Siemens S7-400 - Fitting Memory Cards in the Cpus

Installing the S7-400
2-32
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
5. Fit the cover on the upper left side of the CPU by securing it with three screws.
Note
The connectors to accept the memory cards are coded (see Figure 2-4). Do not
apply force when fitting the memory cards.
Lightly press the guide supports out to remove the memory cards
(see Figure 2-4).
Slot 1
Slot 2
Figure 2-3 Fitting Memory Cards in the CPUs
Memory card
Cutout
Slots 1 and 2
Polarity
reversal
protection
Cutout
Copper flag
Guide support
Guide support