Gate Arm Question

For those of you with experience installing gate arms that are triggered by roadway loops, I need some help.

Have you ever tied the output of the loop detector to a REX input on your access control system? I am working on a design for one of our teams in Panama, and my thought here was that it could be a useful troubleshooting tool for the administrators that work from the USA to see if the loop/detector are functioning properly.

I will have an entry arm controlled by card reader (or alternatively by manual action once the guard checks ID) and an exit arm controlled by a loop which is where I was thinking of using the REX input. Does that make sense or am I losing it today?

One follow up question, is it common practice to also include an loop on the inbound arm in case traffic gets diverted to the other lane or would that create added complexity for no real benefit?

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