Technical data

5-30
Site Preparation and Installation
5
4. Plug the power cords into appropriate electrical outlets (if
any of the equipment is rack-mounted, the rack may be
equipped with power distribution modules).
Power Cables (DC Chassis)
!
Caution
Connect the equipment to a -48 Vdc supply source that
is electrically isolated from the DC source. The -48 Vdc
source is to be reliably connected to earth.
1. Remove the power to the -48Vdc wires to be connected to the
system.
2. To connect the system the DC power source, guide the free
end of a DC power wire, with about one-quarter inch of
insulation stripped from the wires, to the terminal block
labeled
-48VDC INPUT on the back of the chassis corner. Clamp
the leads to the terminal block (see Figure 5-10). The
following describes the standard color convention used for
the wiring. Your site may differ:
– Brown to
+48V
– Blue to -48V
– Green/yellow to the ground connection
3. For dual 9-slot systems, or 12- and 20-slot systems with dual
power supplies, repeat steps 1 and 2 for the second power
supply.
!
Caution
For each system, the connection to DC power consists of
three #10 AWG wire leads. To avoid grounds or shorts,
exercise care when securing these wires to the terminal
block(s) of the system.