Specifications

Page 9–2
FOCUS System Manual
ably with braided conductors. The power
supply connection is not polarity sensitive for
any voltage rating.
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 interface (see Figure 9-1). 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 stud (or screw) directly to
an electrical ground, using stranded wire,
braided wire is preferred. The power supply
connection is not polarity sensitive for any
voltage rating.
Figure 9–1. FOCUS Power Supply Interfaces
Screw or Compression Type.
(Replacement procedure located in Appendix A)
2. Insert the Power Supply Module(s) into the
chassis.
If you have a single Power Supply Module,
carefully insert it into the top and bottom
grooves of the slot on the front of the FOCUS
chassis labeled PWR-MAIN. Slide it all the
way in until it is well seated in the slot. Lock
it into place using the black inject/eject lever
on the front of the module.
If you have both main and standby Power
Supply Modules, carefully insert the one you
are using as the main, or primary, power
supply into the top and bottom grooves of the
slot on the front of the FOCUS chassis labeled
PWR-MAIN. Slide it all the way in until it is
well seated in the slot. Lock it into place using
the black inject/eject lever on the front of the
module.
Then, in the same manner, insert the power
supply you are using as the standby, or
backup, into the slot labeled PWR-STBY.
3. Energize the chassis.
Energize the FOCUS chassis by turning on
the power source(s). If the Power Supply
Module is functional, the red/green status
LED is lit. If the Power Supply Module is the
only common equipment installed, the status
The maximum power consumption by each
FOCUS Power Supply Module is 50 watts. It is
therefor important that you rate your fuses or
breaker accordingly.
NOTE
Before applying power to the chassis, you
must connect the ground screw on the
interface to an electrical ground via a
dedicated stranded wire. Braided wire is
preferred.
NOTE