10
Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Product overview
STO timing
Fig. 3: STO timing graph (example with low test pulses)
Legend for STO timing
Term/abbreviation
Explanation
#STO-A/#STO-B
2-channel input for STO request
#STO-PWM1/#STO-
PWM2
Internal control, PWM driver 1 and 2
t
STO,TP
Length, low test pulses
1)
at #STO-A/B
t
STO,In
Max. delay until STO switches off (≤ permissible reaction time when a safety
sub-function is requested
1)
)
STA
Feedback, STO active
t
STA,Rise
Maximum permissible delay
1)
for diagnostic feedback after the safety func-
tion is requested
