Murphy 518E, 520APH, 521PH Specification Sheet

78793B page 1 of 4

Description

TATTLETALE®annunciators and Magnetic Switches are
the nerve centers that translate SWICHGAGE®contact
operations into decisions and operate the alarm or
shutdown device. They are the electrical load carrying
devices for the alarm or shutdown device. TATTLETALE

®

annunciators indicate which monitored function failed
leading to the alarm or shutdown whereas magnetic
switches do not. Magnetic switches operate basically as a
latching relay.

Application

Magnetic Switches and TATTLETALE®annunciators are
available for use with engines or electric motors. Various
circuits, time delays, and contact configurations are
available to match the power source and mode of
operation required for alarm only, alarm before shutdown
or shutdown only.

For distributor ignition engines, the magnetic switch opens
the distributor coil circuit to cause shutdown. For magneto
or CD ignitions the magnetic switch grounds the ignition
output. Some models can also trip fuel valves instead of
or in addition to grounding the ignition. Diesel engines are
shut down by either closing off the fuel or air supply.
Magnetic switches and TATTLETALE®annunciators can
make or break circuits for these engines.

For electric motor applications, various magnetic switches
are available to operate the motor starter, holding coil
directly or in conjunction with appropriate Murphy
Transformer-Relay assembly.

Features

Magnetic switches and TATTLETALE®annunciators
described in this bulletin are electrically tripped relay type
devices. Models are available to operate from battery
power, 120 VAC, conventional magnetos and capacitor
discharge type ignitions. Energized to run models allow
CLOSED LOOP circuitry. Others draw momentary power to
trip. Configurations are available for contact make or
contact break to cause shutdown. Some models have both
make and break contacts.

All models have a weather resistant case with screw
terminals for ease of customer hookup. Manually reset
models have a face mounted reset push button which also
serves as a fault indicator in the TATTLETALE®version. In
this application, one or more TATTLETALE®/magnetic
switches are used to advise operating personnel which
monitored function caused shutdown. Only the
TATTLETALE®connected to that function sensor trips
causing the reset push button to pop out.

Electrically reset models perform the same functions as
the manually reset models and are reset by cycling the
power supply off and then on.

Time delay models use reliable solid state timing circuits to
lockout operated switch contacts for start-up and/or to allow
operation of alarms before shutdown occurs. Specific
models allow application of power to a shutdown circuit and
automatic disconnect of power after a given time delay.

See the chart on page 2 for features by part number.

■■

Nerve Centers
for Murphy
SWICHGAGE

®

Instruments and
Automation
Systems

* Applies to selected models.

*

78793B

Revised 4-08

Catalog Section 25

TATTLETALE®Annunciators and
Magnetic Switches

78793B page 2 of 4

MS2100

Multi purpose TATTLETALE

®

with dry contacts that can be used to make
two circuits and break another when tripped.
Operates from 120 VAC or Capacitor
Discharge Ignition. The operating coil is inter­mittent duty and must be disconnected by an
external circuit when tripped. The MS2100 is a
replacement for 100PH, 307CD, 307PHCD and 224CD.

MS2110

Multi purpose TATTLETALE

®

with dry contacts that can be used to make
two circuits and break another when tripped.
Operates from 12 or 24 VDC or 24 VAC. The
operating coil is intermittent duty and must

be disconnected by an external circuit when
tripped. The MS2110 is a replacement for
221PH, 169PH, 274 and 274PH.

NOTES

The chart above indicates features/configurations available for each model.

1. Coil Voltage-Coils are specific voltage rated or multiple voltage rated.

2. Contacts-This is the control circuit output. In the latched position the NCH con-

tact has a “hot” output; in the tripped position the NOH contact has a “hot” out­put. In the latched position, the NCG has a “grounded” output; in the tripped
position, the NOG has a “grounded” output.

3. Latch Type-Refers to whether the magnetic coil is momentarily energized to trip

or requires continuous power in the operating mode and de-energizes to trip.

4. Reset Type-Refers to manual or electric reset; manual indicating type is a TAT-

TLETALE®.

5. Time Delay-Indicates operation of the time delay.

6. Coil Resistances in OHMS, or coil and resistor

1.) 0.5 2.)18 3.)30 4.)72 5.)90/190 for 12/24 6.)288 7.)339/678 for 12/24

8.)339/618 for 12/24

117/117PH Use to shutdown 12V thru

32V distributor ignition or diesel engines. Breaks
circuit when tripped. Opens distributor coil cir­cuit or power circuit to diesel run device.
Automatically disconnects from battery after trip.
Contacts 10 amps 32 VDC. 14 amp fuse.

Specifications

MS2120

Multi purpose TATTLETALE

®

with dry contacts that can be used to make
two circuits and break another when
tripped. Operates from Magneto Ignition.
The operating coil is intermittent duty and
must be disconnected by an external circuit
when tripped. The MS2120 is a replacement
for 307, 307PH and 224.

117

117PH

MS2100

MS2110

MS2111

MS2120

Coil Voltage

12 volt
24 volt
12/24 volt

*

120 VAC
Magneto ignition
CD ignition

Coil

(see Note 6 below)

Contacts

NCH
NOH
NCG
NOG

(see Note 2 below)

22 62 41 7 7

A
AAAAA

B
B

Latch Type

Energize to trip
Energize to latch

Reset Type

Manual indicating
Manual non-indicating
Electric non-indicating

Time Delay

Before shutdown
Start only
After shutdown

*

Multi-voltage AC or DC systems. See circuit
descriptions below and on next page.

Dry contacts normally wired in hot circuit.

A:

Dry contacts normally wired in ground circuit.

