Installation and Operational Instructions for
ROBA-stop
®
-stage Type 8070. _ _ _ _ _
Sizes 8
– 200
(E102 03 000 000 4 EN)
18/11/2022 HW/GC
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 9 of 17
Table 4: Switching Times
Size
Nominal braking torque
[Nm]
M
N
Switching times [ms]
Attraction
Drop-out AC
Drop-out DC
t
2
t
11
t
1
t
11
t
50
*
t
90
*
8
16
55
140
310
20
25
30
10
40
160
330
25
30
36
16
32
90
190
370
23
30
36
24
75
240
420
27
35
40
32
64
130
240
450
29
38
46
52
110
270
500
33
42
52
64
120
180
240
520
40
50
65
80
150
330
590
50
60
75
100
200
210
320
600
46
64
85
160
190
370
700
58
68
90
200
365
250
400
750
55
75
120
260
220
480
820
70
85
135
*
Referring to the nominal braking torque
The specified switching times are guideline values which are subject to tolerances, at nominal voltage, nominal air gap
and room temperature. They can only be achieved using the respective correct electrical wiring. This also refers to the
protection circuit for brake control and the response delay times of all control components. If the brake is operated using
overexcitation, the respective switch-on and switch-off times for overexcitation must be taken into account.
The use of varistors for spark quenching increases the DC-side switching times.
Torque-Time Diagram
Key
M
Br
= Braking torque
M
L
= Load torque / test load according to EN 17206
t
11
= Response delay on connection
t
50
= Connection time until reaching 50 %
of the nominal braking torque M
N
t
90
= Connection time until reaching 90%
of the nominal braking torque M
N
t
1
= Connection time
t
2
= Separation time
t
4
= Slip time + t
11
U
N
= Coil nominal voltage
M
Br
0.1 x M
Br
M
L
t
11
t
1
t
2
U
M
t
t
U
N
t
4
