TX HMI/PLC Series. Plug-In Module. 20 DI, 12 DO 0.5 A ,4 AI (U, I, RTD, TC), 4 AO (U, I). Ident. no.: 6828201. Plug-in extension module for use with HMIs of the TX700 and TX800 product series. I/O module. 20 digital inputs, 24 VDC, PNP. 12 digital outputs, 24 VDC, 0.5 A, PNP. 4 analog inputs, U, I, RTD, TC. 4 analog outputs, U, I