Magnetic switches and Tattletale annunciators can make or break circuits for these engines.įor electric motor application, various magnetic switches are available to operate the motor starter, holding coil directly or in conjunction with appropriate Murphy Transformer-Relay assembly. 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. For magneto or CD ignitions the magnetic switch grounds the ignition output. 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.įor distributor ignition engines, the magnetic switch opens the distributor coil circuit to cause shutdown. Specific models allow application of power to a shutdown circuit and automatic disconnect of power after a given time delay. Time delay models use reliable solid state time circuitsto lockout operated switch contacts for start-up and/or to allow operation of alarms before shutdown occurs. Only the Tattletale connected to that function sensor trips causing the reset push button to pop out.Įlectrically reset models perform the same functions as the manually reset models and are reset by cycling the power supply off and then on. In this application, one or more Tattletale/magnetic switches are used to advise operating personnel which monitored function caused shutdown. Manually reset models have a face mounted reset push button which also serves as a fault indicator in the Tattletale version. Some models have both make and break contacts.Īll models have a weather-resistant case with screw terminals for ease of customer hookup. Configurations are available for contact make or contact break to cause shutdown. Models are available to operate from battery power, 120 VAC, conventional magnetos and capacitor discharge type ignitions.Įnergized to run models allow Closed Loop circuitry. Magnetic switches and Tattletale annunciators described in this bulletin are electrically tripped relay type devices. Magnetic switches and Tattletale annunciators can make or break circuits for these engines.įor electric motor application, various magnetic switches are available to operate the motor starter, holding coil directly or in conjunction with appropriate Murphy Transformer-Relay assembly.
Diesel engines are shut down by either closing off the fuel or air supply. Some models can also trip fuel valves instead of or in addition to grounding the ignition. For magneto or CD ignitions the magnetic switch grounds the ignition output. 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.įor distributor ignition engines, the magnetic switch opens the distributor coil circuit to cause shutdown. Magnetic switches and Tattletale annunciators are available for use with engines or electric motors. Magnetic switches operate basically as a latching relay. Tattletale annunciators indicate which monitored function failed leading to the alarm or shutdown magnetic switches do not. These switches are the electrical load carrying devices for the alarm or shutdown device. Tattletale annunciators and magnetic switches are the nerve centers that translate Swichgage® contact operations into decisions and operate the alarm or shutdown device.
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