Description

Key Features • Internal sensor • SPDT relay output • 5-100 rpm (M100T), 100-5,000 rpm (M5000T) under-speed setting • Terminal block for easy wiring • 115, 230 VAC (50-60 Hz) and 12, 24 VDC power options • Works with Electro-Sensors magnetic pulser discs / wraps • Optional EZ-100 Mounting Bracket and Mounting Magnet • Cast aluminum explosion proof (XP) housing • UL Listed Class I, Div I (C, D) Class II, Div I (E, F, G) Description M100T and M5000T Speed Switches detect the unwanted slowdown of process equipment including drive trains, power-driven components, crushers, exhaust fans, screw conveyors, and tail pulleys on belt conveyors and bucket elevators. Models contain a sensor and switching electronics in an explosion proof, cast aluminum housing. Each switch uses a shaft-end mounted Pulser Disc or shaft mount Split Collar Pulser Wrap which generates an alternating magnetic field that is picked up by the speed switch. The switch decodes this frequency signal to determine shaft speed and compares it to the pre-adjusted setpoint. The setpoint is easily calibrated via a single-turn potentiometer. In the event of rotational failure, the relay can be used to provide an alarm or equipment shutdown, assuring machine protection and process integrity. Principle of Operation The M100T and M5000T measure shaft speed by sensing magnets embedded in a pulser disc attached to the rotating shaft end or a split collar pulser wrap attached around the shaft. The rotating shaft with an end mounted pulser disc or a split collar pulser wrap creates a rotating magnetic field that is detected by the Hall Effect sensor in the Shaft Speed Switch. If the rotation speed detected is below the user adjusted setpoint, the output relay de-energizes, providing an alarm signal or equipment shutdown. Sensor Gap Flexibility You only need a ruler to position our sensing heads (with our competitors you need a feeler gauge). Compare our sensor tolerances to competitors before you purchase and install an inflexible rotational pickup device.