Combined Gas Monitors CGSM100 & CGSM300

CGSM100 & CGSM300
Combined Gas Monitors for Vaults & RT’s

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• Monitors Toxic & Combustible Gases
• Accessible Real-time Gas Level Value (ppm)
• Field Adjustable Alarm Thresholds (ppm)
• Integrated Vent Fan Control
• Audible & Visual LED Alarm Status

The CGSM100 and CGSM300 are designed to provide safe, reliable, and long life
monitoring and alarming for toxic and combustible gases for your underground
vaults, CEVs, CEMHs, CUEs, CECs, and WICs.

• Monitors Carbon Monoxide (CO), Methane (HC), and Hydrogen (H2) (optional) Gases.
• Provides separate relays for sensor failure, carbon monoxide, combustible, hydrogen
(optional), and ventilation fan plus remote indicator output.
• Provides audible and visual alarms.
• Alarm thresholds adjustable 0 to 90% in the field via RS232 port.
• Powered by –48VDC ensures gases are being monitored during commercial AC power failure.
• CGSM100 comes in a stand-alone package and connects with the TELSEC® controllers.
• CGSM300 provides direct replacement for Sierra Monitor 2400 Vault Gas Monitor.
• CGSM300 supplies power to optional smoke detector as well as pass-thru alarms via
24-pin Amphenol Connector.

Key Features
• LED indicators exhibit alarm and sensor status for each sensor.
• Fault status LED indication turns on when a sensor becomes defective.
• Automatic reset when gas levels fall below alarm thresholds.
• Reset button silences audible alarm.
• Test button simulates alarm condition and performs system test diagnostics.
• Communicate via RS232 port using standard, off-the-shelf
terminal emulation software, such as, Procomm® or Hyperterminal®.

Carbon Monoxide Sensor (CO): 25 to 500 ppm operating range; factory set to 35 ppm.
Methane Sensor (HC): 1,000-10,000 ppm operating range; factory set at 5,000 ppm.
Hydrogen Sensor (H2) (Option): 1,000-10,000 operating range; factory set to 5,000 ppm.

Remote hydrogen gas sensor for CGSM100 CGSM300 gas monitors

Remote Hydrogen Gas Sensor option with 25'(7.5M) cable

Specifications

Description

Stand-alone Gas Monitor
(interfaces with TELSEC^®)

Direct Replacement for Sierra Monitor 2400

Model#

CGSM100

CGSM300

Part#

300150

300152

PID/SSI#

001536986

001536994

Material ID#

828369

828370

Option

For Remote Hydrogen Gas Monitor option, order part# 300652 (includes 25'(7.5M) cable)

Smoke Detector Peripheral

Low profile, self-diagnostic, 4-wire photoelectric with built-in sounder, order part# 300136

Outputs

Relay Contact Rating
K1
K2
K3
K4
K5

SPDT normally de-energized for CO sensor alarm. 10 Amps, 1/8 H.P., 277VAC (Resistive)
SPDT normally de-energized for HC sensor alarm. 10 Amps, 1/8 H.P., 277VAC (Resistive)
SPDT normally de-energized for optional H2 sensor alarm. 10 Amps, 1/8 H.P., 277VAC (Resistive)
DPDT normally de-energized for power/sensor fault. 5 Amps, 1/8 H.P., 277VAC (Resistive)
DPDT normally de-energized for Ventilation fan control common to all active sensors.
One of the C contacts common leg on K5 is fused with a 4-amp socketed micro fuse.
5 Amps, 1/8 H.P., 277VAC (Resistive)

DC Power Output

+12VDC and ground (max power 60mA) for remote Smoke Detector

RS232 Port

On-site calibration, retrieval of calibration values, and adjustment of threshold alarms

Connections

CGSM300: 24-pin Mil-Spec Amphenol Connector conveys alarm status and control outputs

Power

10 to 60VDC or 17 to 42VAC, 6 Va

Audible Alarm

80dB at 1M

Electrical Compliance

Meets CSA standards (ENTELA Certification)

Ambient Operating Temp

32 to 110ºF (0 to 43ºC)

Dimensions-CGSM

8.7"(221mm) H X 8.3"(211mm) W X 4.2"(107mm) D

Dimensions-H2 Sensor

4"(102mm) H X 3"(76mm) W X 1.75"(45mm) D

Weight-CGSM

4 lbs (1.8kg)

Weight-H2 Sensor

1 lb (0.45kg)

Warranty

1 year

Specifications are subject to change without notice