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Installation and Operational Instructions for ROBA
Type 894.5_ _._ _ Sizes 9 and 10
Table 3: Switching Times [ms]
Size
Design
Attraction t
2
Drop-out t
(DC) from holding voltage
0
Drop-out t
(DC) from overexcitation
0
2)
Drop-out t
(DC)
from holding voltage
50
2)
Drop-out t
(DC)
from overexcitation
50
2)
Drop-out t
(DC)
from holding voltage
90
2)
Drop-out t
(DC)
from overexcitation
90
Drop-out t
(AC)
11
3)
Drop-out t
(AC)
1
2)
Referring to the nominal braking force
3)
Referring to the effective braking force
The stated switching times 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.
The use of varistors for spark quenching increases the DC-side switching times.
Diagram 2: Torque-Time Diagram
M
M
Br
M
L
t
11
t
1
t
4
U
U
O
U
H
27/08/2020 TK/TL/GC/SU
Page 10 of 17
9
Min. nominal
braking force
500
155
175
210
230
290
310
on request
on request
Key
M
M
t
0.1 x M
t
Br
t
t
t
t
t
2
U
U
t
U
O
t
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
www.mayr.com, E-Mail:
public.mayr@mayr.de
®
-diskstop
9
10
Max. nominal
Min. nominal
braking force
braking force
500
650
40
210
60
260
70
320
90
340
210
720
230
750
450
on request
900
on request
=
Braking torque
Br
=
Load torque
L
=
Connection time
1
=
Response delay on connection
11
(≙t
acc. Type Examination Certificate)
0
=
Separation time
2
=
Slip time + t
4
11
=
Overexcitation time
O
=
Coil nominal voltage
N
=
Holding voltage
H
=
Overexcitation voltage
O
The switching times are dependent on
the respective spring pressure.
®
(B.8.4.5.EN)
10
Max. nominal
braking force
650
55
60
100
110
360
380
600
1000
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