Installation guide

Installing and Removing Summit X450a Series DC-Powered Switches
Summit Family Switches Hardware Installation Guide
75
NOTE
For centralized DC power connection, these products are intended to be installed in Restricted Access Locations
(Dedicated Equipment Rooms, Equipment Closets, or the like) in accordance with Articles 110-16, 110-17, and
110-18 of the National Electric Code, ANSI/NFPA 70.
NOTE
An optional redundant power supply, the EPS-150DC, is available for use with the Summit X450a-24tDC switch,
Summit X450a-24xDC switch, and Summit X450a-48tDC switch. When one of these Summit switches is used with
the EPS-150DC, the power supplies (internal and redundant) are fully fault tolerant and load-sharing. If one power
supply fails, the other power supply will provide sufficient power to operate the switch. Refer to “EPS-150DC
External Power Module (with EPS-T2)” on page 48 for further details.
Connecting the Internal DC Power Supply to the DC Source
Voltage
Before you connect the switch to a power source, complete the physical installation of the switch in the
equipment rack, as described in “Rack-Mounting a Summit Switch” on page 73.
If you are installing a Summit X450a-48tDC switch, you must ground the chassis before connecting the
switch to the DC source voltage (see “Grounding the Summit X450a-48tDC Switch” below). If you are
not installing a Summit X450a-48tDC switch, go to “Connecting the DC Wiring Harness to the DC
Source Voltage” on page 76.
Grounding the Summit X450a-48tDC Switch
Before you connect the power input cable to the Summit X450a-48tDC switch, you must ground the
chassis, following the instructions in this section.
Gather the following materials to ground the Summit X450a-48tDC switch:
● Phillips screw with captive lock washer (provided)
● 14 AWG stranded copper wire cable with vinyl-insulated ring terminals attached at each end
(provided)
● Phillips screwdriver appropriate to the provided screw
● Additional hardware appropriate to the earth ground connection at your site
WARNING!
Be sure to connect the chassis ground wire before you connect any power cables.