Grass Valley 8972PX - Manual (Page 39)

8972PX — Instruction Manual 39
Installation
GPI Relay Status Monitoring
The rear module GPI I/O connector also provides tally connections to
report to the external GPI device the input signal status of what input signal
is currently on the Program output and if any of the input signals have
failed. The Program output active and failure reporting status of the Pri-
mary, Secondary, and Alternate inputs can be monitored by the GPI device.
The solid state relays are bi-directional; either polarity voltage can be
applied. It can be used to drive downstream DC relays. Each tally output is
active on a steady closure state.
Examples are given in Figure 14 on page 40 for both logic connections and
12V lamps to an external system. Refer to Table 7 on page 35 for a complete
list of GPI function pin numbers.
Relay outputs specifications are maximum current of 0.5A (continuous) or
1.5A peak (100 ms), 60V peak load voltage.