AMC 1ACOs, Instructions Manual, Page: 16 / 33

AMC-1ACOs One Channel CO Monitor with DSI
12
1 2 3 4 5 6
PIN DESCRIPTION
1
Signal Ground, “-“
2
4-20 mA Current Output
3
N/A
4
N/A
5
Chassis Ground
6
N/A
FIGURE 6: Signal input/output terminal block.
Note:
Use Copper Conductors Only.
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On-Board Sensor Connection
The on-board CO sensor has a socket connection to the DSI board for easy sensor replacement
in the field. For removal, unplug the sensor from the DSI when the main power supply is turned
off. For installation, hold the sensor in such a way that the sensing area is not covered. Align the
sensor pins with pin sockets on the DSI and lightly push the sensor on to the DSI. Sensors need
to be calibrated at regular intervals, see 5.6.3 AMC-DSI CALIBRATION for procedure. Sensor
replacement is needed when the sensor life has expired; see 6.3 SENSOR REPLACEMENT for
details.
CAUTION
TURN OFF THE MAIN POWER SUPPLY BEFORE REMOVING OR INSTALLING THE SENSOR(S).
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Building Automation Wiring
The building automation system is wired to the Gas Monitor through the signal input/output
terminal block on the DSI board. The wiring is conveyed in the following table.