=Adopts the industrial GSM/GPRS module SIEMENS MC35I with the external aluminium casing. =The 232/TTL/485/422 COM port can be converted to RS232 automatically =Heartbeat detection and automatic watchdog reset. =Data transmission of dial-up networking and message etc. by connecting to the industrial computer and PC. =Dual frequency GSM/GPRS MODEM module. =The data terminal is online at any time. =Be able to work in the low or high temperature surrounding. =Disconnected redial and heartbeat function based on PING mode. =Scalability and strong anti-interference =WATCHDOG =Dimension: 96*54*25mm =Weight: 150g =Module work temperature: -30°C~60°C =Elements work temperature: -45°C~80°C =Humidity range: ≤90% no condensation =Voltage range: 5V~25V DC =Power supply: 9V DC/1000Ma =Work current: 360mA@+9VDC =Standby current: 35mA@+9VDC =Antenna interface: 50Ω/SMA =SIM Card 3V/5V, auto test =Data interface: DB15 RS-232/485/422/TTL =Baud rate: 300~115,200bits/s