Orion System VCM Controller - Manual (Page 22)

Technical Guide
VCM Controller 22
Input/Output Wiring Details
Binary Inputs Wiring
All Binary Inputs are to be wired as 24 VAC wet contact closures. Only
24 VAC power must be supplied to the OE356 Binary Input Board
through a Normally Open Contact closure in order for the signal to be
recognized by the controller. If a Dry Contact closure is used , it will
not work. See Figure 19 for detailed wiring.
OE352 or OE353 Expansion Base Board
24
V
A
C
GND
10 VA Minimum Power Required For
Each 2 Slot Expansion Base Board.
20 VA Minimum Power Required For
Each 4 Slot Expansion Base Board
R20
C8
TB2
D3
PWR LD1
24V
AC-IN GND GND
TB1
PJ2
+24VDC-OUT
R17
PJ1
R15
Connect To VCM Controller
Connect To Next Expansion Base Board
(When Used)
R4
R3
R2
R1
YS101788
BIN 4
BIN 3
BIN 2
BIN 1
COM
TB1
OPTO2
R10
R12
4 DIG. IN MOD. I/O BD.
P2506-2
R8
R6
R5
P2506-2
OPTO1
74HC14N PCF8574P
U2 C4
C3
U1
CX2
C2
C1
CX1
P1
R4
R3
R2
R1
YS101788
BIN 4
BIN 3
BIN 2
BIN 1
COM
TB1
OPTO2
R10
R12
4 DIG. IN MOD. I/O BD.
P2506-2
R8
R6
R5
P2506-2
OPTO1
74HC14N PCF8574P
U2 C4
C3
U1
CX2
C2
C1
CX1
P1
OE356
-4
Binary
Input
Board
#1
OE356
-4
Binary
Input
Board
#2
Remote Forced Heating - N.O. Contact
Remote Forced Cooling - N.O. Contact
Exhaust Hood On - N.O. Contact
Dirty Filter - N.O. Contact
Proof Of Flow - N.O. Contact
Remote Forced Occupied - N.O. Contact
Smoke Detector - N.C. Contact
Remote Forced Dehumidification - N.O. Contact
COM
BIN4
BIN3
BIN2
BIN1
COM
BIN3
BIN4
BIN1
BIN2
WARNING!!
Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC. Failure to observe
polarity will result in damage to one or more of the boards. Expansion Boards must be wired in such a way that
power to both the expansion boards and the controller are always powered together. Loss of power to the
expansion board will cause the controller to become inoperative until power is restored to the expansion board.
Figure 19: Binary Inputs Wiring
Warning: Do not apply any voltage greater than 24 VAC to
the Binary Input Expansion boards. Higher voltages
will damage the expansion Board and possibly
other components on the system.