RS232 Monitoring

Post by **xol** » Fri Oct 14, 2011 9:21 pm

To monitor half-duplex RS232 communication with SUB-20 (or PC) you can use Monitoring Dongle presented below. Dongle has 3 DB9 connectors. Left and right are pass through connectors and bottom one is a monitor connector. The data passing between pins 2 and 3 of the left and right DB9 connectors in both directions can be viewed at the bottom connector at pin 2.

Schematics

: RS232-monitor-sch.jpg (24.35 KiB) Viewed 48249 times

Monitoring Dongle

: RS232-monitor.jpg (63.65 KiB) Viewed 48249 times