Murphy VS2 User Manual

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

Description

The VS2 Series switches are shock sensitive
mechanisms for shutdown of engine or elec­tric motor powered equipment. These
switches use a magnetic latch to ensure reli­able operation. Explosion-proof “EX” mod­els for hazardous locations are available.

Applications

Ideal for use on engines, pumps, compres­sors, 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 sen­sitivity 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.

VS2EX
Case: Base mount, explosion-proof aluminum

alloy housing; meets NEMA 7/IP50 specifi­cations; 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).

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 built­in 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

VS2EX

VS2

*CSA and UL listed with 480 VAC rating.

LISTED

*

VS-96013B

Revised 09-08

Catalog Section 20

00-02-0076

Shock and Vibration Switch

VS-96013B page 2 of 4

ELECTRICAL

Contact Rating:

5 A @ 480 VAC

VS2 and VS2C

VS2EX

• NEMA 7/IP50 Specifications

• Snap-switch Contacts

• TATTLETALE

®

Reset Button

The VS2 and VS2C are designed for use in non-hazardous loca­tions. They have leaf type SPDT, double make contacts that can
be used for shutdown and/or alarm. They have a slotted sensitivity
adjustment located on the side of the case (see drawing below).

Model VS2EX is housed in an explosion-proof enclosure with
threaded cover. This enclosure is CSA and UL listed for Class I,
Division 1, Groups C & D hazardous locations. In place of the
leaf type contacts, 2-SPDT snap-switches are used in this model.
Sensitivity is externally adjustable and, when tripped, the VS2EX
gives a TATTLTALE

®

indication on the reset button. It is con-

structed to meet NEMA 7 specifications.

ELECTRICAL

Contact Rating:

5 A @ 125–480 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
2 A Resistive 30 VDC
1 A Inductive 30 VDC

2-SPDT Switches (DPDT)

NO1

COM

NO2NC

4-11/16 in.

(119 mm)

5-3/8 in.

(137 mm)

VS2C Model

SIDE VIEW FRONT VIEW

Air Gap

3-1/8 in.
(80 mm)

2-1/4 in.
(57 mm)

Permanent
Magnet

Reset
Push
Button

Mounting

Bracket

C-clamp

Mounting

Bracket

VS2C Model

(Cover removed)

NO1 NC COM NO2

5-1/8 in. (130 mm)

Mounting Holes

4-40 NC
Screw
Terminal

Permanent
Magnet

TATTLETALE
Reset Push
Button

Air Gap

(10 mm)

4-11/16 in.

(119 mm)

3/8 in.

4 places

Adjustment
Armature

Slotted Sensitivity
Adjustment

1/2 Conduit
Threads

Weatherproof
Strain Relief
Bushing (VS2C)

1/4 x 1/2 in.

(6 mm x 13 mm)

Slot 2 places

5-5/8 in. (143 mm)

3 in.

(76 mm)

Mounting

Holes

5-1/4 in.

®

NC NO COM

NC NO

COM

TOP VIEW

(Cover removed)

(133 mm)

Mounting

Holes

6-3/8 in.

(162 mm)

COM

N.C.N.O.

COM

N.C.N.O.

1/2 NPT

Conduit

4-7/8 in.

(124 mm)

(44 mm)

1-3/4 in.

SIDE VIEW

Slotted
Sensitivity

Adjustment

MORE

SENSITIVE

LESS
SENSITIVE

VS2EXR

• Remote Reset Feature

• NEMA 7 Specifications

• Snap-switch Contacts

• TATTLETALE

®

Reset Button

Model VS2EXR features an electric remote reset feature in addi­tion to the TATTLETALE

®

reset button. The VS2EXR uses only
one SPDT snap-switch and is CSA and UL listed for Class I,
Division 1, Groups C & D hazardous locations. It is constructed
to meet NEMA 7 specifications.

