4x3 PCI Backplane Configuration

4x3 PCI Backplane

4x3 PCI Backplane (ERS/FT II System Only)

Used only with the passive PCI bus extender card, the 4x3 backplane provides four groups of three slots each. Cubix offers two versions of the 4x3 backplane which are functionally the same but, provide different physical placement of the (slot) connectors. Figures 1 and 2 illustrate the differences.

Each slot group supports one BC 5xxxSE, SP, TE or TS plug-in motherboard with PCI extender card and up to two PCI adapters or, one ISA adapter or, a combination of one ISA and one PCI adapter on the same bus. Neither 4x3 backplane is field configurable.

Note that these two versions do not use the same sheet metal so, if a replacement is required be sure to specify the correct assembly number. The assembly number is printed on the front of the circuit board as shown in Figures 2 and 3.

In Addition ...

A BC 5xxxSP will intrude on the adjacent ISA or PCI slot depending on the height of the BC's SIMM modules. An intrusion of up to 2-inches is possible.

For the A04970 model only: A BC 5xxxSP in group 4 cannot accept a SIMM module greater that 1.25-inches. SIMM modules higher than this touch the metal chassis.

If a bus segment requires ISA only (no PCI interface), the BC plug-in motherboard can be installed without the PCI extender card.

4x3pci-1.gif (4233 bytes)

Note 1 - Only one adapter may be installed here; either PCI or ISA. The slot cannot support both PCI and ISA simultaneously.

Figure 1
4x3 PCI (Assembly 400-A04970)

4x3pci-2.gif (6721 bytes)

* Only one adapter may be installed here; either PCI or ISA. The slot cannot support both PCI and ISA simultaneously.

Figure 2
4x3 PCI (Assembly 400-A05140)