Figure 13 on – Grass Valley 8972PX User Manual
Page 38
38
8972PX — Instruction Manual
Installation
Figure 13. GPI Input I/O Typical Circuit Using Open Collector
GPI
Exclusive
Control
2.21k ohm
4.75k ohm
Open
Collector
Front Module
Rear Module:
GPI In 25-pin
Connector
Pin Numbers
16
GPI In
Switch to
Primary
Open
Collector
14
+12V
+3.3V
0.1uF
GPI_EX_CNT
GPI_SW_P
GPI In Typical
GPI In Typical
GPI In
Switch to
Secondary
Open
Collector
GPI In
Common Gnd
GPI_SW_S
GPI In Typical
GPI In
Switch to
Alternate
Open
Collector
19
GPI_SW_ALT
GPI In Typical
8580_05
r1
15
13
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