I am new to Fanuc robots and have been slowly building and assembling a machine to assemble one of our products. I have pre-assigned IO on rack 48 slot 1 start 1 which is DI 101-120, my standard 20 inputs on the Honda plug and then there are DI's 81-88 assigned to Rack 48 slot 1 start 21. I have no idea where start 21 is in terms of physical connection. Any ideas? The outputs also have the same 20 (DO 101-120) and 8 (DO 81-88). The 20 are also assigned to the rack 48 slot 1 start 1 and 8 assigned to start 21. I woudl like to use these extra 8 if it's possible as I am all maxed out on my current inputs 1-12 assigned to DO and 13-20 assigned to UOP to give my fist 8 UOP inputs that I can use to start and reset the robot cell once the door closed and safety raised. great slide show with pinouts of 58 & 59 connectors https://studylibfr.com/doc/10070301/fanuc-educational-cell-exercises