Introduction:

The DB9 Tester is the easiest way for you to test the connection on any male or female 9 Pin Serial connections. This adapter allows you to monitor the status of your connections by marking the...

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Product Review

Introduction:

The DB9 Tester is the easiest way for you to test the connection on any male or female 9 Pin Serial connections. This adapter allows you to monitor the status of your connections by marking them with LED's, which flash when there is activity on the pins. This device is easy to install, it features a Plug & Play Easy test RS-232 Host to Device link.

Pin Assignments:

  • DB - 9 / DB25 Pin assignment Pin1 / Pin8 : DCD < IN
  • Pin2 / Pin3 : RXD < IN
  • Pin3 / Pin2 : TXD > OUT
  • Pin4 / Pin20 : DTR > OUT
  • Pin5 / Pin7 : GND
  • Pin6 / Pin6 : DSR < IN
  • Pin7 / Pin4 : RTS > OUT
  • Pin8 / Pin5 : CTS < IN
  • Pin9 / Pin22 : RI < IN

Additional Features & Specifications:

  • RS-232 DTE connecter : DB9 - M
  • RS-232 DCE connecter : DB9 - F
  • Data rate : Up to 200 K bps
  • With GND & Shell Test's LED
  • Single / TTL out 1 - LED appear Green (V-)
  • Single / TTL out 0 - LED appear Red (V+)
  • Housing : Plastic
  • Weight : 55g
  • Dimensions (L*W*H) : 45 * 35 * 21 ( mm ) body

OS Support:

  • Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8
  • Linux and Mac OS 10.X


  • Standard RS-232 DTE & DCE Interface with DB-9 / F & DB-9 / M Connectors
  • RS-232 DB-9 / DB25 Pin assignment No Power required
  • Easy to install , Plug & Play
  • Double colors LED for easy cheeking of data transfer & receive
  • Works with Windows 7, 8, 10, Linux, Mac OS X

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