GM152 DIN RAIL DUAL SPEED SWITCH

The GM152 DIN RAIL DUAL SPEED SWITCH is a low cost printed circuit board (PCB) assembly for use as a starter motor cutout sensor and over speed switch 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. With rising motor speed the starter cutout relay will operate at a set point. Should the engine go into over speed an internal self-locking relay can only be released by interrupting the supply to the PCB.

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INTRODUCTION

The GM152 DIN RAIL DUAL SPEED SWITCH is a low cost printed circuit board (PCB) assembly for use as a starter motor cutout sensor and over speed switch 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. With rising motor speed the starter cutout relay will operate at a set point. Should the engine go into over speed an internal self-locking relay can only be released by interrupting the supply to the PCB.

NOTE: The GM152 is one of a range of low cost PCB assemblies designed for OEMs to assemble their own control cubicles for use with automatic standby diesel generator sets and fire pumps etc.

OPTION : The over speed switch can be non latching (specify when ordering).

GM152 Dual Speed Switch

SPECIFICATION

Supply voltage: 12 or 24V DC (specify when ordering).
Signal source: Magnetic pickup sensing ring gear rotation. May be paralleled with governor.
Speed settings: Screwdriver adjusted potentiometers – factory preset if number of ring gear teeth and speed settings are defined (factory presets — 1000Hz, 3000Hz).
Repeatability: 2%
Relay contacts: Two functions – starter cut out and over speed, each has a single C/O contact 8A resistance loading, 4A inductive.
Ambient temp: 0-60C
Weight:
Dimensions:
Material/finish: Fibre glass PCB, clear varnish protection in DIN rail mounting braket.

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