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Last Month's Poll

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Monitors most motors
April 1st 2005

Castell has developed an ASi-compatible motor safety relay that can monitor almost all electrical motors, including variable-speed drives.

The CMM200 now has a filtering system to reject the interference produced by VSDs that can sometimes affect similar relays. A vampire connector on the side of the unit fits a standard ASi cable and provides a Category 4 signal to the ASi master interface.

The DIN-rail mountable device monitors the back EMF generated by a motor to detect whether it is safely at rest or in motion.

The company believes it to be the only back EMF device to be controlled by dual mircoprocessors that continually check the state of the motor and the condition of the relay itself.

More articles from Castell Safety International Ltd: