Technical data

Hardware Information
6-28
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
Port to bus module (X1)
The computing unit has a bus module with a PCI expansion slot and a shared
ISA/PCI slot. Expansion boards can be installed complying with ISA specification
(Rev. 3.1) and PCI specification (Rev. 2.0) with a maximum length of 265 mm
(175 mm for shared ISA/PCI modules). All PCI slots can be used as masters. Only
5 V PCI modules can be operated.
The bus module is designed as a truly passive module – in other words, there are
only receptacles for the expansion boards and any backup capacitors that may be
present. The power supply of the expansion boards runs via the connection of the
bus module to the basic board. The -5 V voltage is not provided by the power
supply and is generated from the -12 V on the bus module using in-phase control.
The connection to the basic board is established by a gold-plated ’EISA’ type
two-part connector. All the necessary bus signals (ISA and PCI) are applied to this
connector. The following table shows the connector pin assignment.