View Full Version : Tally Help

09-11-2005, 06:27 AM
We are using Datavideo TLM404 monitors, these are closed contact. How would I convert the VT4 5v Tally system to work with these monitors?

Hope this makes sense the datasheet for these monitors can be found here TLM404 PDF (http://www.datavideo.info/support/manuals/TLM-404.pdf)

Hope someone could be good enough to help me out :help:


Jim Capillo
09-11-2005, 07:15 AM
Here is a diagram from another thread.....

I don't know what it would take to get to get the signal across, but you could use the info to get started and do some experimentation.


1 / LED 1
2 / LED 2
3 / LED 3
4 / LED 4
5 / LED 5
6 / LED 6
7 / LED 7
8 / LED 8
9 / GND
10 / GND
11 / No Connect
12 / GPI 0
13 / GPI 1
14 / 3.3 volt power
15 / No Connect


The LED outputs are current sinking (goes low when active) and you should
use at least a 200 ohm current limiting resistor in series with an external
LED. There is also a 200 ohm resistor in series with this signal inside BOB.
These LED signals are just copies of the tally LEDs on BOB.

The GPI pins can support a normally open switch between the GPI pin and

There is 20 ohms of series resistance on the 3.3 volt power pin

09-14-2005, 02:22 PM
You are all set!

The inputs on the TLM-404 are contact to ground, as ar the outputs on the video toaster.. do this: interconnect the comon grounds of both systems (this is actually allready done if you have a video cable running anywere between them, but do it anyway) then connect each output pin from the VT to teh corresponding red input pin on the TLM-404.
That shoudl do it!

- Mikko