QCA-V223 Application Controller

COSYS Building Controls


Our COSYS Application and System Controls work along with our enterprise software platform OspreyFMS to provide a meaningful context.

The QCA-V223 is a fully programmable, Native BACnet® Advanced Application Controller that communicates on an RS-485 LAN using the BACnet MS/TP protocol. This controller is specifically designed for VAV applications and supports LINKnet I/O. The damper actuator assembly is available with or without position feedback. Additional inputs and outputs can be configured as required.


  • Native BACnet firmware
  • BACnet MS/TP communications
  • Supports 4 BACstat network sensors on LINKnet for room sensing and control or 2 Field Modules on LINKnet for I/O expansion
  • Integrated housing with damper assembly for easy, cost-effective installation
  • Reliable industry standard actuator
    (with optional position feedback)
  • Fully programmable in GCL+
  • True differential pressure sensor
  • LED indicator for each output, communication port and SCAN status
  • Application database and firmware can be flash loaded over the network
  • Optional field upgrade to Modbus® RTU with hardware key
  • Service port


The QCA-V223 is an application-specific controller for VAV and includes an actuator and true differential pressure sensor with integrated housing.
The fully programmable QCA-V223 allows GCL+ programs and BACnet objects to be tailored to any VAV application.


BACnet Device Profile
BACnet Advanced Application Controller (B-AAC)

External Inputs
2 Universal Inputs (10-bit) supporting:
0-5 VDC
0-10 VDC
10 kΩ Thermistor
Dry Contact (using 10 kΩ Thermistor jumper setting)
4-20 mA

1 10K Thermistor or Dry Contact

Internal Inputs
1 Actuator position feedback (optional) 1 Air flow sensor, true differential pressure, 0 to 1 in H2O (0 to 248.8 Pa)

External Outputs
2 Binary TRIAC Outputs
2 Analog Outputs (0-10 VDC, 8-bit)

Internal Outputs
2 Binary Outputs for damper open and close

Siemens Acutator
44 in-lbs. (nominal torque)
Less than 35 db (A) noise level

Belimo Actuator
45 in-lbs. (nominal torque)
Less than 35 db (A) noise level

Device Addressing
Set via DIP switches and jumpers, or software setup

Removable screw-type terminal connectors

Wiring Class
Class 2

Flow sensor tubing must be ⁵⁄₃₂ in. inside diameter

24 VAC 50/60 Hz @ 15 VA (not including output loading; 32 VA max with fully loaded TRIAC Outputs)

16-bit processor
1 MB (8-megabit) flash memory
128 KB SRAM memory for database

Communications Ports
Main LAN
RS-485 NET1
BACnet MS/TP up to 76800 bps, max 99 devices per port

RS-485 NET2
LINKnet up to 76800 bps, max 4 devices on LINKnet
Optional Modbus up to 68400 bps, max 5 devices

32° to 131°F (0 to 55°C)
10 to 90% RH (non-condensing)

9⅜ x 4¾ x 3⅛ in. (23.9 x 12.0 x 8.0 cm) with housing

1.85 lb. (840 g) with housing and actuator



Order the QCA-V223 application controller according to the following product numbers:

QCA-V223 Analog board (2 AOs, 2 BOs), DP sensor for flow, integrated housing