Page 38 - catalogue-2024

Earthquake Detectors / DSD-50

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

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 selftest.

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.

Earthquake Detectors / DSD-60
FEATURES
• Conformal to ANSI Z.21-70 (1981) • Maintenance free
• Conformal to ASCE 25-97 • Capable of performing self-test
• Microprocessor controlled • Operates on 10 to 30 volts DC
• Semiconductor acceleration sensors • Direct interface to gensets,
• Dual axis elevators and alarm systems
• Non-seismic accelerations filtered • Overload protected relay outputs
• Separate outputs for standard and • Resin molded design
high sensitivity

DSD-060 is a high-tech unit which detects seismic acceleration. On the occurrence of an earthquake it closes relay contacts to
shutdown any critical devices such as generators, elevators, valves and industrial equipment. Thus it is possible to minimize the
probable damage that occurs after an earthquake.

DSD-060 is a very cost effective device for shutdown applications. The device is based on highly reliable dual axis silicon
micromachined acceleration sensors. It is lightweight, small, maintenance free and capable of performing selftest.

The unit has two independent relay outputs. The seismic properties of the standard output are conformal to ANSI Z.21-70(1981)
and ASCE 25-97 standards. The auxiliary relay output which is more sensitive is intended for warning purposes.
The unit has a user adjustable sensitivity potentiometer. The adjustment range is between low and high limits allowed by the
standards.

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