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

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 2 3
PTC sensor1
FPTC module2
Drive STO3
This diagram is applicable to configuration 2.
1 2 3 4
PTC sensor1
FPTC module2
FSO module3
Drive STO4
84 Technical data