The GM-012 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 GM012 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).
Specifications:
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: - |
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Dimensions: - |
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Material/finish: |
Fibre glass PCB, clear varnish protection. |
Contact Supplier for more information
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