ElectricThe SR2MOD03 is a Relay Sockets & Fixings ZELIO LOGIC GSM Modem manufactured by Schneider Electric. This modem provides user remote access to a connected Zelio Logic PLC controller, allowing users to control machines remotely over the GSM network. The SR2MOD03 features a power supply voltage of 7-24VDC, a communication port with serial TTL RS-232, plus multiple relay contacts and opto-isolated inputs, making it ideal for interfacing with a variety of applications and equipment. It is designed for use with the standard Simcard GSM networks, as well as the WebServer, SFTP, and SMS messaging. This modem is also suitable for M2M communication applications, allowing users to control and monitor machines on the premises, or over a wide area network.