Schneider Electric Modicon® M340 Processor Module, CPU, Memory: 1024 Discrete/256 Analog, 1024 I/O Multi-Rack, 704 I/O Single Rack Maximum I/O, 256 Multi-Rack/66 Single-Rack Configuration Input/Output, USB, Modbus, SERIAL and Ethernet-Modbus, TCP Communication Ports, Rack Mounting, 0 to 60 deg C Operating