Power Supply User Manual

Chapter 3: FR-6804/FR-6804-1 Frames Overview
12 6800/7000 Series - Frames and Power Supplies Installation and Operation Manual
The GPI is made up of two parts:
• A fault sensing circuit within each power supply that monitors the
primary circuit and the two output voltages.
• A relay that provides isolation between Leitch equipment and the
GPI output connector at the rear of the frame.
There are three connections provided for GPI reporting:
•Normally closed (NC)
• Normally open (NO)
•Ground
To comply with SMPTE standards, the product uses the NC output and
ground. The relay has two states for GPI reporting:
• OPEN: An open output signifies that the GPI relay is activated and the
power supplies in the frame are present and operating correctly.
• CLOSED: A closed output signifies that the GPI relay has been
de-activated indicating an internal fault in either of the power
supplies or a loss of power to one or both of the supplies.