12
Functional safety
Connections variants
Operating Instructions – MOVIMOT
®
advanced
291
12.4 Connections variants
12.4.1 General information
Generally, all the connection variants listed in this documentation are permitted for
safety-relevant applications as long as the basic safety concept is met. This means
you have to make sure that the DC 24 V safety inputs are operated by an external
safety relay or a safety controller, in this way preventing an automatic restart.
All the safety conditions stipulated in the chapters "Integrated safety technology",
"Safety conditions", and "Connection variants" must be satisfied on a primary basis for
the basic selection, installation, and application of the safety components such as
safety relay, emergency stop switch, and the approved connection variants.
The wiring diagrams are block diagrams whose only purpose is to show the drive
safety function(s) with the relevant components. For reasons of clarity, circuit-related
measures that usually always have to be implemented are not shown in the diagram.
These measures are e.g.:
• Ensuring the availability of touch guards.
• Handling overvoltages and undervoltages.
• Avoiding installation errors.
• Detecting ground faults or short circuits in externally installed lines.
• Guaranteeing the required interference immunity against electromagnetic interfer-
ence.
12.4.2 Requirements
Using safety relays
The requirements of the manufacturers of safety relays (such as protecting the output
contacts against welding) or of other safety components must be strictly observed. For
cable routing, the basic requirements apply as described in this documentation.
For connecting the drive unit with the safety relays, observe the installation require-
ments in chapter "Functional safety" > "Safety conditions" > "Installation require-
ments".
All instructions by the manufacturer of the safety relay used in the particular applica-
tion must be observed.
25891936/EN – 05/2020
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