Murphy TATTLETALE User Manual
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
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