Carrier 48AJ - Page 110

110
Table 108 — Valve Control Board (ECB2) Inputs and Outputs
POINT
NAME
POINT DESCRIPTION
I/O POINT
NAME
PLUG AND PIN
REFERENCE
SIGNAL PIN(S) PORT STATE
INPUTS
DI1 J4, 1-2 2 24VAC = 1, 0VAC = 0
DI2 J4, 3-4 4 24VAC = 1, 0VAC = 0
BP Building static pressure AN1 J5, 1-3 1=24VDC, 2=0-20mA in, 3=GND 0-20mA
SP Supply Duct static pressure AN2 J5, 4-6 4=24VDC, 5=0-20mA in, 6=GND 0-20mA
OUTPUTS
SFAN_VFD Supply Fan Inverter speed AO1 J9, 1-2 1=0-20mA, 2=GND 0-20mA OUT
PP/MP J7, 1-3 1=PP/MP Data, 2=24VAC, 3=GND Belimo PP/MP Protocol
RLY1 J8, 1-3 1 = 2 = RLY1A, 3 = RLY1B 1 = Closes RLY1A/RLY1B
RLY 2 J8, 4-6 4 =5 = RLY2A, 6 = RLY2B 1 = Closes RLY2A/RLY2B
RLY 3 J8, 7-9 7 = 8 = RLY3A, 9 = RLY3B 1 = Closes RLY3A/RLY3B
MLV Minimum load valve RLY 6 J8, 16-18 16 = 17 = RLY6A, 18 = RLY6B 1 = Closes RLY6A/RLY6B
ADDRESS DIP
SWITCHES ALL ON
RED LED-
STATUS
GREEN LED-
LEN (LOCAL EQUIPMENT NETWORK)
J2
J1
PWR
J4
LEN LEN
J3
4-POSITION
DIP SWITCH
PWR
1
13
10
7
XDCR/THERM
4
1
J6
J5
7
4
1
3
1
3
1
J8
0-20mA OUT
J7
THERMXDCR/THERM
1
4
13
10
7
RELAYS
J9
CEBD430427 HK50AA032 CEPL130427
Fig. 24 — Staged Gas Heat Control Board (SCB)
A48-7707