The Voltage Monitor Relay With Reset (acknowledgment) has outputs for a signal, buzzer or other indicators. It can be used to turn on/off acoustic or optical warning signals when the input voltage drops below/exceeds a defined voltage level.
The Voltage Range Monitor is used to switch loads off when the voltage exceeds/drops below an upper/lower threshold voltage and switch loads on again when the voltage enters the range between upper/lower threshold voltages. Please specify the desired upper/lower threshold voltage in the purchase order.