Building technology/industry Gas alarm system GW-SK in DIN rail housing ■■ ■■ For up to six gas sensors (measuring points) Digital display for concentration, programming and calibration data Alarms: memory mode or volatile mode (1–4) Self-monitoring for line interruption, short circuit and power failure For continuous monitoring of inflammable or toxic gases as well as oxygen in ambient air. Ideal for industrial and building technology applications. Not suitable for use in hazardous areas (EX areas). Freely programmable gas alarm system in a compact DIN rail housing for the connection of up to six gas sensors. The control unit can monitor various types of gases. GW-S can be operated in singlestage or dual-stage mode. Limit values can be set as required. 6 integrated relays can be assigned as required (1 relay is used for general alarm and 1 relay for the audible alarm signal (horn). The other relays are available for control outputs. Among others, the following combinations are possible: ■■ 1 alarm threshold, 6 sensors, 4 alarm groups ■■ 2 alarm thresholds, 6 sensors, 2 alarm groups ■■ 3 alarm thresholds, 6 sensors, 1 alarm group The gas alarm system features a display with alternating indication of measured values and three operating levels: 1. Measurement level: Displays measured values, faults, alarms 2. Parameter level: Displays measuring ranges, limit values, alarm groups 3. Service level: Displays limit values, performs function checks of the relays, setting of parameters (such as alarm group and limit value settings) GW-SK alternately displays the concentration at each measuring point. If a sensor exceeds alarm level 1 or alarm level 2, the visual alarm and the alarm relay are activated. When the concentration falls below the alarm level, the alarm is cleared. It is also possible to program GW-SK in such a way that alarm level 2 remains stored until a manual reset. The activation of the relay for the horn can also be programmed for each alarm level. Stop mode allows of permanent indication of the concentration at a given measuring point. GW-SK is self-monitoring (line interruption, short circuit and power failure) and signals faults via LED and fault relay. In addition, the display shows an "E". The alarm function can be tested without test gas. Technical Sensor inputs specifications 4–20 mA Up to six gas sensors can be connected i Suitable gas sensors (series 400−800) see page 118–119. Operating temperature range Ambient: -10/+40 °C Housing Alarm thresholds DIN rail housing (DIN 43880) Max. 4, adjustable, memory mode or volatile mode can be clipped onto 35 mm DIN rails W x H x D: 105 x 75 x 90 mm Switching outputs Weight: 650 g 6 voltage-free relay contacts Degree of Protection: IP 30 (EN 60529) Controls Options Keypad for alarm and horn reset, ■■ Serial interface edit, menu selection, Enter ■■ Data logger Display ■■ Uninterrupted power supply Digital display for concentration values, menu LEDs for: DG: H; PU 1 Part no. ■■ Alarm and fault for each measuring point ■■ Operational, horn and indicated measuring point GW-SK 61163 Options Supply voltage Connection kit 69114 24 V DC AC 230 V operation Power input Uninterrupted power 69115 24 V max. 30 W supply Version with Electrical connections data logger 35-pin screw terminals Division III