Detailed descriptions
16.2 Bus board
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
145
16.2
Bus board
16.2.1
Bus board - Layout and principle of operation
The bus board is designed as a link between the motherboard and the expansion modules. It
is mounted by means of four screws.
This bus board is available in two versions:
Variant 1: Low end (8 slots)
7 PCI slots, 3 of upstream of the PCI2PCI bridge,
4 downstream
Blue line
Upstream of the PCI bridge
(Primary PCI bus)
Red line
Downstream of the PCI bridge
(Secondary PCI bus)
1 x PEG slot
Variant 2: High end (11 slots)
7 PCI slots, 3 of upstream of the PCI2PCI bridge,
4 downstream
Blue line
Upstream of the PCI bridge
(Primary PCI bus)
Red line
Downstream of the PCI bridge
(Secondary PCI bus)
1 x PEG slot
3 x PCIe-X4 slots