BACnet Application Controller - Delta Controls

The DAC-322 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 designed for a wide-range of applications that have small local I/O requirements. It also supports BACstats and other Delta LINKnet devices.


The DAC-322 is suitable for controlling various packaged units and equipment with small I/O requirements such as Fan Coil units, Unit Ventilators and Heat Pumps.

The fully programmable DAC-322 can be tailored to specific applications by creating and modifying BACnet objects and GCL+ programs.


  • Native BACnet firmware
  • BACnet MS/TP communications
  • Supports 4 BACstat network sensors on LINKnet for room sensing and control or 2 Delta Field Modules on LINKnet for I/O expansion
  • Actuator power terminal (24VAC) for each analog output
  • Easy to mount housing
  • Fully programmable in GCL+
  • Application database can be flash loaded over the network
  • Controller firmware can be flash loaded over the network
  • Supports Modbus capability via flash loading in the field
  • Supports flash loading Modbus upgrades via hardware key
  • Derived Network Addressing (DNA) for simple integration into a standard network architecture
  • Service port

BACnet Device Profile

BACnet Advanced Application Controller (B-AAC)

Inputs - External

3 Universal inputs - 10 bit (supporting 0-5v, 0-10v, 10kΩ, 4-20mA)

Outputs - External

2 Binary triac outputs

2 Analog outputs (0-10V)

Jumper selection for internal or external power on binary outputs

LED status indication of each output


32-bit processor

1 MB (8 megabit) Flash memory

127 KB SRAM memory for database

LED indication of CPU and SCAN status

Device Addressing

Set via DIP switch and jumpers, or software setup

Communications Ports


BACnet MS/TP @ 9600, 19200, 38400 or 76800 bps (default) (maximum of 99 devices per BACnet MS/TP segment)


Delta LINKnet @ 76800 bps (maximum 4 devices on LINKnet, with no more than 2 DFM devices)


Removable screw-type terminal connectors

Wiring Class

Class 2


24 VAC

10VA, 34VA maximum with fully loaded BO’s


32° to 131°F (0° to 55°C)

10 - 90% RH (non-condensing)


7 5/8 x 4 x 1 7/8 (19.2 x 10.2 x 4.8 cm) with housing

0.551 lb. (250 g) with housing





C-UL Listed

UL 916 Listed

BTL Listed

  • MS/TP Application Controllers (DAC)