Carrier 48/50PD05 - Manual (Page 48)

48
Table 19 — MBB Connections
DISPLAY
NAME
POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O
CONNECTION
PIN NUMBER
INPUTS
Input power from TRAN1 control box 24 VAC J1, 1---3
IGC Fan Request gas section switch input J6, 4
FDWN Fire shutdown switch supply/return/space switch input J6, 6
HUM Space Humidity switch space switch input J7, 4
Digital Scroll Unloader switch input J7, 6
C.ALM Scroll Compressor Alarm switch input J7, 8
CMP.A Compressor A Feedback switch input J7, 10
FIL.S Filter status switch indoor fan section switch input J9, 2---3
CS.A1 Compressor A1 Current Sensor control box 0---5vdc digital input J9, 10---12
SPT Space temperature (T55/56) space 10k thermistor J8, 1---2
SPTO Space temperature offset (T56) space 10k thermistor J8, 2---3
OAT Outdoor air temperature outdoor coil support 10k thermistor J8, 5---6
SAT Supply air temperature
indoor fan housing, or
supply duct
10k thermistor J8, 7---8
SCT.A Saturated condenser temperature, circuit A outdoor coil, circuit A 5k thermistor J8, 9---10
RAT Return air temperature Return air Section 10k thermistor J8, 13---14
FAN.S Fan status switch indoor fan section switch input J8, 15---16
SSP.A Suction pressure, circuit A compressor A suction
0---5 VDC pressure
transducer
J8, 18---20
OUTPUTS
CTLR Digital Scroll Ctrl Pwr relay J10, 11
CCH Crankcase heat relay relay J10, 13
OFC.1 Outdoor fan 1 relay relay J10, 19
IDF Indoor fan VFD pwr relay relay J10, 21
ALRM Alarm relay relay J10, 23
HT.1 Heat Stage 2 relay relay J10, 25
HT.2 Heat Stage 1 relay relay J10, 27
COMMUNICATION
Local Equipment Network (LEN) communication J5, 1---3
Carrier Comfort Network (CCN) communication J5, 5---7
Network device power 24 VAC J5, 9---10
Scrolling Marquee Display (LEN) communication J4, 1---3
Scrolling Marquee Display power 24 VAC J4, 5---6
Modulation Board (AUX1) LEN communication J3, 1---3
Optional ECB power 24 VAC J2, 1---2
48/
50P
D