P
Peter
- Jan 1, 1970
- 0
I am developing a product which is to drive a Sony or similar VTR.
I have the DB9 connector pinouts
1 GND
2 RXA
3 TXB
4 GND
5 GND
6 GND
7 RXB
8 TXA
9 GND
and it's working OK.
However, for an unrelated purpose I need to know whether the RS422
product being controlled actually connects to *all* the pins marked
GND.
I believe the straight-through DB9-DB9 cable normally used in these
applications does have all nine pins connected through, but is it
normal for the device itself to have GND on all of them?
I have the DB9 connector pinouts
1 GND
2 RXA
3 TXB
4 GND
5 GND
6 GND
7 RXB
8 TXA
9 GND
and it's working OK.
However, for an unrelated purpose I need to know whether the RS422
product being controlled actually connects to *all* the pins marked
GND.
I believe the straight-through DB9-DB9 cable normally used in these
applications does have all nine pins connected through, but is it
normal for the device itself to have GND on all of them?