A 3G modem is a device that allows a computer to connect to the Internet via a high-speed mobile broadband connection. This means that the Internet signal is broadcast over the airwaves rather than sent and received through a cable or telephone line.
The modbus-modem is MODBUS master that gets information from connected MODBUS RTU devices over RS485 bus and sends to mapped server over GPRS.
The Digtial input SMS alerting modem gets information over digital interface from external device and automatically sends SMS if there is any out of normal situation.
In typical PLC applications, situations such as failure of particular component or out of normal situation needs to intimated to someone who can take corrective action.
The remote switch control modem provides a solution to control up to 2 external devices from remote location.
