GM011 LATCHING SPEED SWITCH

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The GM-011 LATCHING SPEED SWITCH is a printed circuit board assembly intended to function primarily as an overspeed detector on Diesel prime movers. The engine speed is determined by measuring the output frequency from a magnetic pickup mounted adjacent to the engine ring gear. Should the engine go into overspeed, an internal self-locking relay is immediately energised. De-energisation can not take place until the supply voltage to the switch is interrupted. Alteration of the operating set point is accomplished through a screw driver adjusted potentiometer. Designed for panel mounting.

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INTRODUCTION

The GM-011 LATCHING SPEED SWITCH is a printed circuit board assembly intended to function primarily as an overspeed detector on Diesel prime movers. The engine speed is determined by measuring the output frequency from a magnetic pickup mounted adjacent to the engine ring gear. Should the engine go into overspeed, an internal self-locking relay is immediately energised. De-energisation can not take place until the supply voltage to the switch is interrupted. Alteration of the operating set point is accomplished through a screw driver adjusted potentiometer. Designed for panel mounting.

GM011 PCB Assembly

SPECIFICATIONS

Supply voltage source: 12 or 24 volts DC (specify when ordering).
Required signal: Magnetic pickup, sensing ring-gear rotation. May be paralleled with governor or other Gammatron modules.
Speed setting: Screw driver adjusted potentiometer. Factory preset if ring-gear and required setting provided.

Repeatability:

+/- 2%

Relay contacts:

Single changeover, 8A resistive loading. 4A inductive. Relay locks on in the event of an overspeed condition.

SCHEMATIC

GM011 Electrical Schematic

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