Life Time; Response Times - ABB FSO-21 User Manual

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Life time

FSO-21 life time
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Response times

Safety function response time
FSO-21 response time
• from an FSO input to an FSO
digital output activation
Cascade response time
• from FSO's STO activation to the
cascade output activation
• from the cascade input to the
cascade output activation
PROFIsafe
• Worst case delay time (WCDT)
• Device acknowledgement time
(DAT)
Example 1
STO request from
I/O or PROFIsafe
PROFIsafe
STO ack. (WCDT)
DO activation
Removal of
torque (Drive)
20 years
Maximum response time of the FENA, FSO and drive
combination is 100 ms.
Note: Delays that depend on parameter settings can
change the response time.
Maximum 35 ms
Maximum 35 ms
Maximum 35 ms
If the STO is cascaded, safety function response time
for the cascaded units is (n-1) x 35 ms + 100 ms, where
n is the number of cascaded FSO modules.
54 ms (FSO and FENA combination)
54 ms
54 ms
35 ms
0 ms 35 54
100 ms
100 ms
Technical data 437
Time