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Voltage Monitor Relay Control

Voltage Monitor Relay Control

Categories: Power and Voltage Controls

The Voltage Monitor Relay control monitors battery voltage and based on programmable set points will energize or de-energize an external relay. The relay is activated when the voltage is above the high set point for longer than a configurable length of time, and is deactivated when the voltage drops below the low set point for the same length of time.


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(Please include all of the specifications from the Configuration Options below on your RFQ)

When connected to a 12 volt battery, this device will monitor the battery voltage, and based on programmable set points, will energize or de-energize an external relay (100mA max). The 2 set points at which the relay is switched on and off are stored in internal EEPROM memory. The relay is activated when the voltage is above the high set point for longer than a configurable length of time, and is deactivated when the voltage drops below the low set point for the same length of time. The factory default set points for the high and low points are 13 and 12 volts, respectively, with a default delay of 40 seconds. On initial power-up, if the battery voltage is higher than the low set point, the relay will be energized.

At the top of the voltage monitor is a status indicator LED. The LED is turned on when the relay is on and the battery voltage is higher than the low set point. To indicate other states that the monitor is in, the LED flashes in particular patterns.

The set points are configurable, across the valid range of input voltages for this device. An RS-232 adaptor cable is required to communicate with the voltage monitor. This cable is available for purchase from Electrolab, as part #4029RS232. Using this cable, the voltage monitor is connected to a computer. A terminal program is then used to view the status of the device, and to configure it.

Operating Specifications

Operating Voltage: 10-16VDC

Average Operating Current(Relay Off): 1 mA

Average Operating Current(Relay On): 20 mA + current drawn by relay

Output Voltage: Passthrough (dependant on input)

Maximum Output Current (To Relay): 100 mA

Mounting Type: DIN Rail

QuestionPossible Solutions
The LED on top is blinking. What does it mean?
LED StatusBattery VoltageRelay
Steadily OnAbove low set pointOn
1 BlinkBelow low set pointOff
2 BlinksBelow low set pointOn
Below high set pointOff
3 BlinksAbove high set pointOff