Mayr ROBA-spot-M 891 Series, Инструкция по установке и эксплуатации

Страница: 12 / 17

Installation- and Operational Instructions
for ROBA-stop
®
-M Brakes
Type 891. _ _ _ . _ Sizes 2 – 500
(B.8.1.GB)
16/11/2005 TK/KE/RJ Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
D-87665 Mauerstetten http://www.mayr.de
Page 12 of 17 Germany eMail: info@mayr.de
11. Removal of magnetic field
A.C.-side switching
The circuit is interrupted in front
of the rectifier. The magnetic
field reduces slowly. This
means that the braking torque
rise is delayed.
If switching times are of no
object, please switch A.C.-side,
as here no protective measures
are necessary for the coil and
switching contacts.
Description:
low switching noise, however a longer brake engagement time
(c. 6-10 times longer than for D.C. side switch–off), for use with
non-critical brake times.
D.C.-side switching
The power circuit is interrupted
between the rectifier and the
coil as well as on the mains
side. The magnetic field is
reduced very swiftly, meaning a
swift rise in the braking torque.
With D.C.-side switching, high
voltage peaks are produced in
the coil, which can lead to wear
on the switching contacts
caused by the resulting sparks
and insulation destruction.
short brake engagement time (e.g. for an Emergency stop),
however; higher switching noises.
Protection wiring
For D.C.-side switching, the coil must be protected by a suitable
protection wiring according to VDE 0580. This is already integrated
in mayr
®
rectifiers. To protect the switch contact from corrosion
when switching D.C.-side, it may be necessary to install additional
protective measures (e.g. contact serial switching).
The switching contacts used must have a minimum contact gap of
3 mm, and should be suitable for inductive loads. Also, please
make sure that the product has sufficient voltage rates as well as
sufficient rated operational current. Depending on its usage, the
switching contact can also be protected by other protective wiring
(e. g. mayr
®
spark quenching units, half-wave and bridge rectifiers),
meaning, however, that the switching time may be altered.
S1
F1
L N
1 2 3 4 5 6 7 8
2/017.000.2
230..400V~
230..300V~
Imax
1,8A– R:0 -10M
T:0,05-2sec Ω Ω
IN OUT
U– = 0,45×U~
+ –
S
DC
ROBA -switch
®
) (
1 2 3 4 5 6 7 8
F1: external fuse
Coil
S1
F1
L N
1 2 3 4 5 6 7 8
2/017.000.2
230..400V~
230..300V~
Imax
1,8A– R:0 -10M
T:0,05-2sec Ω Ω
IN OUT
U– = 0,45×U~
+
–
S
DC
ROBA -switch
®
) (
1 2 3 4 5 6 7 8
F1: external fuse
Coil