Base System Of The S7-400H - Siemens SIMATIC S7-400H Manual

2.1

Base System of the S7-400H

Hardware of the Base System
By base system of the S7-400H we mean the minimum configuration of the
S7-400H. The base system consists of all the requisite hardware components that
make up the fault-tolerant control system. Figure 2-2 shows the components in the
installation.
You can upgrade the base system by means of standard modules from the
S7-400. There are restrictions in the case of the function and communication
processors (see appendix E).
Rack UR2H
2 PS 2 CPUs
Figure 2-2 Hardware of the S7-400H Base System
CPU 417-4 H central processing unit
At the heart of the S7-400H are the two central processing units CPU 417-4H.
Setting of the synchronization submodules, which have to be plugged into the
CPU, defines the rack numbers. In the following we will refer to the CPU in rack 0
as CPU 0,and to the CPU in rack 1 as CPU 1.
S7-400H Programmable Controller Fault-Tolerant Systems
A5E00068197-04
4 synchro- 2 fiber-optic cables
nization
submodules
S7-400H Installation Options
S7-400H base system
Rack 1
Rack 0
2-3