7750 SR-a Chassis Components
38 7750 SR-a4 and SR-a8 Installation Guide
7750 SR-a Chassis Components
The 7750 SR-a chassis are shipped empty and the components must be installed. See the
following subsections:
• PSUs on page 38
• Fan Trays on page 40
• Air Filters on page 42
• Impedance Panels on page 43
• Component Operating Requirements on page 44
PSUs
The 7750 SR-a4 and 7750 SR-a8 chassis are designed to accommodate swappable,
load-sharing Power Supply Units (PSU).
Two types of PSUs are available, as listed in Table 7: one for universal AC power feeds and
one for –48 VDC power feeds.
Each PSU is rated at 1600W when operating from DC power and high-line AC power feeds.
When operating from a low-line AC power feed, the AC PSU is rated at 1000W.
You must supply your own power cables. Verify that the cables are compliant with your local
safety code. PSUs have no field-replaceable parts. You must replace the entire unit in the
event of a failure.
7750 SR-a AC PSU
Figure 8 shows the 7750 SR-a AC PSU.
Table 7: PSUs
Chassis Power Supply Unit Part Number
7750 SR-a4 and 7750 SR-a8 PSU - 7750 SR-a AC 3HE09200AA
PSU - 7750 SR-a –48V 3HE09199AA
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