Input
devices
Input
PLC
Logic
Output
PROFIsafe FSPS-21
Drive
STO
The FSPS-21 acts as the logic part in the safety function. The safety data for
the safety function where FSPS-21 and drive are used is composed of the
safety data of the subsystems. Safety data for different subsystems is shown
in section Basic safety data (page 197).
FSPS-21 subsystem
PROFIsafe is a subsystem for the reliability of PROFIsafe connection. FSPS-
21 module takes care of the reliability and safety of this connection.
PROFIsafe
Drive STO is the actuator for the STO of the drive.Drive STO
For the safety data, see the drive HW manual.Input devices, PLCs, and oth-
er subsystems
After calculating the total PFDavg/PFH for the safety function, it must be verified that the
PFDavg/PFH of the safety function fulfills the requirement for the targeted SIL/PL. For
additional information on safety calculations, see standards EN ISO 13849-1, EN/IEC 62061,
IEC 61508, IEC 61511, or ABB Drives Technical guide No. 10, Functional safety
(3AUA0000048753 [English]).
￭ Basic safety data
The FSPS-21 module is a type B safety component as defined in IEC 61508-2.
The FSPS-21 data related to safety standards IEC 61508, EN/IEC 61800-5-2, EN ISO
13849-1, IEC 61511 and EN/IEC 62061 is listed below for the subsystem of the FSPS-21
module.
Maximum useful mission time (T
m
) for the FSPS-21 is 20 years. After 20 years, the module
has to be replaced.
The given safety data applies with proof test interval T1 = 20 years (high demand and
continuous mode of operation) and T1 = 2 years or T1 = 5 years (low demand mode of
operation). Make sure that the proof test is performed within this time (see also section Proof
tests (page 190)).
This safety data applies to both safety functions, STO and SS1-t.
EN/IEC 62061EN ISO 13849-1EN 61508
3SILCLup to ePLup to 3SIL
3Cat.3SC
3AXD10000702254 rev B
FSPS-21 (4000 m above
sea level
1)
)
FSPS-21 (at sea level,
0 m
1)
)
PROFIsafe
333SIL/SILCL
eeePL
5,17E-081,08E-081,00E-09PFH (1/h)
(T1 = 20 a)
Technical data 197
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