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5.2. Sensor Cell Connection
The MC-4231-CO monitor may be connected to either 2 wire or 3 wire City
Technology sensor cells.
For 2 wire cells, connect the SENSE (white/black wire) to J1-4 (SEN) and connect the
COUNTER (white/red wire) to J1-6 (CTR).
Note:
The REF is not used with the 2
wire sensor cell.
Note: Jumper DS5 is hardwired for 2 wire (2-3).
For 3 wire cells, connect the SENSE (white/black wire) to J1-4 (SEN). Connect the
REFERENCE (white wire) to J1-5 (REF) and connect the COUNTER (white/red wire)
to J1-6 (CTR).
Note: Jumper DS5 must be changed to 3 wire (1-4).
5.3. Warn/Alarm Output Connection
The warning and alarm outputs are used to provide audible and visual outputs to
indicate the monitor preset levels have been exceeded. The MC-4231-CO uses 2 each
103 dB Sonalerts as an audible indicator and a 10 LED cluster as a visual indicator.
Connect the (+) side of both the audible and visual devices to + 28 VDC. Connect the
(-) side of the LED cluster to J1-7(WRN). Connect the (-) side of the Sonalerts to J1-
8 (ALM).
5.4. Alarm Reset Switch Connection
A push-botton alarm reset switch is provided to turn the Sonalerts OFF after they
have been activated. Connect the reset switch to J4-1 and J4-2.
5.5. Analog Input # 1 and Analog Input # 2 Connection
When the MC-4231-CO monitor is used with the PLC Monitor System, it may be
connected to other sensors or transducers that provide a voltage output of 0 to +3
VDC or a 4 to 20 current mode output. The monitor will convert the analog input
signal and send the value back to the Monitor System Master Station. Analog input # 1
is connected between J4-3(+) and J4-4 (-). Analog # 2 is connected between J4-5 (+)
and
J4-6(-).
If the input is from a voltage mode sensor, connect the (+) voltage output and the
(-) return to the connector as defined above.
If the input is from a current mode sensor, connect the current loop monitor resistor
across the J4 (+) and (-) connections as defined above.
