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ABB FSO-21 - Response Times

ABB FSO-21
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532 Technical data
Hardware diagnostics results, summary
Response times
FIT rate summary Total λ
sd
λ
su
λ
dd
λ
du
MTTF
D
[FIT] [FIT] [FIT] [FIT] [FIT] [a]
FSO-xx 309.2 0.0 19.7 197.6 91.9 1242.2
FSE-31 5.8 0.0 2.9 0.0 2.9 39262.1
Speed estimate 790.0 0.0 116.3 0.0 673.6 169.5
3AXD10001287182 C
Safety function response time ACS880 drives: Maximum response time of the FB
module (FPNO or FENA), FSO, FSE and drive
combination is 100 ms.
DCS880 drives: Maximum response time is 550 ms.
Note: Mute time usage increases the response time.
FSO-21 response time
from an FSO input to an FSO digital
output activation
Maximum 35 ms
Cascade response time
from FSO's STO activation to the
cascade output activation
Maximum 35 ms
from the cascade input to the
cascade output activation
Maximum 35 ms
If the STO is cascaded, safety function response
time for the cascaded units is (n-1) × 35 ms + 100
ms, where n is the number of cascaded FSO
modules.
PROFIsafe
Worst-case delay time (WCDT) 54 ms (FSO and FB module combination)
Device acknowledgement time (DAT) 54 ms

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