56
Table 24 – 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 & 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
RARH LEVEL Return/Space 0 --- 2 0 m A RARH 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 housing 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
IAQ LEVEL Return/Space 0 --- 2 0 m A IAQ T B 5 , 4 --- 6
SLIDER OFFSET VAL Space 10k thermistor SPTO T B 5 , 2 --- 3
SPACE TEMPERATURE Space 10k t hermistor SPACE_T T B 5 , 1 --- 2
CIR.A HPS Circuit A Discharge pipe Switch Input CIRA_HPS QC, 1--- 2J18, 1, 3
Configurable F i e l d --- i n s t a l l e d Switch Input QC, 3--- 4J18, 2,4
REMOTE OCC SWITCH F i e l d --- i n s t a l l e d Switch Input REMOCC T B 3 , 1 --- 2
REMOTE SHUTDOWN F i e l d --- i n s t a l l e d Switch Input REMSHUT T B 3 , 3 --- 4
FILTER STATUS SW Indoor fan section Switch Input FILTSTAT 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
TSTAT Y3 INPUT Space Switch Input Y3 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
ODF SPEED OUT 1 PWM1 ODF1SPD J10, 1--- 4
ODF SPEED OUT 2 PWM2 ODF2SPD J11, 1--- 4
ODF SPEED OUT 3 PWM3 ODF3SPD J12, 1--- 4
ALARM RELAY Relay ALMOUT T B 2 , 3 --- 4
not used Not Used Relay J3A, 1, 3
not used Not Used Relay J3A, 2, 4
not used Not Used Relay J3B, 1, 3
not used Not Used Relay J3B, 2, 4
PE1 RELAY Relay PE1 J 3 C , 1 --- 4
CCH RELAY Relay CCHR1 J3D, 1, 4
COMPRESSOR A2 Relay COMP_A2 J3D, 2, 5
COMPRESSOR A1 Relay COMP_A1 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
IDF SPEED OUTPUT Indoor fan section Communication FANSPEED J15, 1--- 4
Expansion LEN Bus Not Used Communication J16, 1--- 4
Local Equipment Network (LEN) Communication J17
RNET Sensors Building Communication J 20, 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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