Sam Sirius 830, Installation And Quick Start Manual

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Sirius 830 Installation Manual www.s-a-m.com Power Supplies
Issue 2 Rev 2 Page 40 © 2016 SAM
8.3.4 Alternative Dual Power Shelf Connections
This connection method is suitable for systems with two power shelves and is often used
when a system is expanded from one power supply shelf to two power supply shelves.
Two separate mains supplies should be used to maintain redundancy in the event of one
supply failing.
Note:
An individual power supply shelf cannot be isolated when connected in this configuration. If
you need to be able to isolate an individual power supply shelf the mains supplies should
be connected as described in section 8.3.3.
Fig 24. Power and Alarm Connections
There is one spare 48 V DC connector on each power supply shelf. Do not remove the
covers of the unused connectors.
Note:
The three 48 V DC power connectors on each power supply shelf are common. Any two of
the three sockets on each power supply shelf can be used to power the router.
Functional Earth Stud
48 V DC Power Connectors
25-Way
D-Type Alarm
Connection
Functional
Earth
PSU Alarm
Connectors
Protective Earth
AC Power
Cables with
PowerCon
Connectors
Protective
Earth
Mains
Supply A
Mains
Supply B
Mains
Supply A
Mains
Supply B