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Emerson Climate Technologies
102
EX Valves & Controls
Block Diagrams
EC2-31x / -39x Case Controller (EX2, Temp/Temp)
Inputs
1 = Coil in temperature
2 = Coil out temperature
3 = Air in temperature
4 = Air out temperature
5 = Defrost temperature
EC2-35x / -37x Case Controller (EX2, Press/Temp)
EC2-21x / -29x Case Controller (TXV) EC2-11x Universal I/O Controller
Inputs
1 = Digital Input
2 = Digital Input
3 = Air in temperature
4 = Air out temperature
5 = Defrost temperature
Inputs
1 = Digital Input
2 = Digital Input
3 = Temperature input
4 = Temperature input
5 = Temperature input
181
1 2 3 4 5
Inputs
1 = Suction pressure
2 = Coil out temperature
3 = Air in temperature
4 = Air out temperature
5 = Defrost temperature
Outputs
6 = EX2 Expansion valve
7 = Compressor (EC2-35x only)
Spare relay (EC2-37x only)
8 = Fan
9 = Defrost heater
Outputs
6 = EX2 Expansion valve
7 = Compressor (EC2-31x only)
Spare relay (EC2-39x only)
8 = Fan
9 = Defrost heater
Outputs
6 = Solenoid valve
7 = Compressor (EC2-21x only)
Spare relay (EC2-29x only)
8 = Fan
9 = Defrost heater
Outputs
6 = Digital output
7 = Digital output
8 = Digital output
9 = Digital output
EC2 Series