Functional safety frequency-to-DC transmitter

21 February 2017

Forming part of its FS Functional Safety Series, Moore Industries has released a SIL 3 capable SFY Functional Safety Frequency-to-DC Transmitter with display to offer accurate monitoring of frequency or pulse signals in Safety Instrumented Systems (SIS). This can help provide overspeed protection by sending signals that warn the logic solver to alarm or shut down the monitored device for plant, process and personnel safety. 

The SFY conforms to IEC 61508:2010 standards for safety-related applications. It is designed for use in a processes and factory automation SIS including turbine flow meters, magnetic pickups, dry contact closures, variable frequency drives, turbine tachometer generators, rotating equipment, motor and conveyor speed as well as pulse and frequency output transducers. 

Users can monitor frequency, period, high or low pulse width, and contact closure signals. The SFY converts the input signal to a proportional input-to-output isolated 4-20mA output ready for direct interface with a safety system, readout instrument, recorder, PLC, DCS, or SCADA system. 

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