An option for getting tally lights is to purchase a Logic Converter from http://www.henryengineering.com/logiconverter.html which will allow you to connect to tally lights. Each box will control up to 4 tally lights so for any 8 input TriCaster you will 2 LogiConvert boxes.
This part of the article describes how to wire LEDs to the SVGA Tally Connector on the XD850 and XD850 Extreme. Tally lights on the XD850 work by creating a simple circuit with an LED to light up when that channel is selected on the Live Row in the XD Live Production. If you reference the illustration and pinout below you will see that Pin 1 thru 8 are designated as LED 1 thru 8, those pins/LEDs are tied to channel 1 thru 8 in the XD Live Production channels 1 thru 8.
Steps to Fix/Workaround
Steps to Wire a Single LED Tally
The following are steps to creating a working Tally using a standard LED:
- Connect the Positive lead on the LED to the XD850 Tally Connector Pin for the specific channel you want to use (Pin 1 thru 8)
- Connect the Ground lead on the LED to one of the two ground pins on the XD850 Tally connector (Pin 9 or 10)
- Note: The XD850 Tally Connector only has Two Ground Pins, multiple connections can be grounded on each of these pins.
- Once the LED is connected to a specific channel pin and the ground, it will now illuminate when that channel is selected in the Live Production Software.
Below is the specific pin-out of the XD850 15 pin SVGA connector for Tally:
Pin1 – LED1
Pin2 – LED2
Pin3 – LED3
Pin4 – LED4
Pin5 – LED5
Pin6 – LED6
Pin7 – LED7
Pin8 – LED8
Pin9 – GND
Pin10 – GND
Pin11 – GPI1
Pin12 – GPI2
Pin13 – NC
Pin14 – 3.3V (with 20 Ohms current limit)
Pin15 – NC