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K.891.V08.GB
ROBA-stop ?
-M
Safety brake for
Brake motors
Automation systems Hoisting devices Invalid carriages
Electromagnetic safety brake
q fast and economic assembly
q high protection IP 54 / IP 65 (TüV certified)q maintenance-free for rotor lifetime
your reliable partner
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ROBA-stop ?-M Electromagnetic Safety Brake
Brake Dimensioning Safety Regulations – Types Electrical Connection Electrical Accessories insulation class F;100 % duty cycle
easy installation
different torque settings due to different spring configurations
short switching times
Atex design available
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ROBA-stop ?-M Electromagnetic Safety Brake
Order example:for Atex approved brakes please contact the manufacturer
Size F F 1f G
H K 248.5102.5816.5161045410881814.510.8863.5117.582217.512.516771318332612.332881691036278.360100.5228.514382612100123267144834121501333471955412025015349423654620500
179
520
23
85
54.5
22
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ROBA-stop ?-M Electromagnetic Safety Brake
1)
Braking torque tolerance = +30 % / - 10 %, for other settings see Table 3, page 7 and Type chart page 3
1.1)Braking torque tolerance = +40 % /-20 % (slight grinding is necessary)2)The respective maximum bores are to be seen in relation to the respective
keyways and their tolerances according to Table 2 page 63)Brake operation from 700 Nm upward only possible on overexcitation 4)Hub front face (on both sides), depth 3 mm, max. recess ? 97 mm
Technical Data and Dimensions
Cable approx. 400 mm long for sizes 2–60,for sizes 100–500 approx. 600 mm long
Braking torque Braking torque Max.Input standard brake holding brake speed power Type 891.0
2_ _._Type 891.1_ _._M nom 1)M nom 1.1)n
P 20Size [Nm][Nm]
[rpm][W]2246000194485000258816400029161632350038323264300046606010030006910010018030008815015025015009825025045015001205005001.1)
800
3)
1500152
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ROBA-stop?-M Electromagnetic Safety Brake
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?6ROBA-stop?-M Technical Explanations
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ROBA-stop ?-M Technical Explanations
Table 4
Torque - Time - Diagram
ON OFF
Size M 2[Nm]
t 1– [ms]
2210441888201616303232506060551001006815015080250250100500
500
100
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Q r tot.J Rotor + Hub with d max [kgm 2][J]891.0
1_ _._891.2_ _._95 x 1060.12 x 10-40.1 x 10-47 x 106100 x 1060.21 x 10-40.17 x 10-48 x 106162 x 1060.67 x 10-40.58 x 10-413 x 106500 x 106 1.74 x 10-4 1.53 x 10-420 x 106600 x 106 4.48 x 10-4 4.1 x 10-4
45 x 106
700 x 106
6.74 x 10-4–130 x 106
840 x 106
16.54 x 10-4–170 x 106
950 x 106
31.68 x 10-4–300 x 10
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1000 x 10661.82 x 10-4–350 x 1062000 x 106222.6 x 10-4
–
500 x 106
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ROBA-stop ?-M Technical Explanations
Friction Power Diagram (Type 891.0
2_ _._)
Due to operating parameters such as slipping speed, pressing or temperature; the wear values can only act as guidelines.
n = 1500 rpm
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ROBA-stop ?-M Electromagnetic Safety Brake
Electrical Basic Principles – General
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Electrical Connection
DC current is needed to operate the brake. Both the Type tag and the brake body show the coil voltage, which takes as reference the DIN IEC 60038 (±10 % tolerance). The brake can be operated using alternating voltage and a rectifier or with any other suitable DC power supply. The exact connection possibilities depend on the brake equipment. The exact terminal layout is shown in the wiring diagram. The relevant regulations and standards (e.g. DIN EN 60204-1 and DIN VDE 0580) are to be observed by engineer and operator. Please double check that these regulations are followed.
Earthing Connection
The brake is designed for Protection Class I. This protection covers not only the basic insulation but also the connection of all conductive parts to the PE conductor on the fixed installation. If the basic insulation fails, no contact voltage will remain. Please carry out a standardized inspection of the PE conductor connections to all contactable metal parts!
Device Safety
To protect against damage from short circuits, please add suitable device fuses to the mains cable.
Switching Behaviour
The operational behaviour of a brake is to a large extent dependent on the switching mode used. Furthermore, the switching times are influenced by the temperature and the air gap between the armature disc and the coil carrier (dependent on the wear condition of the linings).
Magnetic Field Build-up
When the voltage is switched on, a magnetic field is built up in the brake coil, which attracts the armature disc to the coil carrier and releases the brake.
Field Build-up with Normal Excitation
If we energise the magnetic coil with nominal voltage, the coil voltage does not immediately reach its nominal value. The coil inductivity causes the current to rise slowly as an exponential function.Accordingly, the build-up of the magnetic field occurs more slowly and the braking torque drop (curve 1) is also delayed.
Field Build-up with Overexcitation
A quicker and safer drop in braking torque is achieved if the coil is temporarily placed under a higher voltage than the nominal voltage,as the current increases more quickly. Once the brake is released, it is possible to switch to the nominal voltage (curve 2). The relationship between overexcitation and switching time is roughly proportional up to four times the nominal voltage; e.g. at double nominal voltage, the switching time for brake release is halved. The effective capacity may however not be larger than the nominal capacity of the coil. This principle is used by the ROBA ?-switch fast acting rectifier as well as the phase demodulator.
Removal of Magnetic Field
AC-side switching
The power circuit is interrupted between the mains supply and the rectifier. The magnetic field slowly reduces. This delays the rise in braking torque.
