Features
X4-C Redundant Power Supplies
The Matrix X4‐C chassis supports up to three power supplies that install on the bottom of the chassis, in slots labeled PS1 through PS3. While the chassis can operate with fewer than three power supplies installed depending upon the number of installed IOMs, FMs, and CMs, additional power supplies provide redundancy and load sharing.
Each power supply (X‐AC) requires a dedicated 100‐240 Vac, 20 Amp earth‐grounded circuit. Power cords shipped with this unit are country‐dependent. Each power cord must be plugged into an independent power circuit.
Each power supply has its own cooling fans.
The power supplies are capable of load sharing (+/‐ 5%) the Matrix X4‐C chassis power load. If one power supply fails, the other power supplies support a minimally loaded chassis (1 IOM, 1 FM, and 1 CM) without interruption to network traffic. Refer to “Site Guidelines” on page 2‐1 and “Power Supply Requirements, Specifications, and Twist Lock Options” on page A‐2 for power outlet requirements.
As an option, you can purchase twist lock power cords which securely attach the rear power inlets to the power outlets. Refer to Table A‐6 on page A‐3 to select the correct receptacle type required to utilize this cord for your chassis.
Power Supply LEDs
Each power supply comes equipped with two LEDs for at‐a‐glance diagnostics that indicate individual AC and DC power supply status. Refer to “Power Supply LEDs” on page 3‐38, for more information.
Auto-Ranging Power Supplies
The Matrix X4‐C chassis power supplies automatically adjust to the input voltage and frequency, which allows for an input voltage of 100 to 240 Vac, and a frequency between 50 and 60 Hz. See the operating specifications in Appendix A, Specifications and Regulatory Compliance. No additional adjustments are necessary. For installations in North America, a 20 Amp power cord is required. See “Powering Up the Matrix X4‐C Chassis” on page 3‐37 for more details.
Power Supply Replacement
To limit network downtime, a power supply may be removed after it has been powered down without powering down the chassis. When more than one power supply is installed, this allows you to remove one power supply without interrupting network traffic.
X4-C Cooling System
The X4‐C features two (X‐FAN) removable fan trays accessible from the front of the unit. These four‐fan units are hot swappable, so they can be replaced without powering down the chassis. Each fan tray has one LED located on the front of the unit, indicating its status (normal/fault/off). Refer to “Fan Tray LED” on page 3‐39 for a full description of the fan tray LED states.
On the X4‐C, the fans push cooling air through the chassis and modules, from right to left, exhausting out the other side of the chassis.
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