Technical data of CPU 31x   
7.1 General technical data 
  CPU 31xC and CPU 31x, Technical Data 
7-2  Manual, 01/2006 Edition, A5E00105475-06 
Width of CPU 
 
CPU  Width 
CPU 312  40 mm 
CPU 314  40 mm 
CPU 315-2 DP  40 mm 
CPU 315-2 PN/DP  80 mm 
CPU 317-2 DP  80 mm 
CPU 317-2 PN/DP  80 mm 
CPU 319  120 mm 
 
7.1.2  Technical specifications of the SIMATIC Micro Memory Card (MMC) 
Plug-in SIMATIC Micro Memory Card (MMC)  
The following memory modules are available: 
Table 7-1  Available SIMATIC Micro Memory Cards 
Type  Order number  Required for a firmware update via  
SIMATIC Micro Memory Card 
MMC 64k  6ES7 953-8LFxx-0AA0  –  
MMC 128k  6ES7 953-8LGxx-0AA0  –  
MMC 512k  6ES7 953-8LJxx-0AA0  –  
MMC 2M  6ES7 953-8LLxx-0AA0  Minimum requirement for CPUs without DP interface 
MMC 4M  6ES7 953-8LMxx-0AA0  Minimum requirement for CPUs without DP interface 
(except CPU 319) 
MMC 8M 
1
  6ES7 953-8LPxx-0AA0  Minimum requirements for the CPU 319 
1
 If you plug in the CPU 312C or CPU 312, you cannot use this SIMATIC Micro Memory 
Card. 
Maximum number of loadable blocks on the SIMATIC Micro Memory Card 
Number of blocks that can be stored on the SIMATIC Micro Memory Card depends on the 
capacity of the SIMATIC Micro Memory Card being used The maximum number of blocks 
that can be loaded is therefore limited by the capacity of your MMC (including blocks 
generated with the "CREATE DB" SFC)