... ~ +45C; LED: -10C ~ +55C; Storage: -20C ~ +70C- Humidity: < 93%RH, no condensation, without corrosive gas- Altitude: < 2500m3.Options- Communication (/C) : RS485 ... RTU); 1 start bit, 8 data bit, 1 stop bit, no parity, speed (1200/2400/4800/9600/19200)- Analog output(/M ... ): 2DI/2DO; DI: dry contact Input, supplied inside, optoisolator; DO: NO-NC contact; 1A/30VDC,5A/250VAC (to control other equipments)4 ...