Carrier 48/50PG C03-14, 48/50PM C16-28 manual ECB Connections, 48/50PG and PM

48/50PG and PM

Table 24 – ECB Connections

DISPLAY	POINT DESCRIPTION	SENSOR	TYPE OF I/O	CONNECTION
NAME		LOCATION		PIN NUMBER
		INPUTS
	Input power from MBB	control box	24 VAC	J1, 1-2
RM.OC	Remote occupancy switch	field installed	switch input	J4, 2
ENTH or	Outdoor enthalpy switch, or	economizer, or	switch input	J4, 4
IAQ.S	Indoor air quality switch	return/space
IAQ	Indoor air quality sensor	return/space	0-20 mA	J5, 2
OAQ or	Outdoor air quality sensor, or	field installed	0-20 mA	J5, 5
SP.RH	Relative humidity sensor
	Sensor Common		Ground	J5, 3
	Actuator Common		Ground	J7, 3
		OUTPUTS
	Output power to enthalpy switch		24 VAC	J4, 3
	Output power for loop power sensors		24 VDC	J5, 1
	Output power to economizer actuator		24 VAC	J7, 2
PE.1	Power exhaust 1 relay		relay	J8, 3
PE.2	Power exhaust 2 relay		relay	J8, 6
EC.CP or	Commanded Economizer position or		0-20 mA	J9, 1
F.SPD	Commanded Fan Speed
		COMMUNICATION
	Local Equipment Network (LEN)		communication	J2, 1-3
	Carrier Comfort Network (CCN)		communication	J3
EC.CP &	Economizer actuator position		MFT	J7, 1
EC.AP	(digital control)		communication

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