1. Sample Supply – The input port for connection from the UGC’s Sample Supply port.
2. Sample Return – The output port for connection to the next gas sensor or to the UGC’s “Sample
Return” port.
3. Reference Supply – The input port for connection from the UGC’s “Reference Supply” port.
4. Reference Return – The output port for connection to the UGC’s “Reference Return” port.
5. 24VDC ⎓ 1A – DC coaxial jack for connection to a suitable power supply.
6. CI-Bus – Two ports for connection to the CI-Bus.
7. Power – An indicator (typically green) in the top left corner which indicates connection to DC power.
8. Tx – An indicator (typically green) in the bottom left corner which indicates the host computer is
transmitting data.
9. Rx – An indicator (typically yellow) on the bottom right corner which indicates the Oxygen Sensor is
transmitting data.
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