ABB FPTC-01, Руководство пользователя

Страница: 82 / 108

Technical data 81
Safety data
The FPTC-01 module is a type A safety component as defined in
IEC 61508-2.
The table gives the safety data for the SMT function with different
configurations. The calculations are based on the worst case data
of the drive Safe torque off (STO) function. The PFH/PFD
avg
values can be different based on the internal configuration of the
FSO module.
Note : The failure rate of the PTC sensor is not included in the
calculations.
Two-channel configurations
1. FPTC drive STO (see Wiring example 1 on page 45 )
2. FPTC drive STO + FSO module with STO function
request (see Wiring example 2 on page 46 ), or
3. FPTC drive STO + external safety relay (see Wiring
example 3 on page 47 ).
One-channel configurations
4. FPTC drive STO (see Wiring example 4 on page 48 )
5. FPTC drive STO + FSO module with STO function
request (see Wiring example 5 on page 49 ).