The connectors are 9-pin D (D9).
The cable is always male on both ends (D9-M).
D9C-M is male crimp and D9S-M is male solder.
Store-bought cables are usually wired straight through, pin for pin with all
the pins connected, but there are only four pins that must
go through for the cable to work; 2, 3, 7, and 8.
These are the pin names that Sony uses on its play machines.
1. Frame Ground
2. Transmit A
3. Receive B
4. Receive Common
6. Transmit Common
7. Transmit B
8. Receive A
9. Frame Ground
Pins 2 and 7 form a pair and must be twisted together on long runs.
Pins 3 and 8 form a pair and must be twisted together on long runs.
All of the commons and grounds are nice and manditory on long runs, but
but I got an emergency editor package to work without them using just the two
transmit and two receive wires strung across the floor.
The RS-422 specification is for cables thousands of feet long.
For that to work, you do have to pay attention to the commons, shields,
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