Siemens SIMATIC S7-400H - Design of the Memory Card; Expanding Load Memory with Memory Cards; Function of the Memory Card; Order Numbers

Installation of a CPU 41x-H
4-17
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
4.5.1 Expanding Load Memory with Memory Cards
Order Numbers
The order numbers for memory cards are listed at the end of this chapter with the
technical specifications.
Installation
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.
Grip
Side elevation
Type plate
Front elevation
Name of the memory Card Order number
Figure 4-3 Design of the memory card
Function of the Memory Card
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.