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Gases and sensors: GfG transmitters for combustible, oxygen and toxic gases and vapors
GMA 200-MW wall mounting (dimensions): Approx. 8.23 x 7 x 2.52 in / 209 x 180 x 64 mm (W x H x D)
Display and control elements: Backlit LCD graphical display 1.3 x 2 in (33 x 53 mm with 132 x 65 pixels); 5 buttons (left, right, up, down, OK); LED indicators: 8 status and alarm (4x red, 1x green, 3x yellow); 6 relay (6x red)
Connection options: Gas warning system GMA 200–MW4: Up to 4 analog or digital detectors
Inputs: 4 analog inputs (4–20 mA or 0.2–1 mA); max. 50 Ohm input resistance; 2 digital inputs: Acknowledgement of alarms can be freely configured; 2x RS485 BUS (for connection of external relay modules or digital transmitters in BUS wiring); 1x RS485 BUS (for digital transfer of measured and output data to a higher-level control center or with master functionality of a GMA 200-MW for the connection of GMA 200-RT relay modules)
Outputs: Modbus (RS485); 4 relays (normally open contact), freely configurable for single alarms per measuring point and alarm threshold, configuration of collective or group alarms, fault messages and voting functions; 1 relay for maintenance and 1 for fault messages (closed-circuit principle); 2 analog outputs: 4–20 mA / 600 Ohm max. resistance, freely configurable
Alarms: 3 independent threshold alarms per measuring point (AL1, AL2, AL3); Gas alarms can be freely set in the measuring range
Alarm activation logic: Ascending, descending, exceeding, not achieved acknowledgeable (additional horn only), non-acknowledgeable, non-self-locking / self-locking
Data storage: Measured values stored on 2 GB microSD card; Intervals can be set (5 sec.–60 min.); Records instantaneous and mean values, minimum/maximum concentration; Logger settings individually programmable per measuring channel
Ambient temperature: Operation: -4 °F to +125 °F / -20 °C to +50 °C; Storage: -22 °F to +140 °F / -30 °C to +60 °C
External relay module: 16 relays per module; up to 4 relay modules per GMA 200-MW4 system (for up to 64 additional relays); freely configurable for single alarms per measuring point and alarm threshold, configuration of collective or group alarms, fault messages and voting functions
Power supply: 2 x 24 V DC, 20–30 V (1 x redundant voltage supply)
Power consumption: GMA 200–MW4 Controller: 30 W (incl. connected detectors); Relay module GMA 200 RT: 6 W
