User Manual
Chapter 6
GFK-2843A
Jan 2020
Connection examples for safe outputs
36
Therefore, for example, only errors between outputs, which are on the same connector,
are described. For example, in the event of correct installation, cross circuits with outputs
of other connectors cannot occur.
Important
For all examples, please also observe the measures specified in the individual tables,
which must be taken to achieve the specified SIL/SIL CL/Cat./PL and all measures ac-
cording to standards IEC 61508-2, EN 62061, EN 954-1, and EN ISO 13849-1 to achieve
the specified SIL/SIL CL/Cat./PL.
WARNING
Disregarding this warning may lead to the loss of the safety function
An external voltage may not be supplied in an output (e.g., via cross circuits). These errors
can adversely affect the operation of the module (or even destroy the module) and
therefore result in the loss of the safety function. Therefore, these errors must be
prevented. Install the connecting cables for connecting the actuators so that they are
protected against cross circuits.
Please observe the load capacity of the outputs according to the technical data in "Safe
digital outputs" on page 9.
6.2
Notes on the protective circuit for external re-
lays/contactors (freewheeling circuit)
Figure 12: Example of the freewheeling circuit for an external relay
