The Cisco 2100 Series also manages the chassis environment (the power supply and fans as well as the blades)
in conjunction with the fabric interconnect. Therefore, separate chassis management modules are not required.
Cisco UCS 2100 Series FEXes fit into the back of the Cisco UCS 5100 Series chassis. Each Cisco UCS 5100
Series chassis can support up to two FEXes, enabling increased capacity as well as redundancy.
LEDs
There are port activity LEDs and an LED that indicates connectivity to the servers in the chassis.
Buttons
No buttons are on the FEX.
Connectors
I/O ports support SFP+ 10 Gb Ethernet connections. There is also an HDMI console connector on the front
of the FEX that is intended for use by Cisco service technicians. This connector is not intended for customer
use. Because of the ability to access the FEX controller itself, physical access to this connector should be
controlled at all times by using the HDMI press-fit plug that ships with the FEX or by taking other appropriate
physical protections.
Power Distribution Unit (PDU)
The AC PDU (N01-UAC1) provides load balancing between the installed power supplies, as well as distributing
power to the other chassis components. DC versions of the chassis use a different PDU with appropriate
connectors. The PDU is not field-serviceable, and converting an AC chassis to a DC chassis by swapping the
PDU is not supported, as the PDU is not separately orderable.
LEDs
No LEDs are on the PDU.
Buttons
No buttons are on the PDU.
Connectors
The AC version of the PDU has four power connectors rated for 15.5 A, 200-240V @ 50-60 Hz. Only use
power cords that are certified by the relevant country safety authority or that are installed by a licensed or
certified electrician in accordance with the relevant electrical codes. All connectors, plugs, receptacles, and
cables must be rated to at least the amperage of inlet connector on the PSU or be independently fused in
accordance with the relevant electrical code. See for more information about the supported power cords. See
Supported AC Power Cords and Plugs, on page 91
for more information.
Cisco UCS 5108 Server Chassis Installation Guide
30
Overview
Power Distribution Unit (PDU)
