8210J - Electronic Speedswitch

Operation

Model 8210J monitors engine RPM via Model 11408 Magnetic Pick-Up mounted on the engine's flywheel housing. An alternator signal is also an acceptable speed signal source. When RPM's exceed the switch's set-point, the switch trips, sending an electric signal to AMOT's 4261 Intake Air Shutoff Valve (or other shut down device), shutting down the runaway engine.

Specification

Max................................................................At 40V:165mA
Operating 24V:140mA
Current 12V:125mA

Max...............................................................At 40V: 70mA
Standby 24V: 45mA
Current 12V: 30mA

Relay................................................................0.1 TO 10 Amps-
Contact 28 VDC Resistive Load
Ratings 0.1 TO 8 Amps-28 VDC Inductive Load

Power Supply...........................900 VDC for 100 Microseconds
Transient Exponential Decay
Protection 140 VDC For 1 Millisecond 110 Seconds for 0.45 Seconds Exponential Decay

Reverse.......................................................................1000 VDC
Polarity
Protection

Signal Input-
Min.:.................................................0.7 VRMS Max:................................................130 VRMS

Signal Input Impedance:............................33K Ohms (Nominal)
Operating Temp.:........................-40°F to 185°F (-40°C to 85°C)
Repeatability........................................................Less Than 1%
Overspeed Response Time................................75 Milliseconds
Recommended Wire Gauge............Terminals 3-5: 18-20 AWG
Terminals 1-2, 6-8: 14 AWG

Body Material......................................................Cast Aluminum

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This and other information from AMOT provide product or system options for further investigation by users having technical expertise. Before you select or use any product or system, it is important that you analyze all aspects of your application and review the information concerning the product in the current product catalog. The user, through its own analysis and testing, is responsible for making the final selection of the system and components and assuring that all performance, safety and warning requirements of the applications are met.