B:

518APH

518PH

518E

521PH

520APH

760A ‡

761APH

22PH

8

M4264-1

R129A

ETS30S

787 52 3 5

BBB

B

‡ Does not latch after shutdown signal clears,
automatically resets.

C S B

6 2 3

1

4

5

6 2 3

1

4

5

6 2 3

1

4

5

78793B page 3 of 4

518APH

Allows for SWICHGAGE®and/or
N.C. contacts to be wired “Closed Loop” (in
series). Any contact open or SWICHGAGE

®

contact close in the circuit shunt trips the
518APH. Specify 12 or 24 VDC. Contacts 10
amps 24V. 14 amp fuse.

518E

Same as 518APH but recommended
for high vibration application where nuisance
shutdowns typically occur due to higher than
normal vibrations (ie. wood chippers) 12 Volt

only.

520APH

Same as 518APH except with 30
second time delay before trip on one SWICH­GAGE®contact input but immediate trip on the
second SWICHGAGE®contact input. Typical
use is for immediate stop of engine from oil
pressure or coolant temperature, but delayed
shutdown from alignment switches on center
pivot irrigation system. Specify 12 or 24 VDC
and length of time delay. Time delays are
available from 5 to 120 seconds. Contacts 10 amps
24 V. 14 amp fuse.

521PH

Use with N.C. SWICHGAGE®or
switches to ground magneto or CD ignition
when tripped. Trip coil energized to run, de­energized to shutdown when N.C.
contacts open. Specify 12 or 24
VDC. Contacts 10 amps 24 V.

822PH

Used in Murphy TR-assemblies as
master disconnect. 24 VAC coil energizes
when SWICHGAGE®contact closes to
ground; breaks and makes circuit when
tripped. Manual reset.

M4264 Series

Detects loss of
magneto/CD ignition output and transfers con­tacts for customer use. Contacts 10 amps; 48
VAC/VDC.
M42641CD transfers SPDT dry contacts when
tripped.

760A/760AF/761APH

Use for distribu­tor ignition or diesel. Time delay lockout of
SWICHGAGE®contacts on start-up only; cus­tomer wired for delayed or immediate trip on
shutdown. Breaks and makes circuits when
tripped. 760A resets automatically when the
shutdown signal is removed or power is
removed. 761APH has manual reset. 760AF is
760A with inline fuse. Must specify 12 or 24
VDC, and length of time delay. Optional time delays: 15, 30
(standard) or 60 seconds. Contacts 10 amps 24 V. 14 amp
fuse. Models 760A and 761APH carry the CE mark.

NOTE : The 760A cannot be adequately protected by a circuit breaker in a dead short
condition with a battery as the power source. The circuit breaker will take a finite
amount of time to react, during which time the circuit board of the 760A will be dam­aged beyond repair. Fuses are the optimal method for protecting the 760A.

R129A

A SPDT relay with 10 amp dry
contacts. Specify 12 or 24 VDC. Contacts 10
amps 24 VDC. 14 amp fuse.

ETS30S

All solid-state time delay for energized to stop circuits such as
solenoids. When a shutdown signal is received, the ETS30S applies power to
the shutdown device for 30 seconds and then disconnects the power. Input
power 12 or 24 VDC.

518PH

Aallows for SWICHGAGE®and/or
N.C. contacts to be wired “Closed Loop” (in
series). Any contact open or SWICHGAGE

®

contact close in the circuit shunt trips the
518PH. Specify 12 or 24 VDC. Contacts 10
amps 24V. 14 amp fuse.

* Complies with EMC Council directive 89/336/EEC regarding electromagnetic compatibility.

*

*

MS2111

Replaces 221PH w/72 ohm coil.
Used with NICS-78 non-incendive control
system. Service part only.

*

GNC

R

SW1 SW2

B

GNO NC

R

SW1 SW2

B

GNO NC

TD

R

SW1 SW2

TD

G NO NC BS

NO NC C SW

B

Sensing

Circuit

G SWNC C

6 2 3

1 4

5

IGN

NO CBY NC



NO NC S BG

IGN



78793B page 4 of 4

How to Order

Accessories

Order accessories as a separate item. Specify part
number when ordering.

25050016 Weathercap.

25050547 Clear flexible dust boot for push button.

30050323 Single unit mounting panel.

65010026 In-line fuse holder with 14 amp fuse.

Base Models

117

*

117PH

*

518PH
518APH
518E

**

520APH
521PH
760A

*

761APH

*

822PH
M42641M

M42641CD

R129A
ETS30S
MS2100
MS2111
MS2110
MS2120

Time Delay (where applicable)

15 = 15 seconds
30 = 30 seconds
60 = 60 seconds
Specify other.

Voltage/Ground (where applicable)

12 = 12 VDC
24 = 24 VDC

Options

Not all options may not be available on all
models in combination with other options. See
“Configurations Available” chart below.

AS = Auxiliary SPDT switch
ES = Environmentally sealed
EL = Explosion-proof less case

760AF – 15 – 12 –

Specify model number and options using the diagram below. List options in alphabetical order (A to Z) followed

by numeric in ascending order. Place a dash (–) between each option.

Configurations Available

*

Add the letter “F” to the base model to indicate an inline fuse instead of a base mounted fuse. Example: 760AF, 761APHF, 117F.

**

12 Volt negative ground version only.

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

78793B

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 1784, Tower B, City Center of Shanghai; 100 Zunyi Road
Shanghai, 200051 China
Phone: [phone] Fax: [phone]
E-mail: [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

MS2120

MS2110

MS2111

518/518A/518E

Non-PH

PH

PH-ES

MS2110

1= Offered
2= Auxiliary snap-switch