NewTek TriCaster Mini - Section 3.9 Tally Lights; Connection Details

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SECTION 3.9 TALLY LIGHTS
TriCaster’s Tally Light support allows you to connect external tally
lights and similar devices. These typically provide a red LED for the
video input that is currently selected on the Switcher’s Program row.
(Not a TriCaster Mini SDI or Mini feature.)
Note: Tally over SDI, as supported by devices from Blackmagic Design, is natively
suported, and requires no special configuration. Please see also: Section 22.9 regarding
GPI support to trigger tally (and more); or search among third party tally solutions listed at
http://www.newtek.com/solutions/newtek-developer-network/all-partner-list.
3.9.1 CONNECTION DETAILS
Here is a pin-out listing for TriCaster’s HD15 Tally connector:
 Pin1 – LED1
 Pin2 – LED2
 Pin3 – LED3
 Pin4 – LED4
 Pin5 – LED5
(8-input only)
 Pin6 – LED
 (8-input only)
 Pin7 – LED7
(8-input only)
 Pin8 – LED8
(8-input only)
 Pin9 – GND
 Pin10 – GND
 Pin11 – GPI1
 Pin12 – GPI2
 Pin13 – NC
 Pin14 – 3.3V
(20 Ohms current limit)
 Pin15 – NC
ENGINEERING NOTES
 Pins 1-(4 or 8) are ‘hot’ when the LED should be illuminated.
 Each LED pin 1 (4 or 8) has a 200 ohm current limiting resistor inside TriCaster.
 With no load (open circuit) the LED pins can reach 5V. With a typical LED load,
they can be expected to reach about 3V.
 GPI stands for General Purpose Interface. Pins 11 and 12 are assigned for possible
future use as GPI1 and GPI2 connections, but support for GPI triggers has not been
implemented in TriCaster at this time.)
 To prevent damage to TriCaster’s components when making external connections
to the tally light jacks, care should be taken that connection to Pins designated
GND (Ground) are always at ground potential.
FIGURE 18