... ;4.Distribution Grid, transmission grid, power substation;5.The switch tower and the main transformer;6.Outdoor Security Alarm System ... ;12.Supports external siren, the siren working time is programmable from 0 to 10minutes;13.Supports operation logs to distinguish ... temperature: Negative 35 to Positive 80 degree Digital input: 8 (Dry contact, NC,NO,EOL)Digital Output Relay: 2 (10A,240VAC)Solar Panel ...