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Installing the Control Unit
Step 4b: Replacing an Auxiliary Power Unit
See Figure 2-15 throughout this procedure.
a.
b.
c.
d.
e.
f.
9.
Make sure that the switch on the power supply is turned off.
Unplug both the power supply and the auxiliary unit from the outlet.
Disconnect the cord from the jack labeled
AUX POWER INPUT
on the
power supply.
Remove the auxiliary power unit (with the two cords still attached).
Mount the replacement auxiliary power unit in place of the old one.
Connect the cord into the jack labeled
J2 DC OUTPUT
on the
replacement auxiliary power unit.
Connect the other end into the jack labeled
AUX POWER INPUT
on the
power supply.
CAUTION:
■ Do not plug the power supply or the auxiliary power
unit into the AC outlet until you are ready to turn on the
system, as described later in this chapter under
“Powering Up the System.”
■ Do not attach the power cord(s) to any building
surfaces.
Installing the Processor
2-51