TX HMI/PLC Series. Plug-In Module. 8 DI, 6 DO, 1 Relay Output. Ident. no.: 6828203. Plug-in extension module for use with HMIs of the TX700 and TX800 product series. I/O module. 8 digital inputs, 24 VDC, PNP. 6 digital outputs, 24 VDC, 0.5 A, PNP. 1 relay, NO contact