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1 System Description
The Manning GM-1 is designed to accept a single
4/20 mA current input signal, plus provide a regulated
24 VDC supply to operate all sensors manufactured by
Honeywell Analytics.
The Manning GM-1 is housed in a rugged 14 gauge
gasketed steel enclosure. Behind the clear plexiglass
window is a 20-segment vertical LED bargraph display
which gives a visual indication of the gas
concentration.
The unit has warning and alarm level indications on the
front panel, and warning and alarm relays allowing the
user to incorporate functions such as ventilation
control, remote horns, security system monitoring, and
automatic shutdown.
Designed to be highly reliable when properly installed,
all relays are energized during normal operation, and a
sensor fault monitoring circuit will indicate a fault and
trip a dedicated fault relay if the signal falls below
1.4 mA.
The unit has an audible horn which will sound if an
alarm or fault condition is detected. The silence switch
will silence the horn until the next event. If an alarm
condition initiates the horn, the horn will clear
automatically when the alarm relay clears.
The unit has a power-up delay feature that places all
outputs in normal conditions for one minute to allow for
sensor stabilization.
The Manning GM-1 will support all of Manning
sensors, including oxygen, which requires a down-
scale alarm.
All components that are in contact with voltages above
40 volts are UL listed, including the enclosure.
Note: The Manning GM-1 is for use in
non-classified areas only.
Manning GM-1 Gas Monitoring Alarm System 19546 GM1 07/09 REVD Copyright © 2009 Honeywell Analytics. All Rights Reserved. 5