GRASS VALLEY KARRERA K-FRAME, Инструкция по установке и обслуживанию, Страница: 90 / 278

90 KARRERA K-FRAME — Installation & Service Manual
Section 4 — System Cabling
Figure 59. GPI Input Connections (Typical 2 of 8 Connections)
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 buses, half of the commons form the first common bus and
the other half form the second common bus.
50-pi n Co nn ecto r
Pi n N u mbe rs
Opto I s olato r
(1 of 8)
GPI IN 1
GPI IN 5
+ 3.3 V
Ope n
Collecto r
18
35
19
36
20
4
1
34
3
2
150 ohm
Opto I s olato r
(5 of 8)
G r o un d a n d
Cha ss i s
U s e r Eq u ipme n t
+ 3.3 V
150 ohm
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