Manual switching controls, Gpi program output controls and monitoring, For a complet – Grass Valley 8972PX User Manual
Page 13
8972PX — Instruction Manual
13
Configuration Summary
Manual Switching Controls
The following manual switching controls are described in detail in this sec-
tion:
•
GPI Program Output Control and Monitoring
•
Web Page Control (
•
Newton Control Panel (
•
)
•
Front Edge Pushbutton Controls (
)
GPI Program Output Controls and Monitoring
The Program Output selection can be controlled through the SubD-25 GPI
I/O connection mounted on the rear module when wired to an external
customer-supplied GPI control device. Switching is activated by contact
closure. The GPI controls work directly on the front module to select the
Program Output. Primary, Secondary, and Alternate input signal status can
also be reported to the GPI interface through tally connections.
The four switching control lines from the customer-supplied device and the
six input status reporting lines from the front module are shown in
.
Figure 2. GPI Interface
GPI I/O
Rear Module
GPI I/O Connection
External
GPI Interface
Switch to Primary
Primary is Active
Primary Not Good
Secondary is Active
Alternate is Active
Secondary Not Good
Alternate Not Good
Switch to Secondary
Switch to Alternate
GPI Exclusive Control
Receives Primary, Secondary,
and Alternate status
from Front module
and sends switching
commands to front module
through rear module
GPI I/O connector
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