Installation Manual
H3C S9500 Series Routing Switches
Chapter 1 Product Overview
1-7
I. Functions
The following are the main functions of the backplane:
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Providing communication channels for signal exchange between boards
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Supporting board hot-swapping
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Supporting board auto-discovery in slots
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Connecting PSUs to distribute power SRPUs, LPUs/service boards, and fan tray(s)
and providing monitor channels for them.
II. Structure
The S9500 series use a passive backplane, which provides multiple board slots, one or
two fan interfaces, and two –48V power interfaces (one for PSUs and the other for PoE
power entry module).
1.2.3 Power System
Note:
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The S9500 series support both AC and DC power inputs. So you can choose AC or
DC PSUs as needed.
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The S9500 series support 1+1 power supply redundancy.
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The PSUs of the S9500 series are hot-swappable.
The power system is at the bottom of the chassis. In the PSU slots, you can insert either
two AC PSUs or two DC PSUs. The PSUs are cooled by the built-in fans, which draw
air into the chassis from the front and exhaust air from the rear.
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AC PSU
Table 1-1
Specifications for AC PSUs
Specifications
Item
NEPS600-A
NEPS1200-A
NEPS2000-A
NEPS3500-A
Model S9502
S9505
S9508/S9512 S9508/S9512
Rated
voltage
range
100 to 240 VAC,
50 Hz or 60 Hz
100 to 240 VAC,
50 Hz or 60 Hz
100 to 120 VAC,
60 Hz
200 to 240 VAC,
50 Hz
100 to 240 VAC,
50 Hz or 60 Hz
Input
voltage
range
90 to 264 VAC,
50 Hz or 60 Hz
90 to 264 VAC,
50 Hz or 60 Hz
90 to 264 VAC,
50 Hz or 60 Hz
90 to 264 VAC,
50 Hz or 60 Hz