Cable Length Up To 500M; Technical Specifications - Siemens SIMATIC S7-400H Manual

Changing the Operating Mode of an H CPU
To change the operating mode of an H CPU, carry out one of following procedures
depending on the operating mode you wish to change to and the module rack
number of the CPU:
Changing from redundant to single mode
1. Remove the interface module.
2. Perform a power on without backup e.g., by removing and inserting the CPU.
3. Load a project into the CPU in which it is configured for single mode.
Changing from Single to Redundant Mode, Module Rack Number 0
1. Connect the synchronization modules set for rack number 0.
2. Perform a power on without backup e.g., by removing and inserting the CPU.
3. Load a project into the CPU in which it is configured for redundant mode.
Changing from single to redundant mode, module rack number 1
1. Connect the synchronization modules set for rack number 1.
2. Perform a power on without backup e.g., by removing and inserting the CPU.
3. Load a project into the CPU in which it is configured for redundant mode.

Cable length up to 500m

You can use the synchronization module in 2 pairs with fiber optic cables of up to
500m as of product release 2 .
S7-400 with CPU 417-4H
rack 0
Prefabricated
cable
The following points are important:
• You can use the synchronization modules with product release 1 and 2 together
and this will make a cable length of up to 10m possible.
• Make sure there is enough strain relief on the modules if you use fiber optic
cables longer than 10m.
• Adhere to the specified ambient conditions for using fiber optic cables (bending
radius, pressure, temperature...)
• Note the technical specifications of the fiber optic cable (attenuation,
bandwidth...)
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
max. 500m
SC/ST
Splicebox
Synchronization Module
S7-400 with CPU 417-4H
rack 1
Prefabricated
SC/ST
cable
Splicebox
12-5