Fatek M series Main Unit, General Motion, 16x16 DI/DO, Transistor SINK (NPN) Output, Max. I/O: 2048/256, 24 m.c. axes, 1 10/100 Base-T Ethernet Port, 2 RS-485 Terminal Port (Master/Slave), 1 USB Type-C (2.0) Port, Power Supply 24 VDC. IoT Compatible.