Schneider TM221M16T 16 8 transistor 2 fast output Logic controller 8, discrete input 4 fast input IEC 61131-2 Type 1 24 V Transistor 2 0-10 V 10 bits 256 kB user application and data RAM 10000 instructions, 256 kB internal variables RAM 24 V DC terminal block, 3 for connecting the 24 V DC power supply, connector, 4 for analogue inputs, Mini B USB 2.0 connector for a programming terminal, removable screw terminal block, 10 for inputs, removable screw terminal block, 11 for outputs USB port mini B USB 2.0, Non isolated serial link serial 1 RJ45 RS485, Non isolated serial link serial 2 RJ45 RS232/RS485 Top hat type TH35-15 rail IEC 60715, Top hat type TH35-7.5 rail IEC 60715, plate or panel with fixing kit USB port USB - SoMachine-Network, Non isolated serial link Modbus master/slave - RTU/ASCII or SoMachine-Network IP20 with protective cover in place Modicon M221 Nano PLC Logic Controllers