DATAKOM DSD-050 is a high-tech unit which detects seismic motion. On the occurrence of an earthquake it gives audible and visible alarms and closes a relay contact to shutdown gas and industrial valves. Thus it is possible to minimize the fire risk after an earthquake. DSD-050 is a very cost effective device for shutdown applications. The unit is based on highly reliable dual axis seismic sensors. It is small, maintenance free and capable of performing self-test. The unit operates on mains power. It incorporates a lead-acid battery and an automatic battery charger which allow uninterrupted operation even in case of AC power failures. During long mains failures, if the internal battery gets weak, the unit gives audible and visible alarms. The seismic properties of the unit are conformal to ANSI Z.21-70(1981), ASCE 25-97 and TS 12884 standards. FEATURES: Conformal to ANSI Z.21-70 (1981) Conformal to ASCE 25-97 Conformal to TS 12884 Microprocessor controlled Semiconductor acceleration sensors Dual axis Non-seismic accelerations filtered High current relay output Maintenance free Capable of performing self-test Operates on 170 to 270 V-AC Direct interface to 12V-DC valves Plug-in connection system for easy replacement Small dimensions (232x200x65mm) Low cost TECHNICAL SPECIFICATIONS: AC Power Supply Range: 170 to 270 V-AC AC Frequency range: 45 to 65 Hz AC Power Consumption: 3 VA max Battery Voltage range: 11.5 to 16.3 V-DC 12V-DC Supply Current: - 15mA typical - 60 mA max. (relay output open) Relay output: 10A / 12V-DC Output Pulse Duration: 0.25 sec. (repeated every 30 sec.) Audible Alarm: through 85 dB/1m buzzer Internal Battery: 2.2 A-h / 12V-DC Battery Life: minimum 24 hours typically 200 hours Battery Low Warning Limit: 11.5 +/- 0.3 V-DC Sensor: Dual axis micro-machined polysilicon accelerometers Acceleration Threshold: 180 mg at 2.5Hz Detection Delay: 0.5sec maximum Frequency response: 0.5 Hz to 10 Hz. Non-earthquake signals filtered Cable Broken Limit: 680 ohms (typical) Diagnostics: Self-diagnostics at power-on and reset Operating temperature range: -20 to 70 °C (-4 to +158°F) Weight: 3200 grams (approx.) Dimensions: 232 x 200 x 65 mm (W x H x D) Conformity: ANSI Z21.70(1981) ASCE 25-97 TS 12884 WE DO NOT SHIP THIS PRODUCT TO USA AND CANADA