Film-Tech Forum ARCHIVE: Datasat H-404 board

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Posted by Tim Androes (Member # 9010) on 01-23-2019, 01:44 AM:

does anyone know the pin-outs for the three DB-25 connectors on this board? I've already tried Datasat.

H-404 A/B processor output select board

Posted by Carsten Kurz (Member # 5396) on 01-23-2019, 07:15 AM:

http://www.film-tech.com/warehouse/manuals/TN-H437A.pdf

As the board takes in the AP20's own analog audio output for switching, I would assume the DB25 pinout to be identical with the AP20 analog output. I have a H-404 manual filed somewhere, I am not sure if it is the same as the one above from the warehouse. I remember a picture of the board being shown in it. I will have a look. The current Datatsat people have nothing to do with this product, so they may have lost references to some of the more exotic addons.

- Carsten

Posted by Tim Androes (Member # 9010) on 01-25-2019, 02:00 AM:

thanks Carsten. i had figured the NC was mirrored to analog out, the NO was mirrored to analog in and the OUTPUT would be the same as the analog out. just wanted to verify for sure that that is the way it is. next time i am on site i will hook up; mine and the owners' schedules don't always match well. (private residence so no hurry)

Posted by Carsten Kurz (Member # 5396) on 01-25-2019, 04:44 AM:

The document I have on disc is the same as in the warehouse I linked to above. But I guess you'll have it sorted out. As far as I know, the switch is relay-based, and as such is bidirektional by design. The original intention was to have two different processors connected to the same amplifiers, and have the switchover under AP20 GPO control.

Don't know what they wanted to achieve by connecting one side to the analog in - looks like a classic recipe for a feedback loop.

- Carsten