Siemens M7-400, S7-400 11.3 Function Elements

CPUs for M7-400
11-4 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
11.3 Function Elements
Introduction
In this section you will become familiar with the individual function elements of the
CPU 486-3 and CPU 488-3. You require the information here to be able to respond
to displays, start up, and operate an M7-400 automation computer and handle
further components (for example, memory cards, expansions).
In addition, you will find information on the watchdog, the BIOS setup and the
address assignments and interrupt assignments.
General View
Figure 11-1 shows the front and rear view of the CPU 486-3 and CPU 488-3
without covering flap. The positions of the indicators, operator controls, and other
elements required for operation can be seen from this figure.
Front view Rear view
1 = Receptacle for memory card
2 = Status and fault LEDs
3 = Mode selector switch
4 = Submodule receptacle for
interface submodules
5 = External battery supply
6 = MPI
7 = Expansion socket
8 = Cover for memory submodule
receptacle → 2 x DRAM
9 = Dongle interface
(in preparation)
1
2
3
4
46
5
7
8
9
Figure 11-1 Front and Rear View of a CPU 486-3 and CPU 488-3 without Covering Flap