General Temperature (Operating)* -10 ~ 70° C (14 ~ 158° F) Humidity* 5 ~ 95% RH Temperature (Storage)* -25 ~ 85° C (-13 ~ 185° F) Interface* RS-232 to RS-422/485 Isolation Protection* 3,000 VDC Communication Speed* Serial: From 1,200 to 115.2 k Comm. Distance* RS-422/485: 1.2 km RS-232: 15 m Data Flow Control* Yes Connector* RS-232: female DB9RS-422/485: plug-in screw terminal