Detailed descriptions
17.2 Bus board
SIMATIC Panel PC 877
17-24 Operating instructions, Release 07/2006, A5E00877780-01
17.2 17.2 Bus board
17.2.1 Layout and principle of operation
The bus board is designed as a link between the motherboard and the expansion modules. It
is mounted with two screws.
The bus board has two PCI expansion slots (2x long), two long shared ISA/PCI and one long
ISA slot. It can host expansion modules conforming to ISA specification (Rev. 3.1) and PCI
specification (Rev. 2.0 for 5 V and 3.3 V modules). All PCI slots are master–capable. The
expansion modules are supplied with power via the bus board to motherboard connection.
Figure 17-1 Bus board
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