VS2EXRB

• For Group B Locations

• Snap-switch Contacts

• DPDT Feature Optional

Model VS2EXRB is constructed for use in Class I, Division 1,
Group B, hazardous locations. It has, as standard, a SPDT snap­switch and an electric remote reset. Option is available for DPDT
snap-switch.

ELECTRICAL

Contact Rating:

5 A @ 125–480 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
2 A Resistive 30 VDC
1 A Inductive 30 VDC

Remote Reset Rating:

115 VAC or 24 VDC (Specify)
350 mA AC/DC

Remote

Reset

SPDT

Snap-switch

ELECTRICAL

Contact Rating:

5 A @ 125–480 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
2 A Resistive 30 VDC
1 A Inductive 30 VDC

Remote Reset Rating:

115 VAC or 24 VDC (Specify)
350 mA AC/DC

N.C.N.O.

COM

N.C.N.O.

COM

Remote

Reset

Option SPDT

Snap-switch (DPDT)

SPDT

Snap-switch

VS-96013B page 3 of 4

Remote
Reset Coils

5-5/8 in. (143 mm)

3 in.

(76 mm)

Mounting

Holes

N.C.N.O.

COM

TATTLETALE
Reset Push
Button

4-40 NC
Screw Terminal

4-7/8 in.

(124 mm)

Permanent
Magnet

Air Gap

3/8 in.

(10 mm)

4 places

1/2 NPT

Conduit

1-3/4 in.
(44 mm)

5-1/4 in.

(133 mm)

®

NC NO COM

TOP VIEW

(Cover removed)

SIDE VIEW

Mounting

Holes

Slotted
Sensitivity

Adjustment

MORE

SENSITIVE

6-3/8 in.

(162 mm)

LESS
SENSITIVE

9-1/8 in.

(232 mm)

Mounting

Centers

6 in.

(152 mm)

6 in.

(152 mm)

2-1/2 in.

(64 mm)

10-5/8 in.
(270 mm)

TOP VIEW

(Cover removed)

8 in.

(203 mm)

NC NO COM

8-5/8 in.

(219 mm)

1/2 NPT
Conduit

10-3/16 in.

(259 mm)

4-1/2 in.

(114 mm)

Mounting Centers

SIDE VIEW

How to Order

To order your VS2 Series model use the diagram below.
Part number example: VS2EXR-24

___ – ___

Options

24 = 24 VDC reset coil on VS2EXR or VS2EXRB
15 = 115 VAC reset coil on VS2EXR or VS2EXRB
D = DPDT switch on VS2EXRB only
LC = Less case
LCC = Less cable and clamps on VS2C

Base Model

VS2
VS2C
VS2EX
VS2EXR
VS2EXRB

NOTE: Order C-clamp

mounting kit as a separate
line item for VS2EX and
VS2EXR.

Service Parts

When ordering service parts, specify both part number and descrip­tion in listing below.

PART NO. DESCRIPTION

VS2 and VS2C

20-00-0030 Movement assembly
20-00-0031 Glass and gasket assembly
20-00-0032 Reset push button assembly
20-05-0021 Mounting clamp (VS2C)
20-00-0261 Cable clamp assembly (1 each) (VS2C)
20-05-0465 2-Conductor electrical cable, 45 feet (13.7 meters) (VS2C)
20-00-0137 5 clamps and 45 feet (13.7 meters) of cable (VS2C)

VS2EX

20-01-0091 Movement assembly
20-05-0087 Cover
00-00-0309 Cover gasket
20-01-0090 Snap-switch and insulator kit (1 switch per kit)

prior to September 1, 1995.*

20-00-0288 Snap-switch and insulator kit (1 switch per kit) for models

manufactured on September 1, 1995 or later.*

20-00-0289 C-clamp conversion mounting kit

VS2EXR

20-00-0262 Movement assembly
20-05-0087 Cover
00-00-0309 Cover gasket
20-01-0090 Snap-switch and insulator kit (1 switch per kit)

prior to September 1, 1995.*

20-00-0288 Snap-switch and insulator kit (1 switch per kit) for models

manufactured on September 1, 1995 or later.*

20-00-0049 Reset solenoid assembly (115 VAC)
20-00-0234 Reset solenoid assembly (24 VDC)
20-00-0289 C-clamp conversion mounting kit

