PACKAGED INTRINSIC SAFE INDUSTRIAL MODEM

A packaged cellular modem system includes a capacitor 110 for receiving power from a DC power source 160, a DC-to-DC converter 115 is coupled capacitor electrodes 110a, 110b, a cellular modem 130 is coupled to the converter output and to an antenna 135, and an IS barrier circuit 120 is coupled to a modem output. A microcontroller 140 coupled to a boost regulator 145 has its output coupled to electrodes 110a, 110b. A metrology jumper 165 is between the microcontroller and ground. An encapsulation material 142 provides a potted area for the capacitor, converter, modem, IS barrier circuit and microcontroller. A SIM card 125 is coupled to the modem by the IS barrier circuit. LED's 155 are coupled to the microcontroller 140. The SIM card and LEDs are in a non-potted area 148. A transparent SIM card access cover over the SIM card and LEDs enables exposing the SIM card.