The DFC-322R3-240 is a fully programmable, Native BACnet™ Advanced Application Controller that communicates on an RS-485 LAN using the BACnet MS/TP protocol. Direct 240 VAC line voltage terminal connections are provided for 1, 2 or 3 speed fans. Room temperature can be a standard 10KΩ sensor or BACstat II, connected via a secondary LINKnet network and a 24 VAC power out connection.


The DFC-322R3-240 is designed for fan coil control. With 2 triac outputs and 2 analog 0-10v outputs, it covers a wide-range of fan coil unit applications. The DFC-322R3-240 allows for sequence modifications as required by the design engineer or building owner. It provides simple, easy-to-install fan coil control solutions for office buildings, hotels or residential buildings.


  • Native BACnet firmware
  • BACnet MS/TP communications
  • Stand alone operation or on BACnet
  • Fully programmable in GCL+
  • Pre-loaded fan coil application database
  • Direct connection to BACstat II (DNS-24 or DNS-L24)
  • 2 tri-state and 2 analog outputs for relay actuation
  • 3 relays rated for motor loads to control 1-, 2- or 3- speed fans, complete with interlocks and time delays for equipment protection
  • Slim design fits into narrow fan coil units
  • Power supplied by power mains (on-board 24 VAC transformer included)
  • Derived Network Addressing (DNA) for simple integration into a standard network architecture
  • Service port

BACnet Device Profile

BACnet Advanced Application Controller



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

1 10kΩ or dry contact input - 10 bit


2 Analog outputs (0-10v)

2 Binary triac outputs

3 Binary relay outputs for fan speed control

240 VAC, 1HP (60 LRA/10 FLA)

LED status indication of each output


1 MB (8 megabit) Flash memory

127 KB SRAM memory for database

CPU status LED

Device Type

Pre-configured as a subnet device

Device Address

Set via DIP switch and jumpers or software setup

Communication 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/DNT devices per controller)

Note: On board transformer only provides enough power for 1 BACstat


Fixed screw-type terminal connectors (Class 1)

Removable screw-type connectors (Class 2)

Wiring Class

NEC Class 1 (power in)

NEC Class 2, SELV (power out)


Power In

240 VAC, 50/60 Hz

2000 VA maximum

(30 VA for internal circuitry)

Power Out (for DNS-24L)

24 VAC, 50/60 Hz, 3 VA


0o to 45o C (32o to 113o F)

10 to 90% RH (non-condensing)


24.13 cm x 10.0 cm x 6.96 cm

(9.5 x 3.94 x 3.75 in.)

955 g (2.1 lb.)


CE—EMC Directive 89/336/EEC

& IEC 61010-1

FCC Class B

ICES Class B

  • Fan Coil Controllers (DFC)