Shock/Vibration Control Switches
Installation Instructions
Models: VS2, VS2C, VS2EX, VS2EXR, VS2EXRB and VS94
GENERAL INFORMATION
Please read the following instructions before installing. A visual inspection of this product for damage during shipping is recommended before
mounting. It is your responsibility to have a qualified person install the unit, and make sure installation conforms with NEC and local codes.
Model VS2EX
LISTED
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VS-7037N page 1 of 8
Description
The Murphy shock and vibration switches are available in a variety of
models for applications on machinery or equipment where excessive
vibration or shock can damage the equipment or otherwise poses a
threat to safe operation. A set of contacts is held in a latched position
through a mechanical latch and magnet mechanism. As the level of
vibration or shock increases an inertia mass exerts force against the
latch arm and forces it away from the magnetic latch causing the latch
arm to operate the contacts. Sensitivity is obtained by adjusting the
amount of the air gap between the magnet and the latch arm plate.
Applications include all types of rotating or reciprocating machinery
such as cooling fans, engines, pumps, compressors, pump jacks, etc.
Models
VS2: Base mount; non hazardous locations.
VS2C: C-clamp mount; non hazardous locations.
VS2EX: Explosion-proof; Class I, Div. 1,
Groups C and D.
VS2EXR: Explosion-proof with remote reset.
VS2EXRB: Explosion-proof; Class I, Div. 1, Group B; with
remote reset.
VS94: Base mount; non hazardous locations, NEMA 4X/IP66.
Remote Reset Feature (VS2EXR,
VS2EXRB and VS94 only)
Includes built-in electric solenoid which allows reset of tripped unit from a
remote location. Standard on VS2EXR and VS2EXRB. Optional on
VS94 (options listed below).
-R15: Remote reset for 115 VAC
-R24: Remote reset for 24 VDC
Time Delay Option (VS94 only)
Overrides trip operation on start-up. For VS94 series models, the delay
time is field-adjustable from 5 seconds up to 6-1/2 minutes with a 20-
turn potentiometer (15 seconds per turn approximately). Options listed
below:
-T15: Time delay for 115 VAC
-T24: Time delay for 24 VDC
Space Heater Options (VS94 only)
This optional space heater board prevents moisture from condensing
inside the VS94 Series case. Options listed below:
-H15: Space heater for 115 VAC
-H24: Space heater for 24 VDC
Warranty
A limited warranty on materials and workmanship is given with this FW
Murphy product. A copy of the warranty may be viewed or printed by going
to www.fwmurphy.com/support/warranty.htm
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