ONICON System-30 MODBUS BTU - Manual (Page 27)

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System-30 BTU Measurement System MODBUS RTU RS485 04/14 - 0583-1 / 18345
Page 27
4.6 BIASING AND TERMINATION
The ONICON System-30-MOD BTU Meter does not provide biasing voltage to the RS-485
network. A jumper selectable 120 ohm resistor is provided as shown below. The termination
resistor should only be used when the meter is installed at the end of the line.
120
termination
resister jumper