Features
1-4 Introduction
Features
S-Series Modules
The S4 chassis supports S-Series S130 and S155 I/O fabric modules and I/O modules, with some of
these modules designed to be expanded with option modules. Port options on the S-Series
modules are 10/100/1000BASE-TX RJ45 ports, 1000BASE-X SFP ports, and 10GBASE-X SFP+ ports.
IEEE 802.3af and 802.3at Power over Ethernet (PoE) is supported on the 10/100/1000BASE-TX RJ45
ports.
The S4 chassis, which has four slots, can accept up to two I/O modules and two fabric I/O
modules.
AC Power Supplies
Models
Two AC power supply models are available for use with the S4 chassis:
• S-AC-PS—The S-AC-PS power supply draws either 110 Vac 16A or 220 Vac 10A service,
providing 1200 or 1600 watts per power supply, depending upon the electrical infrastructure
of the site where the S4 chassis is located. Each S-AC-PS power supply requires a dedicated
100–240 Vac, 20 Amp earth-grounded circuit.
• S-AC-PS-15A—The S-AC-PS-15A power supply draws either 110 Vac 12A or 220 Vac 8A
service, providing 930 or 1600 watts per power supply, depending upon the electrical
infrastructure of the site where the S4 chassis is located. Each S-AC-PS-15A power supply
requires a dedicated 100–240 Vac, 15 Amp earth-grounded circuit.
Both the S-AC-PS and S-AC-PS-15A power supplies have one front-panel AC input power
connector. Power cords shipped with the S-AC-PS and S-AC-PS-15A are country-dependent.
Redundancy
The S4 chassis supports four AC power supplies that reside in the lower section of the chassis, in
slots labeled PS1, PS2, PS3, and PS4. The second, third, and fourth power supplies provide load
sharing and, depending on how the S4 chassis is populated, redundancy.
The S-AC-PS and S-AC-PS-15A are capable of load sharing the S4 chassis power load. If a power
supply fails, the other power supplies support the entire load of the chassis without interruption
to network traffic. Refer to “Precautions” on page 2-2 for power outlet requirements. Refer to
“Power Supply Planning” on page 3-13 for information on the methods of load sharing.
Note: Each S-AC-PS or S-AC-PS-15A power cord must be connected to an independent AC
power source to handle the input power requirements.
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