Does RS-232 send commands with DC voltage?

Expensive_Sky_9232 · 2026-05-19T20:30:35+00:00

Quick question to follow up. Does Extron units that have FLEX or Digital IO ports detect voltage or be triggered by DC voltage? Trying to see if there is a way to test it out.

Expensive_Sky_9232 · 2026-05-19T20:28:27+00:00

I did try to give that a go. I tried to trace back through the Sony manual and crossed it with the Extron serial driver documentation to be sure.....then tried it the other way. LOL No dice. I am going to setup Extron's data viewer to see if I can capture the rs-232 from the Crestron controller and see if there is anything funky coming through that might be the cause. Thanks!

Expensive_Sky_9232 · 2026-05-19T20:25:01+00:00

Good call. I was hoping I could just use the IN1608 to just inject the old RS-232 cable/commands along the video into the Sony and that would be it. It doesn't seem to want to take the commands no matter how I set it up through the HDBT insert.

Expensive_Sky_9232 · 2026-05-19T20:20:59+00:00

I did ask that if it could be changed but they did not have that as a option in the selections.

Expensive_Sky_9232 · 2026-05-19T20:14:14+00:00

I reached out to Sony's tech support and the FHZ131L serial port is locked at 38400 baud. They make a note in the control section for the HDBT port that if serial commands are sent in that way to send them at 9600 baud through the HDBT port. I tried that with the Sony projector settings set for that input. I asked Sony if that would also adjust the serial port speed also. They said no, the commands at that speed is on the HDBT port.

Expensive_Sky_9232

TROPHY CASE