Sam Sirius 830, Инструкция по установке и быстрому запуску

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Sirius 830 Installation Manual www.s-a-m.com Power Supplies
Issue 2 Rev 2 Page 36 © 2016 SAM
In all router configurations, a non-redundant Sirius 800 router uses one or more power supply
shelves fitted with multiple PSU’s. A failure of any one of these PSU’s is considered a failure
of the power feed to the router.
For example:
A Sirius 830 for 220-240 V AC mains supply operation is supplied with:
• One shelf containing two PSU’s for power feed A.
• Plus two PSU’s for power feed B.
A failure of either PSU connected to power feed A is considered a failure of power feed A.
In this case, operation of the router on power feed A with one PSU is not guaranteed.
PSU’s in a power supply shelf will actively power-share, equalizing the load on each PSU.
If one or more PSU’s in shelf A fail, each remaining PSU can draw up to 25 A from the AC
supply.
At higher AC supply voltages (220-240 V AC), in the event of one PSU failure, the current
drawn by the remaining PSU’s may exceed the 15 A rated operating current.
This is outside
normal operating conditions for this AC supply voltage.
Depending on the installation, circuit breakers on the remaining PSU’s may trip. In this case,
power shelf B is required for redundant operation.
Installing the PSU’s with 25 A rated breakers and cabling means that in the event of one PSU
failing, other PSU’s will not draw current beyond the breaker rating and will continue to
operate. This can offer an additional level of PSU resilience beyond normal 1+1 redundancy.
Installation should take these factors into account. Installation should be done in accordance
with local and national electrical codes. This product is pluggable type B (IEC 60309).
The power supply shelf outputs 48 V DC and the power supply units current-share on the
output. Each power supply shelf has three 48 V DC connectors at the rear but only two are
used (see Fig 21.). The power supply shelf can generate alarm signals to indicate presence
and output status.
• Do not obstruct the air vents situated on both sides of the power supply shelf, and
allow a minimum of 50 mm (2 inches) clearance to allow air flow. The air that is
exhausted from the sides must be able to flow past the rear of the power supply
shelf without being obstructed.
• The power supply unit is heavy weighing 24 Kg (53 lbs). When lifting use the
correct local Health and Safety lifting guidelines.
Fig 21. Power Supply Shelf Rear Panel
Functional
Earth Point, see
section 2.7.2
PowerCon AC Input
Connectors x 4
48 V DC power
connectors Protective Earth
Point, see
section 2.7.1
25-Way D Type
Alarms Connector