Siemens SIMATIC PCS 7 - Page 51

Hardware components
Communication processors Communication processor CP 443-5 Extended
Communication processor CP 443-1
Setup
5DFNV6SDWLDOO\VHSDUDWHGVXEV\VWHPEDVLF
V\VWHP6+
ILEHURSWLFFDEOHV
6\QFKURQL]DWLRQFDEOHV
V\QFPRGXOHV&3836
Racks
The following racks are available for installing the S7-400H. Normally, the UR2-H rack is used.
Type Slots Special feature
Rack UR2‑H 2 x 9 Installation of two separate subsystems each with nine
modules. The two subsystems are electrically isolated
(not mechanically).
It is not possible to replace a rack in runtime.
Rack UR2 1x 9 Two racks are required for an S7-400H .
You can replace a rack in runtime.
Rack UR1 1x 18 Two racks are required for an S7-400H .
You can replace a rack in runtime.
Rack CR3 1x 4 Two racks are required for an S7-400H .
You can replace a rack in runtime.
Central processing units
There are two CPUs in an H-system. The two CPUs are connected to one another using
synchronization modules and fiber-optic cables.
Power supply
A separate power supply module from the standard S7-400 series is needed for each
subsystem of the S7-400H. Two power supply modules can be used in each subsystem to
increase the availability of the high availability system. In this case, use the following power
supply modules that can be used for redundancy.
Power supply modules for 24 VDC as well as for 120/230 VAC nominal input voltages with
output currents of 10 and 20 A.
High availability solutions in PCS 7
4.2 Solutions for automation systems
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA 51