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Manual 2100-725C
Page
21 of 39
TABLE 4
MULTI-TEC Wall-Mount Unit Control Board Terminals
Terminal
Function
Type
Form
Rx+/Tx+
Communication
Rx-/Tx-
Communication
DI1
Unit Disable
Digital
N/C
DI2
Dirty Filter Switch
Digital
N/C
DI3
High Pressure (CCM)
Digital
N/C
DI4
Low Pressure Switch
Digital
N/C
DI5
Not Used
DI6
Damper Blade Switch
Digital
N/C
DI7
Not Used
GND
Digital Ground
B1
Mixed Air Temperature Sensor
Analog Input
10K Ohm Curve J
B2
Outdoor Air Temperature Sensor
Analog Input
10K Ohm Type
B3
Return Air Temperature Sensor
Analog Input
10K Ohm Curve J
B4
Not Used
B5
Outdoor Humidity Sensor
Analog Input
B6
Not Used
B7
Freeze Temperature Sensor
Analog Input
10K Ohm Curve J
GND
Analog Ground
+VDC
24VDC to Outdoor Air Sensor
B8
Suction Temperature Sensor
Analog Input
10K Ohm Curve J
B9
Suction Pressure Sensor
Analog Input
Y1
Not Used
Y2
2-10VDC to Damper Actuator
Y3
Not Used
GND
Ground
C1
24VAC+
Power
NO1
Cool 1 Out
Relay Output
NO2
Not Used
NO3
Reheat Valve
C2
24VAC+
Power
NO4
Stage 1 Heating
Relay Output
NO5
Stage 2 Heating
Relay Output
NO6
Not Used
NO7
Blower 1
Relay Output
C7
24VAC+
NC7
Not Used
C8
Not Used
NO8
Blower 2
Relay Output
NO9
Blower 3
Relay Output
GO
24VAC Ground
G
24VAC Hot