Figure 12 – Grass Valley 8972PX User Manual
Page 37
8972PX — Instruction Manual
37
Installation
Figure 12. GPI Input I/O Typical Circuit Using Relays
GPI
Exclusive
Control
2.21k ohm
4.75k ohm
Front Module
Rear Module:
GPI In 25-pin
Connector
Pin Numbers
16
GPI In
Switch to
Primary
14
+12V
+3.3V
0.1uF
GPI_EX_CNT
GPI_SW_P
GPI In Typical
GPI In Typical
GPI In
Switch to
Secondary
GPI In
Common Gnd
GPI_SW_S
GPI In Typical
GPI In
Switch to
Alternate
GPI_SW_ALT
GPI In Typical
8580_07
r1
15
19
13
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