Mayr ROBA-multiswitch 019.00.2 Series Installation And Operating Instructions Manual page 5

Installation and Operating Instructions for
ROBA -multiswitch Type 019._00.2
®
Overexcitation Time t
Increased wear (enlarged air gap) as well
as coil heat lengthen the brake separation
time t . Therefore, when dimensioning the
2
overexcitation time t
double the separation time t
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.
Coil Capacity
If the switching frequency is larger than 1
cycle per minute or if the overexcitation
time t is longer than double the separation
O
time t , please observe the following:
2
P ≤ P
N
The coil capacity P must not be larger than
P or the nominal current I
N
through the ROBA
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.
Time Diagram:
U
t
on
t
O
U
O
U
N
U
H
0
29/03/2022 GC/TH/MA/SU
Page 5 of 6
O
, please select at least
O
on each brake
2
which flows
RMS
-multiswitch must not
®
T
t
off
t
H
t
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:
DIP switch
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
Manufacturer-side setting
Calculations:
P [W] RMS coil capacity dependent on switching
frequency, overexcitation, reduction in capacity
and duty cycle
P x t
O O
P =
P [W] Coil nominal capacity (catalogue values, Type
N
tag)
P [W] Coil capacity on overexcitation
O
U
O
( )²
P =
U
O
N
P [W] Coil capacity at reduced capacity
H
U
H
(
P =
U
H
N
t [s] Overexcitation time
O
t [s] Time of operation with reduction in capacity
H
t [s] Time without voltage
off
t [s] Time with voltage
on
T [s] Total time (t + t
O
U [V] Overexcitation voltage (bridge voltage)
O
U [V] Holding voltage (half-wave voltage)
H
U [V] Coil nominal voltage
N
I [A] RMS current dependent on switching frequency,
eff
overexcitation time and duty cycle
P x P
I =
RMS
public.mayr@mayr.com
(B.019+002.EN)
Overexcitation time t
O
[s]
0.15
0.45
1.00
1.50
2.15
+ P x t
H H
T
x P
N
)²
x P
N
+ t )
H off
N
²
U
N
5 5