109
Table 107 — Economizer Control Board (ECB1) Inputs and Outputs
POINT
NAME
POINT DESCRIPTION
I/O POINT
NAME
PLUG AND PIN
REFERENCE
SIGNAL PIN(S) PORT STATE
INPUTS
RMTIN Remote occupancy DI1 J4, 1-2 2 24VAC = 1, 0VAC = 0
ECONENBL,
ECOORIDE
Economizer enable DI2 J4, 3-4 4 24VAC = 1, 0VAC = 0
RARH Return air relative humidity AN1 J5, 1-3 1=24VDC, 2=0-20mA in, 3=GND 0-20mA
OARH Outdoor air relative humidity AN2 J5, 4-6 4=24VDC, 5=0-20mA in, 6=GND 0-20mA
OUTPUTS
ECONOCMD
Economizer actuator
(analog control)
AO1 J9, 1-2 1=0-20mA, 2=GND 0-20mA OUT
ECONOCMD
Economizer actuator
(digital control)
PP/MP J7, 1-3 1=PP/MP Data, 2=24VAC, 3=GND Belimo PP/MP Protocol
PE_A Power Exhaust stage A RLY1 J8, 1-3 1 = 2 = RLY1A, 3 = RLY1B 1 = Closes RLY1A/RLY1B
PE_B Power Exhaust stage B RLY 2 J8, 4-6 4 =5 = RLY2A, 6 = RLY2B 1 = Closes RLY2A/RLY2B
PE_C Power Exhaust stage C RLY 3 J8, 7-9 7 = 8 = RLY3A, 9 = RLY3B 1 = Closes RLY3A/RLY3B
ECON_PWR Economizer Power RLY 6 J8, 16-18 16 = 17 = RLY6A, 18 = RLY6B 1 = Closes RLY6A/RLY6B
Fig. 23 — Economizer Control Board (ECB1) and VAV Control Board (ECB2)
A48-7706
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