FW Murphy Magnetic Switches and Annunciators

Tattletale® Annunciators and Magnetic Switches are the electrical load carrying devices for the alarm or shutdown device. 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.

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.

 

117, 117PH Tattletale® Annunciator

murphy.117.117PHModel 117 and 117PH Tattletale® annunciators are electrically tripped relay type devices, which draw momentary power to trip. They are the nerve centers that translate Swichgage® contact operations into decisions and operate the alarm or shutdown device.

Both models are used on engines and electric motors. Each have a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The 117 and 117PH are used to shutdown 12V through 32V distributor ignition or diesel engines. Each breaks a circuit when switched. Each also opens a distributor coil circuit or power circuit to run diesel device, and automatically disconnects from battery after trip.

Specs

Coil Voltage: 12/24, multi-voltage AC or DC systems
Coil Resistance (in OHMS): 18
Contacts: NCH; in the latched position the NCH contact has a "hot" murphy.117wiringoutput.
Latch type: Energize to trip
Reset type:
     117 = manual non-indicating
     117PH = manual indicating

Literature

• Sales Bulletin (pdf)
• Wiring Tech Sheet (pdf)

518PH Tattletale® Annunciator

murphy.518PHModel 518PH Tattletale® annunciator is an electrically tripped relay type device, which draws momentary power to latch. It is the nerve center that translates Swichgage® contact operations into decisions and operates the alarm or shutdown device.

The 518PH can be used on engines and electric motors. It has a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The 518PH 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 518PH. Specify 12 or 24VDC. Contacts 10 amps 24V. Includes a 14 amp fuse.

Specs

murphy.518PHwiringCoil Voltage: 12 volt or 24 volt
Coil Resistance (in OHMS): 339/678 for 12/24
Contacts: NCH; in the latched position the NCH
                  contact has a "hot" output.
Latch type: Energize to latch
Reset type: Manual indicating

Literature

• Sales Bulletin (pdf)
• Installation and Operations Manual (pdf)
• Wiring Tech Sheet (pdf)

518APH Tattletale® Annunciator

murphy.518APHModel 518APH Tattletale® annunciator is an electrically tripped relay type device, which draws momentary power to latch. It's the nerve center that translates Swichgage® contact operations into decisions and operates the alarm or shutdown device.

The 518APH can be used on engines and electric motors. It has a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The 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 24VDC. Contacts 10 amps 24V. Includes a 14 amp fuse.

Specs

murphy.518APHwiringCoil Voltage: 12 volt or 24 volt
Coil Resistance (in OHMS): 339/678 for 12/24
Contacts: NCH; in the latched position the NCH
                  contact has a "hot" output.
                  NOH; in the tripped position the NOH
                  contact has a "hot" output.
Latch type: Energize to latch
Reset type: Manual indicating

Literature

• Sales Bulletin (pdf)
• Installation and Operations Manual (pdf)
• Wiring Tech Sheet (pdf)

MS2100 Tattletale® Annunciator

murphy.MS2100Model MS2100 Tattletale® annunciator is an electrically tripped relay type device, which draws momentary power to trip. It's the nerve center that translates Swichgage® contact operations into decisions and operates the alarm or shutdown device.

The MS2100 can be used on engines and electric motors. It has a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The MS2100 is a multi-purpose Tattletale® with dry contacts that can be used to make two circuits and break another when tripped. Operates from 120VAC 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.

Specs

murphy.MS2100wiringCoil Voltage: 120VAC / CD Ignition
Coil Resistance (in OHMS): 288
Contacts: NCH; in the latched position the NCH
                  contact has a "hot" output.
                  NOH; in the tripped position the NOH                  
                  contact has a "hot" output.
                  Dry contacts normally wired in hot circuit.
Latch type: Energize to trip
Reset type: Manual indicating

Literature

• Sales Bulletin (pdf)
• Wiring Tech Sheet (pdf)

MS2110 Tattletale® Annunciator

murphy.MS2110Model MS2110 Tattletale® annunciator is an electrically tripped relay type device, which draws momentary power to trip. It's the nerve center that translates Swichgage® contact operations into decisions and operates the alarm or shutdown device.

The MS2110 can be used on engines and electric motors. It has a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The MS2110 is a multi-purpose Tattletale® with dry contacts that can be used to make two circuits and break another when tripped. Operates from 12 or 24VDC or 24VAC. 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.

Specs

murphy.MS2100wiringCoil Voltage: 12 or 24VDC or 24VAC
Coil Resistance (in OHMS): 18
Contacts: NCH; in the latched position the NCH
                  contact has a "hot" output.
                  NOH; in the tripped position the NOH                  
                  contact has a "hot" output.
                  Dry contacts normally wired in hot circuit.
Latch type: Energize to trip
Reset type: Manual indicating

Literature

• Sales Bulletin (pdf)
• Wiring Tech Sheet (pdf)

MS2120 Tattletale® Annunciator

murphy.MS2110Model MS2120 Tattletale® annunciator is an electrically tripped relay type device, which draws momentary power to trip. It's the nerve center that translates Swichgage® contact operations into decisions and operates the alarm or shutdown device.

