IPE architecture 2-11
Meridian SuperNode MSL-100 Intelligent Peripheral Equipment (IPE) Reference Manual MSL14
Pedestal base
Each column rests on a pedestal base (NT7D09) made of die-cast construction.
The pedestal base (hereafter called “pedestal" in this guide) consists of a
blower unit (with two blowers) and a -48 V dc Power Distribution Unit (PDU).
The pedestal is equipped with the Extended System Monitor (XSM) to
monitor IPEC status and generate frame alarms. These items are described in
this chapter.
The IPEC pedestal assembly provides the physical support and logical frame
position for the stackable IPE modules and top cap. Besides the items listed in
the above paragraph, the pedestal houses the leveling feet, grill, -48 V dc PDU
assembly, and other items such as the product label, air filter, PDU harness,
panels, gaskets, and a Terminal Block (TB). The pedestal should be equipped
with leveling feet to provide stability
Blower unit (NT8D52)
The blower unit (NT8D52) in the pedestal provides forced air cooling with two
2-speed fans. The fans normally operate at low speed; however, if a condition
of thermal stress occurs, the fans are automatically switched to high speed.
Both fans operate under normal conditions. If one of the two fans fails or the
temperature reaches 149
°
F (65
°
C), an XSM fault report notifies the CC.
The IPE uses the following possible fan unit status and fault reports for the
blower unit:
•
Fan unit is operational
•
Fan unit is not operational, and temperature alarm has been triggered
•
Temperature is OK
•
Unit has reached an excessively high temperature
Power Distribution Unit (NT7D67)
The Power Distribution Unit (PDU, NT7D67) receives dc power (-48 V dc
nominal) from a battery source external to the IPEC and distributes the power
to the IPE modules and to the blower unit in the pedestal through the circuit
breakers.
Expansion kit (NT8D49)
The expansion kit (NT8D49) shown in the figure that follows bolts modules
from separate IPECs together for side-by-side expansion. The kit includes an
expansion spacer, Radio Frequency Interference (RFI) gasketing, and eight
bushings. There is one kit for each module after the first column.
Installations on concrete floors require Expansion Kit NT8D49, and
installations on raised computer floors in earthquake risk areas require
Expansion Kit NT8D49BA.
