1
2
3
4 5
6
ON
1
2
3
4
L1
L2
L3
M
3 ~
1 2 3 4
ROBA -multiswitch
®
1 2 3 4 5 6
IN
OUT
+
–
S
DC
L1
L2
L3
M
3 ~
1
2
3
4 5
6
ON
1
2
3
4
1 2 3 4
ROBA -multiswitch
®
1 2 3 4 5 6
IN
OUT
+
–
S
DC
Installation and Operating Instructions for
ROBA
®
-multiswitch Type 019._00.2
(B.019+002.EN)
29/03/2022 GC/TH/MA/SU
Page 4 of 6
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
www.mayr.com
, E-Mail:
Switch-ON
Switch-on always takes place AC-side. Only then is the
overexcitation activated.
Switch-OFF
If short switching times are required, please
switch DC-side and via the control input.
The AC-side should always be switched as
well, in order to activate the overexcitation.
Wiring Example
(400 VAC,
DC-side switching)
Wiring Example
(400 VAC,
AC-side switching)
Protection Circuit
When using DC-side switching, the coil must
be protected by a suitable protection circuit
according to VDE 0580, which is integrated
in
mayr
®
-rectifiers. Nevertheless, the high
voltage induced on circuit interruption
produces switching sparks, which lead to
contact consumption.
Therefore, only use the main contacts of
a contactor suitable for inductive loads
with a minimum contact opening of 3 mm
for switching the DC-side contact S
DC
.
Connecting the main contacts in series
reduces wear.
If a longer brake engagement time or a quieter switching
noise is required, please switch AC-side. For this, a bridge
must be installed between terminals 3 and 4.
Device Fuses
To protect against damage from short-circuits or earth short-
circuits, please add suitable device fuses to the mains cable.
As an alternative, a motor protection switch can be used.
This must be adjusted to the holding current of the brake; at
the same time it serves as overload protection for the brake.
Short-circuits or earth short-circuits can lead to ROBA
®
-
multiswitch failures. After fuse elements have reacted to a
malfunction, the ROBA
®
-multiswitch must be checked for
functional and operational safety (overexcitation voltage,
switch-off voltage, response delay time, holding voltage).
The same procedure is to be carried out after coil failure.
Recovery Time 100 ms
The recovery time is the amount of time the ROBA
®
-
multiswitch requires in order to reach its starting position
after switch-off. Therefore, the device may be switched on
again at the earliest after 100 ms.
During cycle operation, please take suitable measures to
ensure that the recovery time of 100 ms is kept to.
Operation on Transformers
During operation on a transformer, please ensure sufficient
rigidity on transformers (min. 3x P
N
of the brake).
A filter or external varistor must be installed.
Please ensure that the standard EN 50160 is kept to and that
this is re-checked after installation of the ROBA
®
-multiswitch.
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