The MS2120 can be used on engines and electric motors. It has a weather resistant case with screw terminals for ease of customer hookup, and a face mounted reset push button which also serves as a fault indicator. One or more Tattletales are used to advise operating personnel which monitored function failed, leading to the alarm or shutdown. Only the Tattletale connected to that function sensor trips, causing the reset push button to pop out.

The MS2120 is a 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.

Specs

murphy.MS2100wiringCoil Voltage: Magneto Ignition
Coil Resistance (in OHMS): 0.5
Contacts: NCG; in the latched position the NCG
                  contact has a "grounded" output.
                  NOG; in the tripped position the NOG                  
                  contact has a "grounded" output.
                  Dry contacts normally wired in ground circuit.
Latch type: Energize to trip
Reset type: Manual indicating

Literature

• Sales Bulletin (pdf)
• Wiring Tech Sheet (pdf)

760A, 760AF Magnetic Switches and 761APH Tattletale® Annunciator

murphy.760familyModel 760A and 760AF Magnetic Switches, and Model 761APH Tattletale® Annunciator are electrically tripped relay type devices, which draw momentary power to trip. They are the nerve centers that translate Swichgage® contact operations into decisions and operate the alarm or shutdown device. Each have a weather resistant case with screw terminals for ease of customer hookup. Model 761APH has a face mounted reset push button which also serves as a fault indicator.

The 760A, 760AF and 761APH are used 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. Model 760A resets automatically when the shutdown signal is removed or power is removed. Model 761APH has manual reset. Model 760AF is a 760A with a 14 amp in-line fuse. When ordering, user must specify 12 or 24VDC, and length of time delay. Optional time delays: 15, 30 (standard), or 60 seconds. Contacts 10 amps 24V. 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.

Specs

Coil Voltage: 12 volt or 24 volt
Coil Resistance (in OHMS): 760A/AF = 90/190 for 12/24 volt; 761APH = 18
Contacts: NCH; in the latched position the NCH contact has a "hot" output.
                  NOH; in the tripped position the NOH contact has a "hot" output.
Latch type: Energize to trip
Reset type: 761APH = Manual indicating; 760A/AF = Electric non-indicating
murphy.760AwiringTime Delay: Before Shutdown and Start Only
Model 760A/AF does not latch after shutdown signal clears, automatically resets.

Literature

• Sales Bulletin (pdf)
• Wiring Tech Sheet (pdf)

ST Series: Selectronic® Tattletale® Remote Alarm Annunciators

murphy.ST.SeriesThe ST Series Selectronic® Tattletale® annunciators are a simple and inexpensive answer to your remote alarm annunciator needs. Basic models ST5AS and ST10AS are general purpose alarms suitable for a variety of applications. Model ST8 gives first out annunciation of fault. Model STA16 is designed for generator set applications and can be configured to meet NFPA requirements for standby generators.

These annunciators tell you by a flashing LED which variable malfunctioned. Many feature a pulsating Mini-Siren to audibly alert you to the malfunction. The alarm is silenced by depressing the Alarm Silence push button, but the visual signal remains in operation until the fault is corrected and the contacts are cleared.

A test push button allows you to test all alarm LED's. Because LED's are solid state, cold light, electronic devices, they don’t burn out as incandescent light bulbs do. Basic models accept 8-32 VAC or 8-40 VDC input voltage. Others are available for either 12 VDC or 24 VDC input. These unique alarm panels have wide ranging applications and can be grouped in many configurations.

Preprinted peel and stick nameplates for common faults are supplied with each unit. Most of the Selectronic Tattletale annunciators accept either normally open (N.O.) or normally closed (N.C.) contacts. You can mix N.O. and N.C. contacts on the same unit.

Two mounting styles are offered; a recessed panel mounting flange and a freestanding gimbal mounting. (Model STA16 is available only in flange mount). All models except STA16 have a time delay available to lockout the audible alarm on startup.

Features

• Provide Audible and Visual Alarm
• Simple and Inexpensive
• Wide Range of Applications
• Gen-Set Models Meet NFPA-99 and NFPA-110 Requirements

Basic Operation

When an alarm sensor trips, the LED flashes and, if equipped, the Mini-Siren sounds. At the same time an output circuit is activated which allows you to connect an external relay to operate a general alarm, operate a shutdown device, etc.

Applications

Marine, Generator Sets, Oil Field, Agriculture, Construction

Literature

• Sales Bulletin (pdf)
• Installation Instructions: ST8 (pdf)
• Installation Instructions: ST5AS & ST10AS (pdf)
• Installation Instructions: STA16 (pdf)



 
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