Specifications

December 2008 Page 3–5
Chapter 3. Installation
3
If you have both main and standby Power
Supply Modules and a single power source,
connect the wiring from the ac or dc power
source to screws 1 and 2 on the terminal block
on the rear of the chassis (see Figure 3-1). For
convenience, these positions are labeled
MAIN POWER. Also connect the power
source to the standby power supply, screws 3
and 4. Note that positions 3 and 4 are labeled
STANDBY POWER. You must also connect
the ground screw to an electrical ground. The
power supply connection is not polarity
sensitive for any voltage rating.
Figure 3–1. FOCUS Power Supply Interfaces
Screw or Compression Type.
If you have both main and standby Power
Supply Modules and a separate power source
for each, connect the wiring from the main ac
or dc power source to screws 1 and 2 on the
terminal block on the rear of the chassis (see
Figure 3-1). For convenience, these positions
are labeled MAIN POWER. Then, connect
the wiring from the backup ac or dc power
source to screws 3 and 4. Note that positions
3 and 4 are labeled STANDBY POWER. You
must also connect the ground stud (or screw)
directly to an electrical ground using a
stranded wire, braided wire is preferred. The
power supply connection is not polarity
sensitive for any voltage rating.
2. Connect the inter-node (transceiver)
cables.
If the chassis input/output interface is fiber
optic (i.e., if it has one or more Optical
Transceiver Modules), make the connection
as follows:
Pass the fiber optic cables through the two
holes at the rear of the chassis labeled “FIBER
OPTIC XCVR-1” (for the transceiver/s in the
XCVR-1 slot) and “FIBER OPTIC XCVR-2”
(for the transceiver/s in the XCVR-2 slot)
Connect the cables directly to the fiber optic
transceiver(s).
Before applying power to the chassis, you
must connect the ground screw on the
interface to an electrical ground, using a
dedicated stranded wire. Braided wire is
preferred.
NOTE