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

Please Note: 

We are now open for normal business operation - however due to the virus we have minimal staff so delays in production will be inevitable.  We will do our best to complete all orders asap. 



AC Voltage line monitor 120/240VAC 50/60/400Hz

This image is an example for illustrative purposes only and may not be the exact part number of this product.
Production for RoHs units require at least a week to produce.
Typically a 2-3 Day Production <10pcs
Our quantity discounts:
Quantity 5+ 25+
Price $30.27 $28.67
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Optically isolated AC line voltage monitor circuit board to TTL logic output. This board is used to detect when the line voltage is active or failed, can also be used for ON/OFF sensing applications as a closed loop monitor for relay contacts, motors, or as a fuse monitor.  Output is 5VDC TTL logic.

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.

Note: 2 of these units may be operated from our relay boards or any of our boards with the 8 channel I/O port option.  The boards can be powered by the VCC (+5VDC) and ground connections on these ports, no external power supply required when connected to our units.

Nominal line voltage is 120/240VAC 50/60/400Hz, Voltage tolerance: minimum 81VAC to maximum 252VAC.  Will also detect DC voltages within this range.

1 - Detect AC line failure 50/60/400Hz (can also detect lower frequencies and high voltage DC ON/OFF sensing applications)
2 - Closed loop detector to monitor relay contacts, solenoids, motors, etc.
3 - Fuse or circuit breaker monitor
4 - Monitor ON/OFF AC/DC operation in remote locations, detect when a device is activated or deactivated locally

AC/DC line monitor example wiring

AC line monitor specifications and options (AC_line_monitor_datasheet.pdf, 435 Kb) [Download]

AC line monitor instruction manual (AC_Line_Monitor_Instruction_Manual.pdf, 381 Kb) [Download]

AC line monitor board layout (AC_Line_Monitor_Board_Layout.pdf, 62 Kb) [Download]

AC line monitor board drill template (AC_Line_Monitor_Board_Drill_Template.pdf, 51 Kb) [Download]

AC line monitor part number format (AC_Line_Monitor_Part_Number_Format.pdf, 82 Kb) [Download]

Compatible Accessories & Components

Hardware mounting kit