5.7.3 Reaction times
The reaction time to an interrupted light array (ESPE) or a pressure-sensitive edge can be
determined by measuring the motor current reduction. To this end, the ESPE or pressure-
sensitive edge system can be activated (interrupted or triggered) during constant travel so that
the drive reverses.
The reaction times are independent of the sensor type (ESPE or pressure-sensitive edge). The
minimal response time amounts to 70 ms and the maximum response time amounts to 90 ms.
The delay caused by additional switchgear in the signal chain and by the sensor technology itself
must be added.
5.7.4 Stopping distances
The following table shows the expected stopping distances depending on the dierent
declaration ramps and dierent initial speeds, under consideration of a response time of 90 ms
(ESPE and / or pressure-sensitive edge, see section Reaction times (Page 171)).
Table 5-27 Expected stopping distances [mm] under consideration of the ESPE execution time (90 ms)
Initial speed
[mm/s]
Set deceleration ramp [mm/s
2
]
1400 1200 1000 800 600 400
300 59 65 72 83 102 140
350 75 83 93 108 134 185
400 93 103 116 136 169 236
450 113 125 142 167 209 294
500 134 149 170 201 253 358
550 158 176 201 239 302 428
600 183 204 234 279 354 504
650 209 235 270 323 411 587
700 238 267 308 369 471 676
750 268 302 349 419 536 771
Controllers
5.7 Sensors and external sensor interface module
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA 171
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