®
78793B
Revised 4-08
TATTLETALE Annunciators and
Catalog Section 25
Magnetic Switches
■
Nerve Centers
for Murphy
®
SWICHGAGE
Instruments and
Automation
Systems
*
Description
Features
®
®
TATTLETALE annunciators and Magnetic Switches are Magnetic switches and TATTLETALE annunciators
®
the nerve centers that translate SWICHGAGE contact described in this bulletin are electrically tripped relay type
operations into decisions and operate the alarm or devices. Models are available to operate from battery
shutdown device. They are the electrical load carrying power, 120 VAC, conventional magnetos and capacitor
®
devices for the alarm or shutdown device. TATTLETALE
discharge type ignitions. Energized to run models allow
annunciators indicate which monitored function failed CLOSED LOOP circuitry. Others draw momentary power to
leading to the alarm or shutdown whereas magnetic trip. Configurations are available for contact make or
switches do not. Magnetic switches operate basically as a contact break to cause shutdown. Some models have both
latching relay.
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
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.
®
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.
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.
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.
* Applies to selected models.
78793B page 1 of 4
760A/760AF/761APH Use for distribu-
tor ignition or diesel. Time delay lockout of
SWICHGAGE® contacts on start-up only; cus-
tomer 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 dam-
aged beyond repair. Fuses are the optimal method for protecting the 760A.
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.
TD
R
G
NO
NC
S
B
G
NC
SW1
SW2
B
*
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.
R
G
NO
NC
SW1
SW2
B
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.
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.
520APH Same as 518APH except with 30
second time delay before trip on one SWICH-
GAGE® 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.
NO
NC
C
SW
TD
R
G
NO
NC
SW1
SW2
B
M4264 Series Detects loss of
magneto/CD ignition output and transfers con-
tacts for customer use. Contacts 10 amps; 48
VAC/VDC.
*
Sensing
Circuit
M42641CD transfers SPDT dry contacts when
tripped.
IGN
IGN
BY
NO NC
C
521PH Use with N.C. SWICHGAGE® or
switches to ground magneto or CD ignition
when tripped. Trip coil energized to run, de-
energized to shutdown when N.C.
contacts open. Specify 12 or 24
VDC. Contacts 10 amps 24 V.
*
R129A A SPDT relay with 10 amp dry
contacts. Specify 12 or 24 VDC. Contacts 10
amps 24 VDC. 14 amp fuse.
G
NC
SW
C
G
NO
NC
S
B
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.
MS2111 Replaces 221PH w/72 ohm coil.
Used with NICS-78 non-incendive control
system. Service part only.
6 1
2
3
4 5
* Complies with EMC Council directive 89/336/EEC regarding electromagnetic compatibility.
78793B page 3 of 4
How to Order
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.
760AF – 15 – 12 –
M42641CD
Base Models
Options
*
117
Not all options may not be available on all
*
R129A
117PH
518PH
models in combination with other options. See
“Configurations Available” chart below.
AS = Auxiliary SPDT switch
ES = Environmentally sealed
EL = Explosion-proof less case
ETS30S
MS2100
MS2111
MS2110
MS2120
518APH
**
518E
520APH
521PH
*
760A
*
761APH
822PH
M42641M
Voltage/Ground (where applicable)
12 = 12 VDC
24 = 24 VDC
Time Delay (where applicable)
15 = 15 seconds
30 = 30 seconds
60 = 60 seconds
Specify other.
*
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.
Configurations Available
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.
Non-PH
PH
PH-ES
1= Offered
2= Auxiliary snap-switch
Warranty
A limited warranty on materials and workmanship is given with this FW Murphy product.
FW MURPHY
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100 Fax: +1 918 317 4266
E-mail: [email protected]
FRANK W. MURPHY, LTD
Church Rd Laverstock
Salisbury SP1 1QZ UK
Phone: +44 172 241 0055 Fax: +44 172 241 0088 Hangzhou, Zhejiang 310018 China
E-mail: [email protected]
FW MURPHY INSTRUMENTS (HANGZHOU) CO. LTD
77 23rd Street
Hangzhou Economic & Technological Development Area
Phone: +86 571 8788 6060 Fax: +86 571 8684 8878
INDUSTRIAL PANEL DIVISION
Fax: +1 918 317 4124
E-mail: [email protected]
FW MURPHY INTERNATIONAL TRADING (SHANGHAI) CO., LTD.
Suite 1784, Tower B, City Center of Shanghai; 100 Zunyi Road
Shanghai, 200051 China
COMPUTRONIC CONTROLS, LTD
41 - 43 Railway Terrace Nechells
Birmingham B7 5NG UK
E-mail: [email protected]
Phone: +86 21 6237 2082 Fax: +86 21 6237 2083
MURPHY POWER IGNITION
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819
Rosenberg, Texas 77471 USA
Phone: +1 281 633 4500 Fax: +1 281 633 4588
E-mail: [email protected]
www.
.com
Printed in U.S.A.
78793B
78793B page 4 of 4
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