The Guard - security system in Programs Posted May 16 The IO module allows to send or receive redstone (or bundled cables from Project Red) signals via Redstone I/O block. Output signals are set using sources whereas input signals are detected by sensors. Those are the names of views in the IO module. Everything is controlled by actions so if you want to set up a piston doors, define a source (IO module) that is connected to those doors and then trigger an action setting redstone output on that source with, for example, bio reader or keypad (AUTH module, OpenSecurity mod). The list of steps necessary to set up a piston doors is described in the wiki.