Mounting Rack For S7-400H; Power Supply; Synchronization Submodules; Fiber-Optic Cables - Siemens SIMATIC S7-400H Manual

S7-400H Installation Options

Mounting rack for S7-400H

We recommend you the UR2-H mounting rack for the S7-400H. The mounting rack
makes it possible to configure two separate subsystems, each containing nine
slots, and is suitable for installation in 19" cabinets.
Alternatively, you can also configure the S7-400H on two separate mounting racks.
Two mounting racks, the UR1 and UR2, are available for this purpose.

Power supply

As a power supply, you will require for each fault-tolerant CPU – or, to be more
precise, for each of the two subsystems of the S7-400H – a power supply module
from the standard range of the S7-400.
Power supply modules for rated input voltages of 24 VDC and 120/230 VAC are
available with 10 and 20 A output current.
To enhance the availability of the power supply, you can also use two redundant
power supplies in each subsystem. In this case you should use the PS 407 10 A R
power supply module for rated voltages of 120/230 VAC with an output power of
10 A.

Synchronization submodules

The synchronization submodules are used to connect the two central processing
units. They are installed in the central processing units and interconnected by
means of fiber-optic cables.
Two synchronization submodules have to be inserted in each CPU.

Fiber-optic cables

The fiber-optic cables are inserted into the synchronization submodules and form
the physical connection (redundant link) between the two central processing units.
2-4
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07