Safety Block Diagrams - ABB FPTC-01 User Manual

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 applies to configuration 1.
PTC
sensor
This diagram applies to configuration 2.
PTC
sensor
This diagram applies to configuration 3.
PTC
sensor
Note: The failure rate of the external safety relay is not included in the
calculation.
FPTC
module
FPTC
module
FPTC
module
Technical data 83
Drive
STO
FSO
module
External
safety
relay
Drive
STO
Drive
STO