Murphy Switch Annunciators and Magnetic Switches User Manual

®
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  
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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  
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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  
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  
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  
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  
Phone: +44 121 327 8500 Fax: +44 121 327 8501 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  
www.  
.com  
Printed in U.S.A.  
78793B  
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