Festo CMMT-AS-C2-11A-P3, Manual, Page: 33 / 44

Safety reference data of the SBC safety function
Wiring Two brakes
1)
With SBA evalu-
ation
2)
One brake
3)
Without SBA evalu-
ation
Safety function in
accordance with
EN 61800-5-2 Safe brake control (SBC)
Safety integrity level in
accordance with
EN 61508 SIL 3 SIL 1
SIL pick-up threshold
for a partial system in
accordance with
EN 62061 SIL CL 3 SIL CL 1
Category in accordance
with EN ISO 13849-1 Cat. 3 Cat. 1
Performance level in
accordance with
EN ISO 13849-1 PL e PL c
Probability of danger-
ous failure per hour in
accordance with
EN 61508, PFH [1/h] 3.00 x 10
–10
9.00 x 10
–8
Mean time to danger-
ous failure in accord-
ance with
EN ISO 13849-1,
MTTF
d
[a] 1400 950
Average diagnostic
coverage in accordance
with EN ISO 13849-1,
DC
AVG
[%] 93 –
Operating life in
accordance with
EN ISO 13849-1, T
M
[a] 20
Safe failure fraction SFF
in accordance with
EN 61508 [%] 99 87
Technical data
33 Festo — CMMT-AS-...-S1 — 2018-02