Mayr ROBA-multiswitch 019.00.2 Series, Installation And Operating Instructions Manual

Page: 5 / 6

0
Installation and Operating Instructions for
ROBA
®
-multiswitch Type 019._00.2
(B.019+002.EN)
29/03/2022 GC/TH/MA/SU
Page 5 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: public.mayr@mayr.com
DIP switch Overexcitation time t
O
[s]
0.15
0.45
1.00
1.50
2.15
Increased wear (enlarged air gap) as well
as coil heat lengthen the brake separation
time t
2
. Therefore, when dimensioning the
overexcitation time t
O
, please select at least
double the separation time t
2
on each brake
Type and size (catalogue values).
The overexcitation time can be adjusted via the DIP switch to
150 ms, 450 ms, 1 s, 1.5 s and 2.15 s ± 20 %. The switches
may only be switched in de-energised state and may only be
adjusted as depicted.
Calculations:
P [W] RMS coil capacity dependent on switching
frequency, overexcitation, reduction in capacity
and duty cycle
P =
P
O
x t
O
+ P
H
x t
H
T
P
N
[W] Coil nominal capacity (catalogue values, Type
tag)
P
O
[W] Coil capacity on overexcitation
P
O
=
(
U
O
)²
x P
N
U
N
P
H
[W] Coil capacity at reduced capacity
P
H
=
(
U
H
)²
x P
N
U
N
t
O
[s] Overexcitation time
t
H
[s] Time of operation with reduction in capacity
t
off
[s] Time without voltage
t
on
[s] Time with voltage
T [s] Total time (t
O
+ t
H
+ t
off
)
U
O
[V] Overexcitation voltage (bridge voltage)
U
H
[V] Holding voltage (half-wave voltage)
U
N
[V] Coil nominal voltage
I
eff
[A] RMS current dependent on switching frequency,
overexcitation time and duty cycle
I
RMS
=
P x P
N
U
N
²
Time Diagram:
T
t
on
t
off
t
O
t
H
Manufacturer-side setting
Overexcitation Time t
O
U
U
O
U
N
U
H
t
Coil Capacity
If the switching frequency is larger than 1
cycle per minute or if the overexcitation
time t
O
is longer than double the separation
time t
2
, please observe the following:
P ≤ P
N
The coil capacity P must not be larger than
P
N
or the nominal current I
RMS
which flows
through the ROBA
®
-multiswitch must not
be exceeded, as otherwise the coil and the
ROBA
®
-multiswitch can fail due to thermic
overload.
At high input voltage and low brake
performance, the initial bridge rectification
of 50 ms can lead to thermal overload.
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
55