Siemens S5-135U/155U - Manual (Page 224)

5-84
System Manual
C79000-G8576-C199-06
5.10 377 Memory Submodules
This section provides a summary
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of the use of the 377 memory submodules in the 928B (up to -3UB12),
928 (up to -3UA12) and 922 CPUs,
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and of the technical specifications.
Note
You cannot use the memory submodule 377 for the CPU 928B from version
3UB21, nor for the CPU 928 from version 3UA21.
5.10.1 Technical Description
377 memory submodules (RAM submodules) are available with or without
battery backup in the following capacities:
Without Battery Backup With Battery Backup
16 Kbytes 64 Kbytes
32 Kbytes
64 Kbytes
The order numbers for the 377 memory submodules can be found in the
ordering information.
5.10.2 Notes on Operation
377 memory submodules are loaded online (from the PG) in the CPU. A
description of loading the individual submodules or the entire program can
be found in the STEP 5 manual. Loading RAM
Submodules
CPUs, Memory Cards, Memory Submodules, Interface Submodules