Modine Manufacturing Airedale ClassMate CMD - Unit Controller Inputs and Outputs

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MODINE CONTROLS SYSTEM MANUAL
ClassMate and SchoolMate Models
AIR74-525.1
Main Unit controller Inputs/Outputs
The inputs and outputs of the controller are listed below. Note that some items are optional and may not be installed on all
models.
pCOOEM+ Input and Output Terminals
I/O Type Output # Voltage Description Notes Standard
Model Nomenclature Digit Or
Optional
Universal I/O
U1 Universal Return Air Sensor Carel NTC 10K@77˚F

U2 Universal Indoor Coil Sensor Carel NTC 10K@77˚F

U3 Universal
Outdoor Coil Sensor Or
Coaxial Coil Sensor
Carel NTC 10K@77˚F
Outdoor Coil Digit 1,2 =CM
Coaxial Coil Digit 1,2= SM
U4 Universal Supply Air Sensor Carel NTC 10K@77˚F

U5 Universal CO2 Sensor 4-20mA Optional
U6 Universal Outdoor Humidity Sensor 4-20mA Optional
U7 Universal Indoor Humidity Sensor 4-20mA Optional
U8 Universal Outdoor Air Sensor Carel NTC 10K@77˚F

U9 Universal Not Used Not Used
U10 Universal Mechanical Thermostat
+/- 3˚F mechanical
setpoint
Optional
U11 Universal Head Pressure Transducer 4-20mA Optional
U12 Universal Not used Not Used
Digital Input
DI1
Voltage
Free, Uses
Continuity
to Test
Status
Condensate Pan Float Switch Normally Closed Optional
DI2 Low Limit Status Normally Open Optional
DI3 Supply Fan Status
Normally Closed while
running

DI4
Condenser Fan Status Or
Exhaust Fan Status
Both Normally Closed
while running

DI7 24Vac Dirty Filter Status Normally Open Optional
DI8 24Vac
Mechanical Thermostat Or
Occupancy Sensor Or
Key Override Or
Twist Timer
All All Normally open
When Closed it sends unit
into occupied mode
Optional
DI9 24Vac Low Pressure Switch Normally Open

DI10 24Vac High Pressure Switch Normally Open

Analog Output
Y1 0-10V Economizer Damper with Economizer Digit 9 = B,D,E,G,J,K,M,N,P
Y2 0-10V Hot Water Valve with Hot water Heat Optional
Y3 0-10V
Condenser Fan Speed Control Or
Exhaust Fan Speed Control
With Condenser Fan
With Exhaust Fan

Condenser Fan Digit 3= D,P
Exhaust Fan Digit 3= S,G,W
Y4 0-10V Ventilation Fan Speed Control with ERV and Economizer Digit 9 =C,D,E,H,J,K,N,P
Y5 0-10V Baseboard Heat
Controls baseboard heat
output
Optional