GRASS VALLEY KARRERA - Tally;Gpi Outputs

76 KARRERA — Installation & Service Manual
Section 4 — System Cabling
Figure 44. GPI Input Connections (Typical 2 of 8 Connections)
The function of each GPI input is user assignable. A function can be pro-
grammed to occur on the leading edge or the trailing edge of the closure,
or both edges. The switch must be closed for at least one field.
Tally/GPI Outputs
Tally and GPI Outputs are arranged in groups of four. Each group has its
own common connection. These commons can all be tied together, forming
one common bus for all the outputs. Alternatively, multiple smaller
commons can be constructed to interface with systems that need isolated
common connections. This common or isolated bus scheme can extend
across multiple connectors. For example, a situation may require two iso
-
lated common busses, half of the commons form the first common bus and
the other half form the second common bus.
50-pin Connector
Pin Numbers
Opto Isolator
(1 of 8)
GPI IN 1
GPI IN 5
+ 3.3 V
Open
Collector
18
35
19
36
20
4
1
34
3
2
150 ohm
Opto Isolator
(5 of 8)
Ground and
Chassis
User Equipment
+ 3.3 V
150 ohm
8623266_45
Video Processor Frame