Installing Memory Expansion Submodules - Siemens SIMATIC Rack PC 840 Manual

4.2

Installing Memory Expansion Submodules

The motherboard has 3 slots for 144 pin SDRAM memory submodules. This allows
you to expand the memory capacity of your Rack PC to a maximum of
512 Mbytes.
Either one, two or three modules can be installed.
64 Mbytes
128 Mbytes
128 Mbytes
192 Mbytes
192 Mbytes
256 Mbytes
256 Mbytes
256 Mbytes
384 Mbytes
384 Mbytes
512 Mbytes
512 Mbytes
Memory expansion
Figure 4-4 Position of the SDRAM Memory Modules
SIMATIC Rack PC 840 Manual
A5E00104826-03
Memory
SIMATIC Rack PC 840 Expansions
Modules
64 Mbytes 128 Mbytes 256 Mbytes
1 –
2 –
– 1
1 1
3 –
2 1
– 2
– –
– 1
2 –
– –
– 2
–
–
–
–
–
–
–
1
1
1
2
1
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