GMA81/ GMA81 A0 pages

GMA81/ GMA81 A

Fixed gas controller for wall-mounting

Technical Data
Gases:
Depending on transmitter: Combustible and toxic
gases and vapors, oxygen
Detection range:
Depending on requirement: ppm, % LEL, % Vol.
Ambient temperature: -10°C .. +55°C
Power supply: 230 V AC
Power consumption: Max. 4 W, normal 2 W
Input signal: 0,2 .. 1 mA / 4 .. 20 mA

The GMA81 is a single channel controller for one
detection point. Together with GfG’s powerful and
robust transmitters the GMA form complete systems for
monitoring of gas hazards for many applications.

Output signal: Linearized signal 4 .. 20 mA

Easy wall mounting
The robust GMA housings can be easily mounted to the wall.
You do not need cabinets or additional enclosures. The small
size allows space saving installation. The terminal bars for
electrical connections are easily accessible behind a cover at
the front. The casing is robust and splash water proof (IP54).

Alarm functions:
Exceeding / falling below,
Latching / non-latching,
Resettable / non-resettable,
Adjustable hysteresis,
Alarm delay 0 .. 2 minutes,
De-activation variably adjustable

Monitoring more than 500 gas hazards
The gas monitoring systems allow detection of more than 500
gases. You can adapt the GMA settings to any monitoring task
for individual and cost effective solution of your specific
requirements.

Relay outputs:
4 voltage-free relay outputs for alarm and fault, NC
contacts, NO contacts, change-over contacts
Load: 1000 VA, 5 A

Detecting - Recognizing - Warning
Once the gas concentration at the transmitter exceeds a
certain threshold, the GMA recognizes the danger and triggers
an alarm. The controller provides 3 threshold alarms, which
can be programmed individually. Adjustable alarm delay
eliminates false alarms. Every threshold is adjustable within
the detection range and can be latching / non-latching and
resettable / non-resettable. This allows the best possible
adaptation of the controller to your specific detection task. All
settings can be changed, even at a later stage.
Integrated alarm devices
The GMA81 A model provide integrated audible and visual
alarm devices. A bright flashlight on top of the GMA indicates a
gas alarm. A buzzer is built-in additionally, thus saving space
and wiring efforts. Of course these models include the 4
voltage-free relays, which are standard for the GMA
controllers.

Alarms:
3 alarm thresholds,
individually adjustable within the detection range

Display:
3-digit LED display for linearized
measurement values, service
1 LED green – Operation
1 LED yellow – Fault
3 LED red – Alarm
Indication of peak and minimum
values
Function keys:
4 keys for all functions, e.g. alarm
thresholds, calibration, function and relay test
Calibration:
Automatic zeroing, calibration by means of
measurement value memory
Housing:
130 x 209 x 95 mm (WxHxD)
135 x 247 x 95 mm (WxHxD) GMA81 A
IP54, splash water proof
ATEX-certificate:

II (2)G BVS 03 ATEX G 006 X 0158
Function Test:
PFG-No. 41300600 P

GfG Headquarters
Klönnestrasse 99
44143 Dortmund ▪ Germany
Phone: +49 / (0)231 - 564 000
info@gfg-mbh.com ▪ www.gasmessung.de

GfG Europe
Great Dunmow
Essex CM6 1XG ▪ United Kingdom
Phone: +44 / (0)1371 - 874 447 ▪ Fax: +44 / (0)1371 - 879 904
info@gfgeurope.com ▪ www.gfgeurope.com