Carrier 48/50Z030-105 Table 87 Main Control Board (MBB) Inputs and Outputs, Fig. 27 Economizer Control Board (ECB) and Rooftop Control Board (RCB)

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Table 87 — Main Control Board (MBB) Inputs and Outputs
POINT
NAME POINT DESCRIPTION
I/O
POINT
NAME
PLUG AND PIN
REFERENCE SIGNAL PIN(S) PORT STATE
INPUTS
IGCIFO IGC IFO input DI1 J6, 3-4 4 0 = 24vac, 1= 0vac
FSD Fire Shutdown Switch DI2 J6, 5-6 6 0 = 24vac, 1= 0vac
GThermostat G input DI3 J7, 1-2 2 0 = 24vac, 1= 0vac
W2 Thermostat W2 input DI4 J7, 3-4 4 0 = 24vac, 1= 0vac
W1 Thermostat W1 input DI5 J7, 5-6 6 0 = 24vac, 1= 0vac
Y2 Thermostat Y2 input DI6 J7, 7-8 8 0 = 24vac, 1= 0vac
Y1 Thermostat Y1 input DI7 J7, 9-10 10 0 = 24vac, 1= 0vac
CSB_A1 Compressor A1 Feedback DIG1 J9, 10-12 10=5v, 11=Vin, 12=GND 0 = 5vdc, 1 = 0vdc
CSB_B1 Compressor B1 Feedback DIG2 J9, 7-9 7=5v, 8=Vin, 9=GND 0 = 5vdc, 1 = 0vdc
CSB_A2 Compressor A2 Feedback DIG3 J9, 4-6 4=5v, 5=Vin, 6 =GND 0 = 5vdc, 1 = 0vdc
CSB_B2 Compressor B2 Feedback DIG4 J9, 1-3 1=5v, 2=Vin, 3=GND 0 = 5vdc, 1 = 0vdc
DP_A Cir A Discharge Pressure AN1 J8, 21-23 21=5v, 22=Vin, 23=GND (thermistor 21-22) (0-5VDC, thermistor, ohms)
DP_B Cir B Discharge Pressure AN2 J8, 24-26 24=5v, 25=Vin, 26=GND (thermistor 24-25) (0-5VDC, thermistor, ohms)
SP_A Cir A Suction Pressure AN3 J8, 15-17 15=5v, 16=Vin, 17=GND (thermistor 15-16) (0-5VDC, thermistor, ohms)
SP_B Cir B Suction Pressure AN4 J8, 18-20 18=5v, 19=Vin, 20=GND (thermistor 18-20) (0-5VDC, thermistor, ohms)
RAT Return Air Temperature AN5 J8, 9-10 9 (thermistor, ohms)
SAT Air Temp Lvg Supply Fan AN6 J8, 11-12 11 (thermistor, ohms)
OAT Outside Air Temperature AN7 J8, 13-14 13 (thermistor, ohms)
SPT Space Temperature AN8 J8, 1-2 1 (thermistor, ohms)
SPTO Space Temperature Offset AN9 J8, 3-4 3 (thermistor, ohms)
IAQ IAQ - PPM Return CO2 (IAQANCFG = 1,2) AN10 J8, 5-6 5 (thermistor, ohms)
IAQINMOV 4-20ma/10k pot MinPosOver(IAQANCFG = 3,4) AN10 J8, 5-6 5 (thermistor, ohms)
FLTS Filter Status Switch AN11 J8, 7-8 7 (thermistor, ohms)
OUTPUTS
CMPB2 Compressor B2 RLY 1 J10, 20-21 20 = RLY1A (=RLY2A), 21 = RLY1B 1 = Closes RLY1A / RLY1B
CMPB1 Compressor B1 RLY 2 J10, 22-23 22 = RLY2A (=RLY1A), 23 = RLY2B 1 = Closes RLY2A / RLY2B
CMPA2 Compressor A2 RLY 3 J10, 24-25 24 = RLY3A (=RLY4A), 25 = RLY3B 1 = Closes RLY3A / RLY3B
CMPA1 Compressor A1 RLY 4 J10, 26-27 26 = RLY4A (=RLY3A), 27 = RLY4B 1 = Closes RLY4A / RLY4B
CONDFANB Condenser Fan Circuit B RLY 5 J10, 10-11 10 = RLY5A (=RLY6A), 11 = RLY5B 1 = Closes RLY5A / RLY5B
CONDFANA Condenser Fan Circuit A RLY 6 J10, 12-13 12 = RLY6A (=RLY5A), 13 = RLY6B 1 = Closes RLY6A / RLY6B
HS2 Heat Relay 2 RLY7 J10, 14-16 14 = 15 = RLY7A, 16 = RLY7B 1 = Closes RLY7A / RLY7B
HS1 Heat Relay 1 RLY 8 J10, 17-19 17 = 18 = RLY8A, 19 = RLY8B 1 = Closes RLY8A / RLY8B
PE1 Power Exhaust Relay 1 RLY 9 J10, 4-6 4 = 5 = RLY9A, 6 = RLY9B 1 = Closes RLY9A / RLY9B
SFAN Supply Fan Relay RLY 10 J10, 7-9 7 = 8 = RLY10A, 9 = RLY10B 1 = Closes RLY10A / RLY10B
ALRM Remote Alarm Relay RLY 11 J10, 1-3 1 = 2 = RLY11A, 3 = RLY11B 1 = Closes RLY11A / RLY11B
Fig. 27 — Economizer Control Board (ECB) and Rooftop Control Board (RCB)