Thread: Need pinout for tether adaptor
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Unread 23-06-2002, 21:55
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#0047 (ChiefDelphi)
  
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Tether Adapter is not a standard Null Modem Adapter!
Posted by Eric Rasmussen, Engineer on team #-1.5 from FIRST.

Posted on 3/1/99 6:53 PM MST


In Reply to: Re: Need pinout for tether adaptor posted by Jeremy M. Husic on 3/1/99 11:36 AM MST:



: : Help! I need to know if the tether adaptor that came with the kit is basically a gender changer or do I have to make a connector box for it?? If i have to make one, anyone know the pinouts??? I seemed to have misplaced it.
: : Thanks in advance.

: If you do not want to make it, you can buy an equivalent at Radio Shack.
: Since the FIRST adaptor is really acting as a null modem adaptor and
: gender changer, you can buy both at Radio Shack: null modem adaptor
: DB9 male/DB9 female (part #26-264) and gender changer DB9 female/DB9
: female (part #26-266).

: Unfortunatly Radio Shack does not sell a null modem adaptor female /
: female, which is really the FIRST adaptor.

No no no! The tether adapter is only the same as a null modem adapter in concept. Pin 4 on both the Transmitter Box and Receiver Box is the power output for the RNets. If you use a standard Null Modem Adapter, you risk connecting pin 4 to something not designed to sink > 1A of current.

Please use only an adapter with the correct wiring. The correct wiring (pin to pin) is:

2 -> 3
3 -> 2
5 -> 5

That is all there is to the tether adapter.



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