Assembly of a CPU 41x–H
5.1 Operator controls and display elements of the CPUs
S7-400H
System Manual, 03/2012, A5E00267695-11
49
Memory card slot
You can insert a memory card into this slot.
There are two types of memory card:
● RAM cards
You can expand the CPU load memory with a RAM card.
● FLASH cards
A FLASH card can be used for fail-safe backup of the user program and data without a
backup battery. You can program the FLASH card either on the programming device or in
the CPU. The FLASH card also expands the load memory of the CPU.
For detailed information on memory cards, refer to section Design and function of the
memory
cards (Page 65).
Slot for synchronization modules
You can insert one synchronization module into this slot. See chapter Synchronization
modules (Page 341).
MPI/DP interface
You can, for example, connect the following devices to the MPI of the CPU:
● Programming devices
● Operator control and monitoring devices
● For further S7-400 or S7-300 controllers, see section Multi Point Interface MPI/DP (X1)
(Page 70).
Use bus connectors
with angled cable
outlet, see the
S7–400 Automation System,
Installation
manual.
The MPI can also be configured for operation as DP master and therefore as a PROFIBUS
DP interface with up to 32 DP slaves.
PROFIBUS DP interface
The PROFIBUS DP interface supports the connection of distributed I/O, programming
devices and OPs.
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