Alcatel-Lucent 7450 ESS-1, Installation Manual

Page: 55 / 92

AC and DC Power Connections
7450 ESS-1 Page 55
DC-Input Power Supply Guidelines
If you intend to use DC-input power in the 7450 ESS-1, observe the following:
• A fully redundant system operates with two power systems. AC and DC power types are
available in the 7450 ESS-1 chassis.
→
DC/DC model — Wire both DC terminal blocks on the DC/DC model.
→
AC/DC model — Plug an AC power cord into the AC receptacle at the rear of the
chassis. Wire the single DC terminal block on the AC/DC model.
• The unit is shipped with a safety cover installed on the DC terminal blocks. The safety
covers should always be installed during normal operation.
• DC power cords are not shipped with 7450 ESS-1 routers.
DC-input power connections require copper wire cables (see Figure 13 ).
• For DC power connections, a ground connection on the chassis is required. Copper wire
must be used. Grounding cables are not provided.
Danger:
• The 7450 ESS-1 can be powered by the external UL Listed, DC 48V output power supply
optionally provided with the system, outside of a restricted area. When powering with the
external power supply optionally provided with the product, the product and power supply
connection should be left such that the DC 48V is not accessible after installation, with
wire insulation stripped to proper lengths and the safety cover secured in place (
Figure 12 ).
• 7450 ESS-1 systems equipped with DC-input power supplies should be installed in
restricted access areas, such as a dedicated equipment room or an equipment closet, in
accordance with Articles 110-16, 110-17, and 110-18 of the National Electric Code ANSI/
NFPA 70.