Carrier WEATHERMAKER 48A2020 - Page 128

128
Table 105 — Controls Expansion Board (CEM) Inputs
POINT
NAME
POINT DESCRIPTION
I/O POINT
NAME
PLUG AND PIN
REFERENCE
SIGNAL PIN(S) PORT STATE
INPUTS
SFS Supply Fan Status switch DI 1 J7, 1-2 2 0 = 24vac, 1= 0vac
DMD_SW1 Demand Limit - SW1 DI 2 J7, 3-4 4 0 = 24vac, 1= 0vac
DMD_SW2/
DHD ISCIN
Demand Limit - SW2/
Dehumidification Switch Input
DI 3 J7, 5-6 6 0 = 24vac, 1= 0vac
PRES Pressurization DI 4 J7, 7-8 8 0 = 24vac, 1= 0vac
EVAC Evacuation DI 5 J7, 9-10 10 0 = 24vac, 1= 0vac
PURG Purge DI 6 J7, 11-12 12 0 = 24vac, 1= 0vac
IAQIN Indoor Air Quality Switch DI 7 J7, 13-14 14 0 = 24vac, 1= 0vac
AN7 J6, 1-3 2 (1 = loop power) (0 to 20mA input)
DMDLMTMA 4-20mA Demand Limit AN8 J6, 4-6 5 (4 = loop power) (0 to 20mA input)
EDTRESMA 4-20mA Evaporator Discharge SP Reset AN9 J6, 7-9 8 (7 = loop power) (0 to 20mA input)
OAQ Outside Air CO
2
Sensor AN10 J6, 10-12 11 (10 = loop power) (0 to 20mA input)
SPRESET SP Reset milliamps AN10 J6, 10-12 11 (10 = loop power) (0 to 20mA input)
CEM_10K1/
CEM_4201
CEM AN1 10k temp J5,1-2/
CEM AN1 4-20 ma J5,1-2
AN1 J5, 1-2 1 (thermistor, ohms)
CEM_10K2/
CEM_4202
CEM AN2 10k temp J5,3-4/
CEM AN2 4-20 ma J5,3-4
AN2 J5, 3-4 3 (thermistor, ohms)
CEM_10K3/
CEM_4203
CEM AN3 10k temp J5,5-6/
CEM AN3 4-20 ma J5,5-6
AN3 J5, 5-6 5 (thermistor, ohms)
CEM_10K4/
CEM_4204
CEM AN4 10k temp J5,7-8/
CEM AN4 4-20 ma J5,7-8
AN4 J5, 7-8 7 (thermistor, ohms)
AN5 J5, 9-10 9 (thermistor, ohms)
AN6 J5, 11-12 11 (thermistor, ohms)
Fig. 33 — Controls Expansion Board (CEM)
CEBD430351
TEST 1
CEPL130351-01
PWR
TEST 2
J1
J2
J4 J3
J5
J6
J7
LEN
STATUS
RED LED - STATUS
GREEN LED -
LEN (LOCAL EQUIPMENT NETWORK)
ADDRESS
DIP SWITCH (ALL ON)