Below, you can see the entire back panel, including the small control panel in the lower left corner. The SIM2 Nero 3D-2 has a good complement of inputs, but, other than possessing three, yes, count them, 3! 12 volt triggers, the options for the Nero projector are pretty standard.
There is, of course, the usual two HDMI 1.4a inputs (top left). Further to the right, are the 3 color coded RCA jacks for a component video input, and next to them, a white RCA jack labeled HV for an RGBS sync signal, if needed.
Next is a DIN input for the external 3D emitter, and to its right, the last RCA jack (yellow) for composite video.
As we continue moving right, next is an HD15 connector labeled Graphics RGB, which, if this Italian projector was made in the US, would read Computer Input, or something similar. This is your standard analog computer input, and it should be able to function as a 2nd component video input, if that's your need. Next are the command and control jacks including a USB and an RS-232. Both are there for your command and control needs, and either can be used to update firmware as needed.
Moving to the short second row, you'll find the three screen triggers below the HDMI inputs, and above the control panel.
Why three screen triggers, you ask? The idea is one for your motorized screen, if you have one. The second one could be used for controlling a screen masking system, and the third Nero 3D-2 projector screen trigger would be used for controlling the motorized sled of an anamorphic lens.