Specifications

Mica Installation Planning Guide - Sept 2011
Page
25
Tally
Standard Tally
The standard tally uses the Tally connector on the Mica
System which is marked Tally /GPIO These outputs are open
collector driver circuits that can either sink current to ground
or provide a TTL level logic interface.
#28 – Tally Box 8: Adds relay contacts to tally up to 8 sources. Connects to the
server through a USB connection. Voltage needs to be supplied to the tally box
from your camera controls units or other source for the tally to open and close
the contact points. This option also supports up to 8 GPIs, useful when needing
to trigger macros in the Broadcast Pix system from an external device.
Optional Tally
While standard tally will suffice in many studios, if you need to provide a stronger electric pulse to your cameras,
then the following tally options should d be used:
Tally outputs 1-8 are on pins 1-8, Ground is on pin 13. They
sink current to ground when active and have a weak pullup to
+5V when off so they can either be used to turn on a light or
activate a circuit by sinking current to ground or could be used
in an environment that is looking for a 0 to + 5V logic level.
GPI and GPO connections are also on the Tally connector
as shown.
Tally/GPIO
Interface