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24VAC to Controller
Room RH
CO2 Sensor
After Cold Coil Temperature Sensor
Sensor B1, B2, B3 Commons
Supply Discharge Temperature Sensor
Outdoor Air Temperature Sensor
24VAC for Analog Outputs
Outdoor Air Damper Analog Output
Heating Analog Output
Cooling/VSC Cond Fan Analog Output
Hot Gas Reheat Analog Output
Supply Fan Proving
Wheel Pressure Limit
Wheel Rotation Alarm
Unit On/Off Input
Exhaust Fan Proving
Occupied/Unoccupied Input
Dirty Filter Input
Outdoor Relative Humidity Sensor
Building Pressure Sensor
Duct Pressure Sensor
Compressor Limit Circuit A
Compressor Limit Circuit B
Compressor Limit Circuit C
Compressor Limit Circuit D
Supply Fan VFD Output
Exhaust Fan VFD Output
Room Temperature Sensor
Discharge Pressure Circuit B (VSC)
2 Speed Fan Input
2 Position Damper Input
8
Microprocessor Controller for DOAS
Large Controller Overview
G
G0
+V
term
GND
+5 V
REF
U1
U2
U3
GND
+VDC
U4
GND
U5
GND
VG
VG0
Y1
Y2
Y3
Y4
ID1
ID2
ID3
ID4
ID5
ID6
ID7
ID8
ID15H
IDC1
ID15
IDC15
U6
ID16
U7
ID16H
U8
GND
ID9
ID10
ID11
ID12
Y5
IDC9
Y6
ID13H
U9
ID13
GND
IDC13
U10
ID14
GND
ID17
ID14H
ID18
IDC17
Optional LonWorks cards are
located in BMS Card port.
Optional BACnet IP, Modbus TCP, Web UI, Ethernet Connections
24 VAC When Unit On
C1
Wheel Frost Mode
NO1
Supply Fan Enable
NO2
Exhaust Fan Enable
NO3
C1
24 VAC from Supply Fan Proving
C4
Heating Enable
NO4
Staged Compressor 1
NO5
Staged Compressor 2
NO6
C4
24 VAC
C7
Economizer Mode/Output to Dampers
NO7
C7
NO14
C14
NO8
Alarm Dry Contact
NC14
C8
NO15
NC8
C15
NC15
C9
Staged Compressor 3
NO9
C16
Staged Compressor 4
NO10
NO16
Energy Recovery Wheel Enable
NO11
NO17
C9
NO18
C16
Inverter Compressor E-Stop (VSC)
NO12
C12
NC12
NO13
C13
NC13
Optional Modbus RTU/BACnet MSTP connections
are made to the J26 FBus2 terminal.
Remote Display
• Six conductor RJ25 cable
• Connects to J10
Compressor Fan 1 Enable (VSC)
Compressor Fan 2 Enable (VSC)
®
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