They are identical. Input modules are installed right-side up. To convert them to outputs, install them upside down. That works for every single PLC on the market as well. Basically, the microprocessor in the controller has a bunch of pins connected to the backplane bus. The left hand side of every one of those busses in the world connect directly to the microprocessors INPUT pins. The right hand side connects to the processors OUTPUT pins.
Modern PLC microprocessors, even those manufactured up to about 15 years ago have auto-sensing circuitry to switch in resistors and voltage limiters so they can handle any input/output voltage from about 3VDC to 480VAC without any problem.