Step 3. Internal Wiring - Simplex 4100-5101 Installation Instructions Manual

Step 3. Internal Wiring

Overview
The XPS gets its power from the power distribution module or PDM (4100U and 4100ES only) or
the power distribution terminal block (4100-2301 Expansion Bay only). The PDM or terminal
block take power directly from the AC mains and the two backup batteries, and distributes power to
each bay in the cabinet.
Figure 4, below, shows the PDM in the 4100U/4100ES connecting to a host FACP with two XPSs.
The instructions in this section describe how to connect the XPS to AC mains and batteries in both
regular 4100U/4100ES back boxes (2975-94xx Back Boxes) and the 4100-2301 Expansion Bay (for
2975-91xx for non-4100U/4100ES Back Boxes).
SPS
XPS
BTRY
AC
XPS
BTRY
AC
BATTERY BATTERY
Figure 4. System Power
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INCOMING
AC POWER
AC
BTRY
SPS = System Power Supply
XPS = Expansion Power Supply
PDM = Power Distribution
Module
PDM