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Expansions and configuration
10.2 Memory expansion
10.2
Memory expansion
Memory expansion options
The motherboard is equipped with four slots for memory modules. This allows you to expand
Rack PC memory up to 4 GB, of which you can use approx. 3.2 GB for the operating system
and applications.
You will find a detailed description of possible memory expansion options in the motherboard
technical manual D2156-S21 on the supplied "Documentation and Drivers" CD.
10.3
Installing expansion cards
10.3.1
Notes on the modules
Notes on module specifications
The device is designed for use with modules to PCI specifications 2.3 or 1.0a. The
dimensions of the cards may not exceed the specified dimensions. If the height is exceeded,
you may experience contact problems, malfunctions and difficulties with the assembly. The
permissible module dimensions are specified in the dimension drawings section.
NOTICE
The performance is limited for PCI modules with 5V supply voltage. The output of the
modules may not exceed 25W in total.
Note about long PCI, PCIe modules
Before long modules can be inserted into the guide rails, they must be fitted with an extender
(this should form part of the scope of supply of long modules).
Notes on the allocation of resources
Due to the number of functions on the motherboard, there are no reserved interrupts for PCI
modules. If the new expansion module requires exclusive resources, you have to disable the
functions on the motherboard. You will find notes on the allocated resources in the
motherboard technical manual D2156-S21 on the supplied "Documentation and Drivers" CD
and in the section Detailed descriptions > System resources.
58
SIMATIC Rack PC 547B
Operating Instructions, 12/2007, A5E01127519-02
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