GMA81/ GMA81 A
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Catalog excerpts

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

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