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Old FIRST radio pin-out?
Anyone know the pin-out for the RS422 radio link used in past years? I found this thru Google, but it was stated that's there's no real standard, so I don't know if theses radios are the same:
Pin Function
1 No Connect
2 –Rx (RS-232), –Tx (RS-422)
3 –Tx (RS-232), –Rx (RS-422)
4 +Rx (RS-422)
5 Ground
6 +Tx (RS-422)
7 No Connect
8 No Connect
9 Ground
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