Design And Function Of Memory Cards; Structure Of The Memory Card - Siemens SIMATIC S7-400 Reference Manual

Structure of a CPU 41x
1.5

Design and Function of Memory Cards

Order Numbers
The order numbers for memory cards are listed in the technical specifications in
Chapter 4.
Configuration
The memory card is slightly larger than a credit card and protected by a strong
metal casing. It is plugged into a receptacle at the front of the CPU; the end to be
inserted is obvious from the design of the memory card.
Front elevation
Figure 1-6
Function
The memory card and an integrated memory area on the CPU together form the
load memory of the CPU. In operation, the load memory contains the complete
user program including comments, symbols, special additional information that
permits decompiling of the user program, and all the module parameters (see
Chapter 2.1).
1-18
Side elevation
Type plate
Grip

Structure of the Memory Card

Automation System S7-400 CPU Specifications
A5E00165965-01