Safety Block Diagrams; Two-Channel Configurations - ABB FPTC-02 User Manual

84 Technical data

Safety block diagrams

The components that are included in the safety data calculations are
shown in the safety block diagrams below.
Note: The failure rate of the PTC sensor is not included in the
calculations.
￭

Two-channel configurations

This diagram is applicable to configuration 1.
1 PTC sensor
2 FPTC module
3 Drive STO
This diagram is applicable to configuration 2.
1
1 PTC sensor
2 FPTC module
3 FSO module
4 Drive STO
1
2
2
3
3
4