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Manufacturer of computer controlled relay, I/O and custom boards for commercial and industrial applications.

AC Line Monitor Boards

Features
Optically isolated AC line voltage monitor circuit board to TTL logic output.

These boards are used to detect when the line voltage is active or failed, also may be used for ON/OFF sensing applications as a closed loop monitor for relay contacts, motors, or as a fuse monitor.  Requires 5V regulated DC voltage to power the board.  Output is 5VDC TTL logic.

Multiple voltage ranges are available to suit your application with 50/60 and 400Hz frequency. 

These boards are designed for AC voltage, however they are also capable of detecting high voltage DC with the same voltages ratings as the AC.

Standalone operation, logic output of 5VDC will work with most boards with an input port or microprocessor with 5V tolerant inputs.  Requires a regulated 5VDC power source to power the circuits on the board.