Input delay (ms)
Input delay accuracy (ms)
200
15
500
25
Table 89: DX581-S safety module
Input delay (ms)
Input delay accuracy (ms)
1
2
2
2
5
3
10
4
15
5
30
6
50
10
100
15
200
25
500
50
Below, a few examples on how to calculate SFRT values under various AC500-S system configurations are
presented. In our calculations, we use the following approach, based on [3] and [8] , which allows us calcu-
lating SFRT as:
Equation 2: SFRT = Devi 0.5 * F_WD F_H 0.5 * F_WD Device_WD2
+ Longest ∆T_WD
Safety times
Safety function response time
30.03.2017
AC500-S
398
