Serial (RS232) and parallel loop back plugs

To make the loop back plug the following pins need to be connected together

• Receive and transmit (2 & 3)
• Request to send and Clear to send (7 & 8)
• Data carrier detect, Data set ready and Data terminal ready (1, 6 & 4)

This diagram shows the pinout connections that need to be made. It's the rear view of the female DB-9 connector that's required for the plug. The red lines and gray dots show the connections that need to be made.

To make the loop back plug the following pins need to be connected together

• Data 0 and Error status  (Pin 2 & 15)
• Data 1 and Select status  (3 & 13)
• Data 2 and Paper out status  (4 & 12)
• Data 3 and Acknowledge status  (5 & 10)
• Data 4 and Busy status  (6 & 11)

This diagram shows the connections that need to be made. It's the rear view of the male DB-25 connector that's required for the plug. The red lines and gray dots show the connections that need to be made.

Cabling

No cabling is required as these plugs are designed to connect directly to the back of a PC. If a cable is used, then it should be a straight through cable.

Compatibility

Window 98, ME, 2000, 2003, XP (32-bit and 64-bit), Vista (32-bit and 64-bit), 2008 Server (32-bit and 64-bit), Windows 7 (32-bit and 64-bit), Windows 8 (32-bit and 64-bit), Windows 10 (64-bit) and Linux platforms are supported, provided you have the correct version of BurnInTest.

In order to use the plugs with Windows,  BurnInTest Professional v2.0 or above is required. For Linux, BurnInTest for Linux v1.0 or above is required.

As there are several ways to build loopback plugs, we can not guarantee the compatibility of our plugs with any software except BurnInTest Professional.