However, if there is a power demand of over 45 unit loads
on one Power Supply Module, an Auxiliay Power Unit is
generally required. This will support an additional 20 unit
loads.
If one or more of the following conditions exist, the
system may need an Auxiliary Power Unit:
●
●
●
●
The maximum number of voice terminals are
connected to the system.
Several voice terminals have accessories and the voice
terminals do not have Voice Terminal Power Supply
Units.
There are long wiring runs between the control unit
and the voice terminals.
The lights on some of the voice terminals become dim
or go out altogether when many employees use their
voice terminals simultaneously.
NOTE:
Only one Auxiliary Power Unit can be connected
to a carrier.
To determine the number of unit loads for each Power
Supply Module on each carrier, determine the types of
modules and types of voice terminals connected to them.
Then see Table 2-8 on page 2-59 for the unit load
requirements of each voice terminal and accessory. Add
the number of unit loads together. If the total on any
carrier exceeds 45, install an Auxiliary Power Unit.
See the equipment supplier for a complete list of power
accessories.
Adding Accessories 2-123
Summary of Contents for administration and
Page 40: ...FIGURE 1 9 System architecture Theory of Operation 1 37 ...
Page 175: ...Top cover Front cover FIGURE 2 27 Control unit covers Testing the System 2 107 ...
Page 211: ...FIGURE 3 I A MERLIN II System Display Console The Administrator Attendant Console 3 3 ...
Page 213: ... FIGURE 3 2 A BIS 34D Console The Administrator Attendant Console 3 5 ...
Page 331: ...General Tests 4 55 Reaming the Control Unit 4 55 Testing Outside Lines 4 56 ...