Vision TC3 Manual Del Producto página 7

Commands are normally published in the back of the device manual. Codes are expressed in
Hexadecimal for ASCII format. The programming software shows both:
RS-232 Requires two wires and a ground, so shielded minijack cable is commonly used.
Tx is normally wired to Rx. Extron requires Tx to Tx. If you are sending codes and they don't work
try swapping the Tx and Rx on the Techconnect Control.
Male 9-pin Connector:
7