2-36
Chapter 2 Installing FACP Components
Step 7. Interconnecting Modules and Bays (continued)
EPS CPU Bay
Interconnections
For the New Configuration:
• The FACP power supply and the CPU master motherboard are connected through the PDI
board.
• Connect the power supply’s “RUI+ Earth Detect” (P9 on the EPS card) to the Earth Fault
(P1) on the RUI+ CPU Motherboard card.
• To connect the RUI+ CPU Motherboard to adjacent cards that do not communicate
through the PDI (2” motherboards for example), insert a male-male 10 pin header into the
Motherboards’s female ten pin header (J8) and insert the other end into the adjacent card.
EPS CPU
Interconnections
in Expansion
Bays
Expansion bays comprise all bays other than the CPU bay. If you are installing a two- or
three-bay FACP, you will be using expansion bays (refer to Figure 2-38).
The power distribution interface (PDI) is mounted to the back of each expansion cabinet. The
PDI contains slots for up to eight 4” X 5” slave cards. Since the PDI carries power and data
across the entire bay, it solves most interconnection issues, especially between 4” X 5” cards.
Refer to “Step 5: Installing Modules into Expansion Bays ” for instructions on mounting 4” X
5” cards to the PDI. Also bear in mind the following variations:
• In a remote expansion cabinet, a transponder interface card (TIC) requires additional
interconnections. This occurs in MINIPLEX systems. Refer to Chapter3.
• Regular motherboards require non-PDI interconnections to each other and to the CPU.
Refer to “Step 5: Installing Modules into Expansion Bays.”
EPS CPU Basic
Bay-To-Bay
Interconnections
Panels with two or three bays must be interconnected properly so that they function together as
the central point of a standalone or MINIPLEX system, or as a node on a network.
• The CPU bay can be connected to a local expansion bay by connecting the P2 or P3
connector on the left end of the CPU PDI card to the expansion bay’s PDI P1 connector.
Figure 2-37 shows a typical interconnect using P2 on the CPU PDI to P1 of the first
expansion bay.
• To connect two adjacent expansion bays, route the 734-008 Harness from P2 or P3 on the
first PDI to P1 on the PDI in the next bay. Jumpers P4 and P5 are set to positions 2 and 3
(right) to provide card power to the bay from a power supply (EPS, SPS, XPS, or RPS)
located in the same bay. Jumpers P4 and P5 are set to positions 1 and 2 (left) to provide
card power to the bay from P1 on the PDI.
Note: Interconnections can become more involved if regular motherboards are used. Refer to “Installing
Modules into Expansion Bays” if this is the case.
Continued on the next page
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