Sirius 800 Series User Manual
Power Supply Redundancy
Router Power Supply Shelf Requirements B.1
Iss 5 Rev 7
Page 304
© 2017 SAM
Appendix B Router Power Supply Shelf Requirements
B.1 Power Supply Redundancy
To ensure full dual redundancy, half of the power supplies should be powered from a separate
power source to the other power supplies. Under normal operating conditions with dual power
sources, each power supply unit runs at less than 50% loading.
B.1.1 Sirius 830: Power Supply Shelf Requirements
The number of power supply shelves should be selected based on the mains supply
operating voltage and router configuration, see Table 92 for information.
See Appendix B.2 for power shelf, PSU and power cable order codes.
To reduce the risk of electric shock, plug each power supply shelf into separate branch
circuits employing separate service grounds.
Sirius 830 Router Configuration
Mains Supply
(V AC)
Number of Power Supply
Shelves and Units Required
for Redundancy
Typical router configuration of less than 12
video AHP modules
(5919/5949/5915/5925) fitted in the router
100 - 120 V AC
Nominal
1 Shelf
4 Power Supply Units
2 DC Cables
If 12 or more video AHP modules
(5919/5949/5915/5925) are fitted in the
router
100 - 120 V AC
Nominal
2 Shelves
6 Power Supply Units
4 DC Cables
All router configurations
220 - 240 V AC
Nominal
1 Shelf
4 Power Supply Units
2 DC Cables
Table 92
Sirius 830 Power Supply Redundancy
Important:
•
If the Sirius 830 router is expanded from its initial configuration check Table 92 to
see if extra power supply shelves are required.
•
It is the responsibility of the Sirius 830 installer to ensure any AC power
requirements are met.
