Carrier 50EY, 50EJ, 50EW, 50EK I/O Channel Designations, Base Module Ð CV, Base Module Ð VAV

Tables 21-23 show the input and output channel designations.

	Table 21 Ð I/O Channel Designations
			Base Module Ð CV
TERMINAL				ASSIGNMENT
NO.
T1-2			SPT (CCN) Ð 10K V Thermistor
T3-4			STO (CCN) Ð 10K V Thermistor
T5-6			OAT Ð 5K V Thermistor
T7-8			SAT Ð 5K V Thermistor
T9-10				Ð
T11-12			SAT Reset Ð AI (2-10 vdc)
T13-14				Ð
T15-16				Ð
T17-25			Y1 or Remote Start/Stop Ð DI (24 vac)
T18-25			Y2 Ð DI (24 vac)
T19-25			W1 Ð DI (24 vac)
T20-25			W2 Ð DI (24 vac)
T21-25			G Ð DI (24 vac)
T22-25			Compressor 1 Safety Ð DI (24 vac)
T23-25			Compressor 2 Safety Ð DI (24 vac)
T24-25			Outside Air Enthalpy Ð DI (24 vac)
T26-27			Economizer Pos. Ð AO (4-20 mA)
T28-29			Heat 1 Relay Ð DO (24 vac)
T30-29			Heat 2 Relay Ð DO (24 vac)
T31-32			CV Power Exhaust 1/Modulating Pwr Exht Ð DO
			(115 vac)
T33-32			CV Power Exhaust 2 Ð DO (115 vac)
T34-35			Condenser Fan Ð DO (115 vac)
T36-35			OFC2 Ð DO (115 vac)
T37-38				Ð
T39-38				Ð
K1			Indoor Fan Relay Ð DO (HV)
K2			Compr. 1 Ð DO	(HV)
K3			Compr. 2 Ð DO	(HV)
		LEGEND
	(Tables 21 and 22)
AI	Ð	Analog Input
AO	Ð Analog Output
CCN Ð Carrier Comfort Network
CV	Ð Constant Volume
DI	Ð	Direct Input
DO	Ð Direct Output
HV	Ð High Voltage
KV	Ð Kilo-Ohms
OAT	Ð Outdoor-Air Temperature
OFC Ð Outdoor Fan Contactor
RAT	Ð Return-Air Temperature
SAT	Ð Supply-Air Temperature
SPT	Ð Space Temperature
STO	Ð Space Temperature Offset

TÐ Terminal

VAV Ð Variable Air Volume

Table 22 Ð I/O Channel Designations
	Base Module Ð VAV
TERMINAL	ASSIGNMENT
NO.
T1-2	SPT (CCN) Ð 10K V Thermistor
T3-4	RAT Ð 5K V Thermistor
T5-6	OAT Ð 5K V Thermistor
T7-8	SAT Ð 5K V Thermistor
T9-10		Ð
T11-12	SAT Reset Ð AI (2-10 vdc)
T13-14		Ð
T15-16		Ð
T17-25	Remote Start/Stop Ð DI (24 vac)
T18-25		Ð
T19-25		Ð
T20-25		Ð
T21-25		Ð
T22-25	Compressor 1 Safety Ð DI (24 vac)
T23-25	Compressor 2 Safety Ð DI (24 vac)
T24-25	Outside Air Enthalpy Ð DI (24 vac)
T26-27	Economizer Pos. Ð AO (4-20 mA)
T28-29	Heat 1 Relay Ð DO (115 vac)
T30-29	Heat Interlock Relay Ð DO (115 vac)
T31-32	Modulated Power Exhaust Ð DO (115 vac)
T33-32		Ð
T34-35	Condenser Fan Ð DO (115 vac)
T36-35	OFC2 Ð DO (115 vac)
T37-38	Unloader 1 Ð DO (115		vac)
T39-38	Unloader 2 Ð DO (115		vac)
K1	Indoor Fan Relay Ð DO (HV)
K2	Compr. 1 Ð DO	(HV)
K3	Compr. 2 Ð DO	(HV)

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