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Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Product overview
SS1-t Feedback
The STA signal can be used as feedback for the safety sub-function SS1-t.
SS1-t Timing
Fig. 5: SS1-t timing graph
Legend for SS1-t timing
Term/abbreviation
Explanation
Timer
Delay element in safety relay unit
CTRL-EN
Enable signal
t
Delay
Delay time until STO request
#STO-A/B
2-channel input for STO request
STA
Feedback, STO active
t
1
Braking ramp completed (controlled functionally), rotational speed = 0
t
2
Brake closed (if present) and output stage switched off (functionally)
t
3
t
3
>
t
2
n
Rotational speed
Tab. 4: Legend for SS1-t timing
