General Watchdog Timer* System (1.6 second) Temperature (Operating)* -10~70 °C (14~158 °F) Humidity* 5~95 %RH Temperature (Storage)* -25~85 °C (-13~185 °F) Interface* RS-485 Isolation Protection* 3000 VDC Communication Protocol* ASCII command Communication Speed* Serial: From 1,200 to 115.2 k Comm. Distance* Serial: 1.2 km Data Flow Control* Yes Connector* 1 x plug-in terminal block (#14~22 AWG)