System Sensor CO1224T - 4-Wire CO Detector Data Sheet

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System Sensor CO1224T
System Sensor CO1224T
4-wire CO Detector
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Agency Listings
CO1224T and
Carbon Monoxide
with RealTest
The System Sensor CO1224T and CO1224TR (round)
Carbon Monoxide (CO) Detectors use a highly accurate
and reliable electrochemical sensing cell to provide early
warning of dangerous CO levels.
• RealTest® enables a functional test using canned CO
• Full compliance with UL 2075
• A code-required trouble relay
• Wiring supervision with SEMS terminals
• A six-year end-of-life timer
• 12/24 VDC
• A low current draw of 20 mA in standby and 40 mA in alarm
• Versatile mounting for wall and ceiling
• Accurate and reliable electrochemical sensing technology
• Optional CO-PLATE CO Detector Replacement Plate to upgrade
previously installed competitor detectors to the CO1224T
With RealTest
technology, the CO gas sensing cell used in
the CO1224T and CO1224TR CO detectors can be tested using a
CO gas agent, fully meeting the requirements of NFPA 720: 2009.
Simply put the detector into RealTest mode, spray a small amount
of CO into the detector per the installation instructions, and within
seconds the detector will alarm, indicating successful gas entry. (See
the reverse page or the user manual for complete instructions.)
When dangerous amounts of CO are detected, the CO1224T and
CO1224TR detectors alert residents by sounding and flashing a
temp 4 signal alarm. With 24/7 central station monitoring, residents
are guaranteed protection whether they are away from home,
sleeping, or already suffering from the effects of CO.
The CO1224T and CO1224TR are designed for system operation.
These detectors are fully listed to UL 2075 and offer a code-
required trouble relay to send a sensor failure or end-of-life signal
to the control panel and the central station. The CO1224T and
CO1224TR also use SEMS-type terminal Philips head screws for
quicker and more positive wiring connections and code-required
wiring supervision. With a low current draw, these detectors enable
more devices to be connected to the panel, limiting the need to
purchase extra power supplies or more expensive panels. As 12/24
VDC detectors, the CO1224T and CO1224TR will operate on most
industry security and fire alarm control panels.
E307195 E304075
3825 Ohio Avenue • St. Charles, IL 60174
Phone: 800-SENSOR2 • Fax: 630-377-6495
©2012 System Sensor.
Product specifications subject to change without notice. Visit
for current product information, including the latest version of this data sheet.
CODS72701 • 9/15
Ordering Information
Part No. Description
CO1224T 12/24 volt, 4-wire system-monitored carbon monoxide detector with RealTest® Technology
CO1224TR 12/24 volt, 4-wire system-monitored round carbon monoxide detector with RealTest® Technology
CO-PLATE CO detector replacement plate to cover the footprint of previously installed competitive detectors as necessary
CO1224T and CO1224TR Carbon Monoxide Detector Specifications
Architectural/Engineering Specifcations
Carbon monoxide (CO) detector shall be a system-connected System Sensor model number CO1224T or CO1224TR listed to Underwriters
Laboratories UL 2075 for Gas and Vapor Detectors and Sensors. The detector shall be equipped with a sounder and a trouble relay. The
detector’s base shall be able to mount to a single-gang electrical box or direct (surface) mount to the wall or ceiling. Wiring connections shall
be made by means of SEMS screws. The detector shall provide dual-color LED indication that blinks to indicate normal standby, alarm, or
end-of-life. When the sensor supervision is in a trouble condition, the detector shall send a trouble signal to the panel. When the detector gives
a trouble or end-of-life signal, the detector shall be replaced. The detector shall provide a means to test CO gas entry into the CO sensing
cell. The detector shall provide this with a test mode that accepts CO gas from a test agent and alarms immediately upon sensing CO entry. The
detector shall perform in the detection of CO up to 12,000 feet above sea level and alarm within the time specified by ANSI/UL 2034 for CO
concentrations of 70, 150 and 400 parts per million (ppm), as verified by a Nationally Recognized Test Laboratory.
Electrical Specifcations
Operating Voltage 12/24 VDC
Audible Signal 85 dB in alarm
Standby Current 20 mA
Alarm Current 40 mA (75 mA test)
Alarm Contact Ratings 0.5 A @ 30 VDC
Trouble Contact Ratings 0.5 A @ 30 VDC
Physical Specifcations
Size: CO1224T Length: 5.1 in, Width: 3.3 in, Height: 1.3 in
CO1224TR Diameter: 6 in, Height: 1.3 in
Approximate Weight CO1224T: 7 oz ; CO1224TR: 11 oz
Operating Temperature Range 32°F to 104° F (0°C to 40° C)
Operating Humidity Range 22 to 90% RH
Input Terminals 14 to 22 AWG
Mounting Single-gang back box; surface mount to wall or ceiling
Operation Modes
Operation Mode Green LED Red LED Sounder
Normal (standby) Blink 1 per minute — —
Alarm — Blink in temp 4 pattern Sound in temp 4 pattern
Feature: The System Sensor CO1224T and CO1224TR Carbon Monoxide Detectors with RealTest

enable evaluation of

functionality of the CO sensing cell using a canned CO test agent.
Hush Feature: Pushing the Test/Hush button will silence the sounder for 5 minutes (except in RealTest mode).
Trouble Feature: When the detector is in a trouble condition, it will send a trouble signal to the panel.
End-of-Life Timer: After the detector’s internal sensor has reached the end of its life, a trouble signal will be sent to
the panel to indicate it is time to replace the detector. An electrochemical CO detector lifespan is
about six years. The detector must be replaced by the date marked on the inside of the product.
CO-PLATE: System Sensor also offers the CO-PLATE CO Detector Replacement Plate to cover the footprint (when
necessary) of previously installed competitive carbon monoxide detectors that require replacement.
Push and hold the Test/Hush button for
two seconds to enter RealTest mode. The
green LED will flash once every second
to indicate RealTest mode has started.
Spray canned CO agent into
the detector.
Verify CO sensing at the
control panel. The detector will
automatically exit RealTest alarm
mode after about 20-60 seconds.
NOTE: Check with local codes and the AHJ to determine if a functional gas test is desired for an installation.
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