DB-9F null modem

by nsayer.
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2 layer board of 0.65x0.60 inches (16.51x15.27 mm).
Shared on January 29th, 2014 23:45.

RS-232 null modem adapter board.

Edge-solder two DB9F connectors on either side of the board (DigiKey 4209FE-ND, for instance) and you get an RS-232 null modem. The pinout:

  • TXD<->RXD
  • RTS<->CTS
  • GND<->GND
  • DTR->DSR+DCD (x2)
  • RI->nc (x2)

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