System overview
4.2 Configuration
Automation system
48 System Manual, 01/2023, A5E03461182-AK
Use in safety mode only
You can only use the S7-1500/ET 200MP fail-safe I/O modules in safety mode. They cannot be
used in non-fail-safe mode, i.e. standard mode.
Achievable safety classes
Fail-safe I/O modules are equipped with integrated safety functions for safety mode.
You can achieve the safety classes of the table below:
• By corresponding parameter assignment of the safety functions in STEP 7
• With a specific combination of fail-safe and non-fail-safe I/O modules as well as
• With a special arrangement and wiring of the sensors and actuators
Table 4- 1 Safety classes that can be achieved with S7-1500/ET 200MP in safety mode
Safety class in safety mode
According to IEC 61508:2010
According to ISO 13849-1:2015
Additional information
An overview of the technical specifications of the fail-safe I/O modules can be found in
section Fail-safe digital modules (Page 75).
The applications and wiring for the particular safety class are described in the manuals of the
fail-safe I/O modules.
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