Building technology For natural gas and liquid gas (gas detector) For early detection of smoke (smoke detector) Audible and visual alarms; Acknowledge button and relay output Self-monitoring for line interruption, short circuit and sensor defect A 5 Application For continuous monitoring of explosive gases, vapours and smoke and for generating alarms in conjunction with the appropriate sensors. GRM is installed in heating rooms and basements, storage, office and residential buildings as well as public facilities to increase safety. Not suitable for installation in hazardous areas (EX areas). Description Alarm unit in a wall mounting housing with audible and visual alarms. GRM features an alarm threshold and is equipped with a relay contact. If the threshold value is exceeded, the unit generates an alarm. The red LED lights up, the audible alarm goes on and the alarm relay switches. The audible alarm can be muted with the Acknowledge button. When the alarm condition no longer exists, you press the Acknowledge button again to clear the visual alarm (alarm memory). The alarm can only be cleared with the Acknowledge button if the reason for the alarm has been removed. If the concentration still exceeds the alarm threshold, pressing the Acknowledge button does not clear the alarm. The voltagefree relay contact allows you to switch additional external signalling equipment such as the event reporting system EMS, horns, lamps, fans or fan controllers in the case of alarm or fault conditions. GRM is suitable for panel mounting with a mounting frame. A sealing kit (IP 54) is available for rough application conditions. The following sensor combinations are possible with GRM: 1. 1 gas sensor and 1 smoke sensor 2. 2 gas sensors 3. 2 smoke sensors 4. 1 gas sensor 5. 1 smoke sensor Technical specifications Inputs 2 sensors Connection cable 3 wires Wire cross section > 0.5 mm2 Distance control unit – sensor Max. 150 m Alarm threshold 1 permanently installed alarm threshold for alarm at 20 % LEL (for gases) with alarm memory Display 1 green LED: Operation 1 red LED: Flashing: fault Steady on: alarm Audible alarm Piezo buzzer approx. 70 dB(A), can be acknowledged Switching outputs Relay contacts: voltage-free changeover contact 1 Contact rating: AC 250 V, 2 A Supply voltage AC 230 V Power input 15 VA Operating temperature range Ambient: 0/40 °C Housing Wall mounting housing made of impact-resistant plastic (ABS) W x H x D: 100 x 188 x 65 mm Weight: 0.55 kg Degree of protection: IP 40 (EN 60529) Please order sensors and calibration separately.