Line Voltage Monitor, Communication Protocol Modbus RS485, Contact Form SPDT, Delay Type Adjustable, Display Type LCD, Frequency 50/60 Hz, Maximum Control Voltage 240V AC, Maximum Voltage Measurement 600V AC, Memory Storage Programmable 25-Fault, Minimum Contol Voltage 18V AC, Minimum Voltage Measurement 190V AC, Monitored Measurements Line Voltage, Mounting Style Surface, Normally Closed Output Current 6 A, Normally Open Output Current 10 A, Operating Temperature - Maximum 149 Degrees F