Relay-protected program output, Program output, Gpi i/o connector – Grass Valley 8972PX User Manual
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8972PX — Instruction Manual
Installation
Relay-Protected Program Output
The Relay-Protected Program Output at BNC J7 is the main Program
Output for the module. It wired to the relay-protected passive bypass cir-
cuitry on the rear module which includes the Primary and Secondary
inputs as part of the relay path, assuring a continuous output source. Refer
to
Passive Bypass Only Mode on page 26
for an explanation of the bypass
mode.
Note
To assure the bypassed Program Output signal meets the correct specifica-
tions, read the section on determining cable length in
.
Program Output
The Program Output at BNC J5 outputs the current Program Output signal
from BNC J7, the Relay-Protected Program output, when the module is not
in bypass mode. In bypass mode, the output at J5 is not active.
Outputs 1.1 and 1.2, Outputs 2.1 and 2.2, Outputs 3.1 and 3.2
Three sets of programmable output pairs (Outputs 1.1 and 1.2, Outputs 2.1
and 2.2 and Outputs 3.1 and 3.2) can be configured to output the Program,
Backup Candidate, Primary Input, Secondary Input, or Alternate Input
signal as desired. Programming of these output pairs is done on the Output
Control web page (
Output Control Web Page on page 62
) or using the
Newton Control Panel (see
GPI I/O Connector
The Program Output from the front module can be controlled and moni-
tored through the SubD-25 GPI I/O connector on the rear module using an
external customer-supplied GPI interface. Due to the densely populated
rear module, a custom designed optional SubD-25 connector (8900PX-DBS)
is available from the factory in order to allow space for using a trumpeter
tool for connecting signals to adjacent BNCs (see
For using a standard SubD-25 connector, the following maximum dimen-
sions are recommended:
•
Maximum width of 15 mm
•
Maximum length of 57 mm