VS2EXRB

20-01-0090 Snap-switch and insulator kit (1 switch per kit)

prior to September 1, 1995.*

20-00-0288 Snap-switch and insulator kit (1 switch per kit) for models

manufactured on September 1, 1995 or later.*

20-00-0057 Inside snap-switch and insulator kit (1 switch per kit) for

model VS2EXRB-D prior to September 1, 1995.*

20-00-0058 Outside snap-switch and insulator kit (1 switch per kit) for

model VS2EXRB-D prior to September 1, 1995.*

20-00-0287 Outside snap-switch and insulator kit (1 switch per kit) for model

VS2EXRB-D manufactured on September 1, 1995 or later.*

20-00-0290 Inside snap-switch and insulator kit (1 switch per kit) for model

VS2EXRB-D manufactured on September 1, 1995 or later.*

20-05-0077 Adjustment shaft
20-00-0262 Movement assembly
20-00-0049 Reset solenoid assembly (115 VAC)
20-00-0234 Reset solenoid assembly (24 VDC)

* Models with date 0895 and before use old switch. Dated 0995 after, use straight snap-switch

arm, no rollers.

Shipping Information

VS2 and VS2C

Shipping Weight:

VS2: 2 lb 8 oz. (1.1 kg)
VS2C: 7 lb (3.2 kg)

Shipping Dimensions:

VS2: 8-1/4 x 9-1/4 x 5 in. (210 x 235 x 127 mm)
VS2C: 12 x 7 x 5-1/2 in. (305 x 178 x 140 mm)

VS2EX

Shipping Weight: 4 lb 8 oz. (2 kg)

Shipping Dimensions: 8-1/4 x 9-1/4 x 5 in. (210 x 235 x 127 mm)

VS2EXR

Shipping Weight: 5 lb 8 oz. (2.2 kg)

Shipping Dimensions: 8-1/4 x 9-1/4 x 5 in. (210 x 235 x 127 mm)

VS2EXRB

Shipping Weight: 17 lb 8 oz. (7.9 kg)

Shipping Dimensions: 12 x 12 x 10 in. (305 x 305 x 254 mm)

VS-96013B page 4 of 4

FRANK W. MURPHY, LTD

Church Rd Laverstock
Salisbury SP1 1QZ UK
Phone: [phone] Fax: [phone]
E-mail: [e-mail]
Web site: www.fwmurphy.co.uk

COMPUTRONIC CONTROLS, LTD

41 - 43 Railway Terrace
Nechells, Birmingham B7 5NG UK
Phone: [phone] Fax: [phone]
E-mail: [e-mail]
Web site: www.computroniccontrols.com

FW MURPHY INSTRUMENTS (HANGZHOU) CO. LTD

77 23rd Street
Hangzhou Economic & Technological Development Area
Hangzhou, Zhejiang 310018 China
Phone: [phone] Fax: [phone]

FW MURPHY INTERNATIONAL TRADING (SHANGHAI) CO., LTD.

Suite 1704, Tower B, City Center of Shanghai; 100 Zunyi Road
Shanghai, 200051 China
Phone: [phone] Fax: [phone]
Web site: [e-mail]

FW MURPHY

P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone] Fax: [phone]
E-mail: [e-mail]

INDUSTRIAL PANEL DIVISION

Fax: [phone]
E-mail: [e-mail]

MURPHY POWER IGNITION

Web site: www.murphy-pi.com

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819
Rosenberg, Texas 77471 USA
Phone: [phone] Fax: [phone]
E-mail: [e-mail]

Printed in U.S.A.

www.

fwmurphy

.com