Moxa’s OnCell G3111 and G3151 are cellular IP modems designed for power system automation.
Both devices come with a full TCP/IP architecture, enabling simple transparent cellular connections to legacy devices over TCP/IP networks. They not only provide multiple operation modes, including TCP server, TCP client and UDP, but also offer the flexibility of three types of GSM/GPRS connection modes: always ON, inactivity timeout and remote host recovered. The cellular interface of the modems operates over the universal quad-band GSM/GPRS 850/900/1800/1900 MHz frequencies.
Many cellular ISPs only provide private IPs for their customers, and this IP address can change frequently. This is a substantial system management hurdle as the connection between the host and the device is broken unless the IP address is reconfigured in the cellular IP modem. The OnCell Central Manager software included with the G3111 and G3151 greatly simplifies system management by solving this private IP issue. As long as the control centre is connected to the Internet, it can connect to remote metering devices; remote devices configured with a private IP address such as AMR meters can access resources on the Internet, and can be managed or accessed directly on a private network or over the Web.
The cellular IP modems are compact, and can be used on a desktop or mounted on a DIN rail. The products come with flexible 12 to 48 V d.c. power input and 2 kV EFT/surge protection to accommodate whatever field power sources are available. Their serial ports are protected by 15 kV ESD line protection to keep the system safe from unexpected electrical discharges.
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