QCS-2424 System Controller

COSYS Building Controls



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

The QCS-2424 is a fully programmable, Native BACnet™ Building Controller replacement for the Intelli-Con Turbo Panel. It communicates using BACnet IP, BACnet over Ethernet or on an RS-485 LAN using the BACnet MS/TP protocol. The QCS-2424 shares the same physical footprint, I/O expansion cards, and Zone Controller Protocol as the Intelli-Con Turbo.


  • Native BACnet firmware
  • V2 Intelli-Con Turbo, Intelli-Con and Intelli-Con Plus replacement controller
  • Flexible input/output configuration using universal I/O points and Intelli-Con expansion cards
  • Provides up to 96 I/O points
  • V3 Communications: BACnet IP, BACnet over Ethernet, BACnet MS/TP or BACnet PTP
  • V2 Communications: Zone Controller Protocol
  • Fully programmable in GCL+
  • Firmware can be flash loaded over the network
  • Hand/Off/Auto switches with position feedback
  • Tri-color LED’s to indicate output status


The QCS-2424 is suitable for controlling equipment such as AHUs, Boilers, Chillers and a variety of HVAC control systems.

Because of its programming capability, the QCS-2424 can be used to create or modify GCL+ programs and BACnet objects for specific applications.


24 Universal inputs - 10 bit (supporting 0-5V, 0-10V, 10KΩ 4-20 mA)
LED status indication per input

24 Analog outputs (0-10V) software configured as analog or binary
LED status indication per output

Expansion I/O
3 Expansion slots (8 or 16 I/O points per slot), input or output boards available

32-bit processor
2 MB (16 megabit) Flash memory
512 KB SRAM memory
Real-time clock
SuperCap backup of clock and SRAM

Twisted-Pair Ethernet
(10-BaseT) @ 10 MB, BACnet IP, BACnet over Ethernet
V2 Zone Protocol (NET1)
Intelli-Con Zone Protocol 38400 bps
(maximum 90 devices)
Main LAN (NET2)
BACnet MS/TP 9600, 19200, 38400 or 76800 bps (default) (maximum 99 devices per BACnet MS/TP segment)
Serial RS-232 BACnet PTP 9600, 19200 or 38400 bps

Device Type
Configured as either an Area, System or Subnet device

Device Addressing
Set via DIP switch or software setup

Wiring Class
Class 2

24 VAC with LED status indication
50 VA

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

15.1 x 11.1 in. (38.4 x 28.2 x
6.4 cm)
2.20 lb. (1 kg)



Order the QCS-2424 with the desired options according to the following product numbers:

QCS-2424 4   Inputs, 24 Outputs, Intelli-Con Zone Protocol, BACnet over Ethernet, BACnet MS/TP, HOA switches with feedback