Murphy VS2 Series Specification Sheet

Shock and Vibration Switch
VS2EX
LISTED *
Description
The VS2 Series switches are shock sensitive
mechanisms for shutdown of engine or elec-
tric motor powered equipment. These
switches use a magnetic latch to ensure reli-
able operation. Explosion-proof "EX" mod-
els for hazardous locations are available.
Applications
Ideal for use on engines, pumps, compres-
sors, heat exchangers and pumping units, the
VS2 Series can be used anywhere shutdown
protection from damaging shock/vibration is
desired. Switches are field adjustable to sen-
sitivity required in each application.

Specifications

VS2 and VS2C
Case: Equal to NEMA 3R. Suitable for
non-hazardous areas.
VS2: Base mount
VS2C: C-clamp mount, includes 45 ft. (13.7 m)
2-conductor cable, and 5 cable clamps.
Contacts: SPDT-double make leaf contacts,
5A @ 480 VAC.
VS2
VS2EX
Case: Base mount, explosion-proof aluminum
alloy housing; meets NEMA 7/IP50 specifi-
cations; Class I, Division 1, Groups C & D;
UL and CSA listed. *
Snap-switches: 2-SPDT snap-switches; 5A
@ 480 VAC;* 2A resistive, 1A inductive,
up to 30 VDC.
Normal Operating Temperature: -40 to
140°F (-40 to 60°C).
VS2EXR
Case: Same as VS2EX.
Snap-switch: 1-SPDT snap-switch and reset
coil; 5A @ 480 VAC;* 2A resistive, 1A
inductive, up to 30 VDC.
Remote Reset : 115 VAC or 24 VDC (specify).
VS2EXRB
Case: Explosion-proof aluminum alloy
housing; rated Class I, Division 1, Group
B hazardous areas.
Snap-switch: 1-SPDT snap-switch with
reset coil (option available for 2-SPDT
switches); 5A @ 480 VAC; 2A resistive,
1A inductive, up to 30 VDC.
Remote Reset: 115 VAC or 24 VDC (specify).
VS-96013B page 1 of 4
VS2 Series
■
Designed to Detect Shock/Vibration
in 3-Planes of Motion
■
Fully Adjustable
■
Includes Magnetic Latching Feature
■
Manual or Electric Reset

Basic Operation

Pushing the reset button moves the tripping
latch into a magnetically held position.
A shock/vibration will move the magnet
beyond this holding position, thus freeing
the spring loaded tripping latch to transfer
the contacts and shutdown the machinery
(see dimensional diagrams in the following
pages for visual representation of parts).
Remote Reset Option
(VS2EXR and VS2EXRB)
The remote reset option includes a built-
in electric solenoid which allows reset of
tripped unit from a remote location.
Available for 115 VAC or 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
*CSA and UL listed with 480 VAC rating.
VS-96013B
Revised 09-08
Catalog Section 20
00-02-0076