55
Table 23 – Main Base Board (MBB) Connections
DISPLAY NAME SENSOR LOCATION I/O TYPE POINT NAME
CONNECTION PIN
NUMBER
INPUTS
Input power from TRAN2 Control Box 24 VAC J2, 1 and 8
COFS Dain Pan 24 VAC COFS J 4 , 1 --- 4
FIRE SHUTDOWN Supply/Return/Space Switch input FIREDOWN J 5 , 1 --- 4
IGC FAN REQUEST Gas section Switch input IGC_IFO J 6 , 1 --- 2
IAQ LEVEL Return/Space 0 --- 2 0 m A IAQ J7,1,5---6
OARH LEVEL Economizer 0 --- 2 0 m A OARH J7,2,6---7
ECON ACT POSITION Economizer 2 --- 1 0 v d c DAMPPOS J7,3,8
FAN SUPPLY TEMP Indoor fan deck 10k thermistor FST J8,1,4
RETURN AIR TEMP Return 10k thermistor RAT J8,2,5
OUTDOOR AIR TEMP Outdoor coil 10k thermistor OAT J8,3,6
CIR.A SUC. PRESS Circuit A Suction pipe 0--- 5 VDC pressure transducer SSP_A J 9 , 1 --- 2 , 5
CIR.A DIS. PRESS Circuit A Discharge pipe 0--- 5 VDC pressure transducer SDP_A J 9 , 4 --- 3 , 6
Configurable 0 --- 2 0 m A T B 5 , 4 --- 6
SLIDER OFFSET VAL Space 10k thermistor SPTO T B 5 , 2 --- 3
SPACE TEMPERATURE Space 10k thermistor SPACE_T T B 5 , 1 --- 2
CIR.A HPS Circuit A Discharge pipe Switch Input CIRA_HPS QC, 1--- 2J18, 1, 3
IDF LIMIT SWITCH Indoor Fan Switch Input IDF_LSM QC, 3--- 4J18, 2,4
FILTER STATUS SW FIOP/Field--- installed Switch Input FILTSAT TB 3 , 1 --- 2
Configurable F i e l d --- i n s t a l l e d Switch Input T B 3 , 3 --- 4
PHASE MONITOR SW Control Box Switch Input PWR_STAT T B 3 , 5 --- 6
TSTAT G INPUT Space Switch Input G TB1, G
TSTAT Y1 INPUT Space Switch Input Y1 TB1, Y1
TSTAT Y2 INPUT Space Switch Input Y2 TB1, Y2
HUMIDISTAT F i e l d --- i n s t a l l e d Switch Input HUMDSTAT TB1, Y3
TSTAT W1 INPUT Space Switch Input W1 TB1, W1
TSTAT W2 INPUT Space Switch Input W2 TB1, W2
OUTPUTS
Optional power out Not Used 24 VAC J 1 , 1 --- 2
ECON CMD POSITION 0 --- 2 0 m A DAMPCMD J7,4,8
COMMANDED IDF RPM Indoor fan section PWM1 FSPD_RPM J 10, 1--- 4
not used PWM2 J11, 1--- 4
not used PWM3 J12, 1--- 4
ALARM RELAY Relay 11 ALMOUT T B 2 , 3 --- 4
ODF SPEED RELAY Not Used Relay 10 OFR J3A, 1, 3
COMP A LOADER Not Used Relay 9 COMP_ALD J3A, 2, 4
CCH RELAY Not Used Relay 8 CCHR1 J3B, 1, 3
COMPRESSOR A1 Not Used Relay 7 COMP_A1 J3B, 2, 4
PE1 RELAY Relay 6 PE1 J 3 C , 1 --- 4
RH DISCH VALVE Relay 5 RDV_A J3D, 1, 4
RH LIQUID VALVE Relay 4 RLV_A J3D, 2, 5
COOL LIQUID VALVE Relay 3 CLV_A J3D, 3, 6
HEAT 2 RELAY Relay HEAT_2 J3E, 1, 3
HEAT 1 RELAY Relay HEAT_1 J3E, 2, 4
COMMUNICATION
Building Automated System (BAS) Building Communication T B 4 , 1 --- 5
Ethernet Not Used Communication J13, J14
Expansion LEN Bus Not Used Communication J15, 1--- 4
Expansion LEN Bus Not Used Communication J16, 1--- 4
Local Equipment Network (LEN) Communication J17
RNET Sensors Building Communication J20, 1--- 4
Display Copper Cable Communication J23
RNET Service Access Communication J24, 1--- 5
DISPLAY CONNECTIONS
Display Copper Cable Communication J1
Local Equipment Network (LEN) Communication J2
U S B --- A Communication J3
U S B --- B Not Used Communication J4
Keypad Ribbon Cable Communication J6
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