RS-232 Serial Port
I opened up the inspection checklist this morning and found the following entry:
Custom Circuits, Sensors and Additional Electronics - may not connect to the cRIO’s serial or Ethernet 2 ports (except in compliance with R69), ...
We have an embedded computer that feeds data to the cRio over the serial port, a setup we've used in the past without violating inspection rules. R69 only talks about the CAN bus, so according to the checklist we cannot connect to the RS-232 port. However, R72 lists the DB-9 RS-232 port as one of the valid connections for a custom circuit. I don't see anything else in the game manual that prohibits use of the serial port, and R72 seems to allow it, so is this just an error on the checklist?
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Putting 2 and 2 together, and then mixing them back up for someone else to try and get 4 in a different way is just plain fun. - Elgin Clock [more] 
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