5.3 Installing the rail
The type-specific rail is the installation platform for an IO device based on the ET 200SP HA.
Basics
● For reasons of electromagnetic compatibility, you need to ensure that the rail is conductively
connected to functional earth during operation of the plant.
The grounding for the rail must comply with the requirements for functional earth (FE).
You can find additional information about electromagnetic compatibility in the section
"Electromagnetic compatibility (Page 138)".
– The installation location (e.g. enclosure, control cabinet) must have a protective
conductor connection compliant with standards.
– The rail can also be connected to a protective conductor. This protective conductor is not
absolutely required.
Examples of functional earth (FE):
– Ground rail separately in the control cabinet
– Mount rail on grounded and galvanized mounting plates
● You can find the article numbers in the section Accessories/spare parts (Page 171).
Lengths and drill holes
The rails are available in the following versions:
● Rail 482.6 mm
This rail has two drill holes for fixing screws.
A set of screws for grounding is provided.
● Rail 1500 mm
This rail is intended for construction with special lengths and only has holes at the ends for
fixing screws.
The set of screws for grounding must be ordered separately if needed.
You can find the article numbers in the section Accessories/spare parts (Page 171).
Tools required
● If the rail is too long:
Suitable tools for shortening the rail (e.g. hacksaw)
● Drill ∅ 6.5 mm
● Tool suitable for the selected fastening type (e.g. screwdriver)
● Wrench or socket wrench, size 10 for connecting the ground cable and possibly a tool for
connecting the functional earth
● Stripping tool and crimp tool for the grounding cable
Installation
5.3 Installing the rail
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD 61
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