 'Figure: UOM board configuration' above. When UOM is working
properly, each LED lights up as below description
LD #1
Shows power status. When power is supplied, it always lights up.
Shows normal operating status of the board.
LD #6
Repeated ON and OFF signal indicates normal status.
.
Direct connection
UOM #1
UOM #2
TRX+
TRX+
TRX-
TRX-
12
User Manual
UOM #3
UOM #4
TRX+
TRX+
TRX-
TRX-
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