Orion System VCM-X Modular E-BUS - Manual (Page 18)

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Zone
INSTALLATION & WIRING
VCM-X Modular E-BUS Controller Technical Guide 18
Supply Fan VFD Signal or Zoning
Bypass Damper Actuator Signal
The Supply Fan VFD or Zoning Bypass Damper Actuator Signal is a
0-10 VDC output. This signal output can be connected to the Supply
Fan Variable Frequency Drive to modulate the Supply Fan speed and
control Duct Static Pressure utilizing the Duct Static Pressure Sensor
connected to the VCM-X E-BUS Controller. Alternatively, it can be
connected to a Zoning Bypass Damper Actuator that will modulate the
Zoning Bypass Damper Actuator to control Duct Static Pressure utiliz-
ing the Duct Static Pressure Sensor connected to the VCM-X E-BUS
Supply Fan VFD Signal and Zoning Bypass Damper Actuator
Controller. A Duct Static Pressure Sensor must be connected in order
for the VFD or Zoning Bypass Damper Actuator to operate. See Figures
14 and 15 below for detailed wiring.
Caution: Variable Frequency Drive units can cause large transient
noise spikes which can cause interference to be propagated on other
electronic equipment. Use shielded wire wherever possible and route
all sensor and controller wiring away from the Variable Frequency
Drive and the HVAC Unit electrical wiring.
Figure 15: Zoning Bypass Damper Actuator Wiring
+
Supply Fan Variable Frequency Drive
(By Others)
_
0-10VDC Input From AO2
Shield
GND
Caution:
The VFD Unit Must Be Configured For 0-10 VDC Input.
The Input Resistance At The VFD Must Not Be Less
Than 1000 Ohms When Measured At The VFD
Terminals With All Input Wires Removed.
Note:
Wire To The VFD Using 18 GA Minimum 2
Conducter Twisted Pair With Shield Cable.
Wire Shield To GND As Shown
AO2
GND
Shield
VCM-X E-BUS Controller
AI1
AI1 SET
AI2 SET
AI3 SET
AI4 SET
AI5 SET
AI7 SET
AI2
AI3
AI4
AI5
AI7
Bypass Damper Actuator
(Belimo Actuator Shown)
0-10 VDC
24 VAC Power Source
Sized For Actuator VA Load
GND
24 VAC
3 (Y)
5 (U)
2 (+)
1 (-)
Belimo Actuator Wiring
Shown. Consult Factory For
Other Manufacturer Wiring
Instructions
VCM-X E-BUS Controller
GND
AO2
AI1
AI1 SET
AI2 SET
AI3 SET
AI4 SET
AI5 SET
AI7 SET
AI2
AI3
AI4
AI5
AI7
Figure 14: Supply Fan VFD Wiring