Sam Sirius 830, Инструкция по установке и быстрому запуску

Страница: 38 / 72

Sirius 830 Installation Manual www.s-a-m.com Power Supplies
Issue 2 Rev 2 Page 38 © 2016 SAM
8.3.1 48 V DC Power Out Cables
See sections 8.3.2 to 8.3.4 (depending on the number of power supply shelves used) for the
48 V DC connection details. The 48 V DC cables are supplied by SAM and can be ordered as
either 2.5 metre cables or 8 metre cables.
8.3.2 Single Power Shelf Connections
This connection method is suitable for a single power shelf fitted with four power supply units.
Two separate mains supplies should be used to maintain redundancy in the event of one
supply failing.
Important:
• All of the 48 V DC cables from the power supply shelves to the Sirius 830 router
must be the same length to ensure that the voltage drop along each cable is the
same at high currents.
• The power supply shelves MUST be isolated from the AC supply by means of the
external distribution switch/circuit breaker before connecting or disconnecting the
48 V DC power cables.
Fig 22. Power and Alarm Connections
There is one spare 48 V DC connector on the power supply shelf and two on the Sirius 830
router frame. Do not remove the covers of the unused connectors.
Note:
• The three 48 V DC power connectors on the power supply shelf are common. Any
two of the three sockets on the power supply shelf can be used to power the router.
• The four 48 V DC power sockets on the router frame are common. Any two of the
four sockets on the rear of the router frame 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
Connector
Protective Earth
AC Power Cables with
PowerCon Connectors
Mains
Supply A
Mains
Supply B