QCC Quad Channel Controller

4 channel Controller with logic control for small to medium gas detection applications

Available with Modbus® or BACnet® output for communicating with a BAS, DDC or other control panel


  • Large Parking Facilities
  • Recreation Facilities
  • Food Processing Plants
  • Cold Storage / Freezer Rooms
  • Chemical Storage Rooms
  • and many more...

Key Features

  • Up to 4 channels of gas readings
  • QCC-M offers Modbus® RS-485 digital output signal for LAN and WAN communications
  • QCC-B offers BACnet® MS/TP output signal for WAN communications (for communicating with a BAS)
  • 4 line by 20 character LCD display with LED indicators
  • 3 dry contact relays, 5-amps @240 volts each
  • Optional two 4-20 mA outputs, includes data logging
  • Line Voltage (90-240 VAC)
  • USB port for firmware upgrades
  • Door mounted audible alarm, optional water tight version available
  • Standard water / dust tight, corrosion resistant enclosure (drip proof); IP54 rated with water tight, door mounted audible alarm installed


The QCC Quad Channel Controller offers 4 channels for monitoring toxic, combustible and/or refrigerant gases with versatile control functionality for non-hazardous, non-explosion rated, commercial and light industrial applications. It is designed to accept inputs from up to four remote digital and/or analog transmitters using digital or 4-20 mA analog input.

The QCC is available in two models: the QCC-M with Modbus® RS-485 output or the QCC-B with BACnet® MS/TP output for communicating with a Building Automation System (BAS).

Standard features include, three configurable SPDT dry contact relays with field configurable time delays and trigger levels, an LCD display with LED indicators for channel alarm status, relay status and fault conditions, an extensive menu system with password protection, logic control, a USB port for firmware upgrades and a door mounted, loud audible alarm that is ideal for noisy environments.

Optional value added features include: an analog output module with two analog outputs and data logging, a manual shutoff switch (meets B52 code requirements), a top mounted strobe and a water tight, door mounted audible alarm.

The QCC can be connected to several remote devices such as any of the Remote Strobe & Horns, a QCC-RDM Remote Display Module and the LNK-AO Analog Output Peripheral device.

ABS / Polycarbonate, copper coated interior to reduce RF interference
IP54 rated with optional water tight, door mounted buzzer installed
1.8 kg / 4 lbs
254 x 226 x 113 mm / 10.0 x 8.9 x 4.44 inches
User Interface
4x20 character LCD digital display and LED indicators for “STATUS 1, 2 and 3” and “FAULT”
Manual Shutoff Switch
Optional: Slap button on side of enclosure (for refrigeration applications to meet B52 code requirements)
Modbus® RTU RS-485
4-20 mA analog
Modbus® RTU RS-485
Modbus® RTU RS-485 (model: QCC-M) output to BAS or DDC
BACnet® MS/TP RS-485 (model: QCC-B) output to BAS or DDC
One strobe / horn drive rated 0.5 amps @ 24 V max
Optional: Two internal 4-20 mA analog outputs (if Option -AO is installed), comes with data logging
Three internal SPDT dry contact relays rated 5 amps @ 240 VAC
Audible Alarm
Standard loud, door mounted buzzer, rated 90 dB @ 30 cm (1 ft)
Optional: door mounted, water tight buzzer, rated 85 dB @ 60.96 cm (2 ft)
Top Mounted Strobe
Optional: bright, red, top mounted strobe, 10 - 30 VDC, 13 cm H x 6.1 cm dia / 5.2 inches H x 2.4 inches dia
Power Requirement
Line Voltage: 90 – 240 VAC, 50 -60 Hz, 75 W
Power Distribution
Total power available for Remote & Peripheral Devices and Options 65 W @ 24 VDC
Line Voltage: VAC 3-conductor shielded minimum 18 AWG stranded within conduit
LAN Modbus® RTU (version 1.1b3) RS-485, 16 gauge, 4-conductor shielded
WAN (output to BAS only): Modbus® RS-485 or BACnet® MS/TP, 4-conductor shielded
Thermal, resetting
Operating Temperature
-20°C to 40°C (-4°F to 104°F)
with internal heater
-40°C to 40°C (-40°F to 104°F)
Operating Humidity
15 - 90% RH non-condensing
Conforms to:
CSA-C22.2 No. 205-12, UL508 (Edition 17):2007
EMC Directive 2004/108/EC, EN 50270:2006, Type 1, EN61010
FCC. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
QCC-B, QCC-B-X models are Listed by BTL (where X represents one or more factory installed Options)
RoHS compliant circuit boards
Product Codes
Modbus® WAN Output QCC Controller
BACnet® WAN Output QCC Controller
Factory Options
Two internal Analog Outputs 4-20 mA, includes data logging
Internal heater for cold environment applications down to -40°C / 40°F
Top mounted strobe, red lens, IP65 rated, 6.1 cm dia x 13 cm H / 2.4 in dia x 5.2 in H)
Manual shutoff switch for refrigeration applications
Door mounted, water tight audible alarm, rated 85 dB @ 60.96 cm / 2 ft
Field Options
Analog Output board for adding two internal 4-20 mA analog outputs plus data logger to the QCC, install in the field by qualified technician only or send back to factory for installation
CETCI BACnet Module for converting QCC-M WAN communication from Modbus® to BACnet®, installed in the field
Compatible Analog (4-20 mA) Transmitters
LPT Series
Single channel analog gas detector for monitoring carbon monoxide, nitrogen dioxide, ammonia, chlorine, ozone or oxygen
LPT-A series
Single channel analog gas detectors for monitoring many different toxic, combustible or refrigerant gases
CXT-A series
Single channel, analog explosion proof gas detectors for monitoring toxic or combustible gases in hazardous-rated areas
Single channel analog infrared CO2 gas detector with 0 - 5% vol measurement range
NOTE: The QCC is not compatible with CGAS-A-CO2-5K or CGAS-AP-CO2-5K
Compatible Digital (Modbus® RS-485) Transmitters
CGAS-D Detector Series
2 channel, digital gas detectors for monitoring many different toxic, combustible or refrigerant gases. NOTE: The QCC is not compatible with CGAS-D-CO2-5K or CGAS-DP-CO2-5K
LPT-P series
3 channel, digital gas detectors for monitoring CO, NO2 and combustible gases
LPT-M series
3 channel, digital gas detectors for monitoring many different toxic, combustible or refrigerant gases
Remote & Peripheral Devices
Analog Output Peripheral Device that adds four 4-20 mA outputs, Modbus® RS-485 communication
Network Extender Peripheral Device to extend the Modbus® RS-485 BUS wire length
Remote Display for alternate location viewing of gas level readings
Remote Relay that adds four relay outputs, rated 5A @ 240 volts each, Modbus® RS-485 communication
Remote Power Supply to provide power to extend the network of remote and peripheral devices
Remote LED strobe light with audible, red lens, 8.9 cm / 3.5”, comes with mounting bracket
Remote Horn/Strobe Combo, unmounted, 24 VAC/VDC, rated 99 dB @ 3 m (10 ft) (VAC), 97 dB @ 3 m (10 ft) (VDC), amber lens
Remote Horn/Strobe Combo, unmounted, 24 VAC/VDC, rated 99 dB @ 3 m (10 ft) (VAC), 97 dB @ 3 m (10 ft) (VDC), blue lens
Remote Horn/Strobe Combo, unmounted, 24 VAC/VDC, rated 99 dB @ 3 m (10 ft) (VAC), 97 dB @ 3 m (10 ft) (VDC), red lens

Options, Accessories and More...