The S7-400H Base System; Figure 3-2 Hardware Of The S7-400H Base System - Siemens SIMATIC S7-400H System Manual

S7-400H installation options

3.3 The S7-400H base system

3.3 The S7-400H base system
Hardware of the base system
The base system consists of the hardware components required for a fault-tolerant control.
The following figure shows the components in the configuration.
The base system may be expanded with the standard modules of an S7-400. Restrictions
only apply to the function and communications modules; see Appendix Function modules
and communication processors supported by the S7-400H (Page 333).
Figure 3-2
Central modules
The two central modules are the heart of the S7-400H. Use the switch on the rear of the
CPU to set the rack numbers. In the following sections, we will refer to the CPU in rack 0 as
CPU 0, and to the CPU in rack 1 as CPU 1.
Rack for S7-400H
The UR2-H rack supports the installation of two separate subsystems with nine slots each,
and is suitable for installation in 19" cabinets.
You can also set up the S7-400H in two separate racks. Racks UR1 and UR2 are available
for this purpose.
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Hardware of the S7-400H base system
System Manual, 09/2007, A5E00267695-03
S7-400H