When switching times are not important, please switch AC-side,as no protective measures are necessary for coil and switching contacts.
? virtually silent switching , however, the brake engagement time is
longer (c. 6 - 10 times longer than with DC-side switching).Use for non-critical braking times.
DC-side switching
The power circuit is interrupted between the rectifier and the coil,as well as mains-side. The magne-tic field is removed very quickly,resulting in a rapid rise in braking torque.
When switching DC-side, high voltage peaks are produced in the coil, which lead to wear on the contacts from sparks and to destruction of the insulation.
? short brake engagement time
(e.g. for emergency
OFF operation). However, this produces louder switching noises.
Protective Circuit
When using DC switching, the coil must be protected by a suitable protective circuit according to VDE 0580, which is integrated in mayr ?rectifiers. To protect the switching contact from consumption when using DC-side switching, additional protective measures are necessary (e.g. series connection of switching contacts). The switching contacts used should have a minimum contact opening of 3 mm and should be suitable for inductive load switching. Please also make sure on selection that the rated voltage and the rated operation current are sufficient. Depending on the application, the switching contact can also be protected by other protective circuits (e.g. mayr ?spark quencher),although this may of course then alter the switching times.
F1: external fuse
F1: external fuse
Half-wave Rectifiers and Bridge Rectifiers
Type 02_.000.6
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?D 3.54.54.5VDC = VAC x 0.453/024*******.02.4Half-wave Rectifier 195
Mounting bracket set for 35 mm rail (EN50022)
Dimension Sheet For Phase Demodulator Type 012.00_.2
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Order example:
To be stated on order:
Size
Type
Order number:
_0 1 2 . 0 0 _. 2
Application
Phase demodulators are used to connect DC units to alternating vol-tage supplies. Due to automatic switching from the applied overexcitation voltage to the holding voltage, the switching time is improved and the power dissipation is reduced by the reduction of the holding voltage after the anchor has attracted.
Phase demodulators cannot be used in all https://www.doczj.com/doc/036083080.html,ing the phase demodulator is not possible when, for example, operating with damped brakes. Therefore, the usability is to be checked in advance.
Function
The phase demodulator is provided for the operation of an input voltage of 230 VAC.
The coil is energised after the input voltage is switched on with an overexcitation voltage. After the overexcitation time has passed, the unit switches automatically to the holding voltage. Additionally, the phase demodulator has an integrated automatic DC-side switch-off.Contrary to the conventional DC-side switch-off, no further protective measures or external components are necessary. The integrated automatic DC-side switch-off can be deactivated by fitting a jumper.
Technical Data (Type 012.00_.2)
Input voltage 230 VAC, ±10 %, 50 Hz Output voltage 52 VDC, ±35 %- Holding voltage Output voltage
190 VDC
-Overexcitation voltage Overexcitation time 150 ms, ±20 % plus ±10 ms Output current 1 A, I eff /45 °C Max. coil capacity
130 Watt Max. switching frequency 2/sec.
Protection
IP 65 components,IP 20 terminals
Nominal cross-section 1.5 mm 2, (AWG 22-14)Ambient temperature -25 °C to +85 °C Storage temperature -40 °C to +105 °C Conformity marks UL, CE
Protection fuse
FF 5 A (H), 5 x 20 mm
Wiring Example
Cycle sequence
Size 1 (230 VAC)
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Dimensions (mm)
Special designs with different input and output voltages as well as different overexcitation times are available on request!
Accessories:
Mounting bracket set for 35 mm rail acc. to EN 50022Article No. 1802911
ROBA ?-switch
Type 017.000.2
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Order Example:
To be stated on order:
Size
Type
Order number:
_0 1 7 . 0 0 0 . 2
Sizes 0 – 3
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.
.
.
Dimensions (mm)
Application
ROBA ?-switch units are used to connect DC units to alternating voltage supplies; for example, to electromagnetic brakes and clutches (ROBA ?-stop, ROBA ?-quick, ROBATIC ?), as well as electromagnets,electrovalves etc.
Fast acting rectifier ROBA ?-switch 017.000.2
?two operation modes for inductive loads with overexcitation and power reduction
?input voltage: 115 – 500 VAC
?max. output current: 2 A at 230 VAC ?UL-approved (up to 300 VAC)
Function
ROBA ?-switch units are used for operation at supply connection voltages of 115 to 500 AC.
They can switch automatically internally from bridge rectification to half-wave rectification.The output voltage is:for bridge rectification U bridge = 0.9xU AC [VDC]for half-wave rectification
U half-wave = 0.45xU AC [VDC]
The time for bridge rectification is set at 450 ms (standard)manufacturer-side and can be modified by replacing the external resistor R ext from 0.05 to 2 s.
Electrical Connection (Terminals)
1 + 2AC supply voltage (fitted protective varistor)3 + 4
Connection for an external switch
(note: if a bridge is fitted, switch-off takes place only AC-side with longer brake engagement time)
5 + 6DC Output voltage (fitted protective varistor)
7 + 8
Terminal for resistor, R ext for bridge rectifying timing
Technical Data
Input voltage Table 1Output voltage Table 1
Protection
IP 65 components, IP 20 terminal, IP10 R ext Nominal cross-section 1.5 mm 2, (AWG 22- 14)Ambient temperature -25 oC up to +70 oC Storage temperature -40 oC up to +105 oC Weight
103g / 3.63 oz.Conformity marks UL, CE Installation position user-defined
Installation environment
Do not install near to sources of intense heat! Please ensure
sufficient heat dissipation and air convection.
Terminals
Max. torque for the screws 0.5 Nm
ROBA ?-switch – sizes, Table 1
size size size size 0
123Input voltage 115230230..400...VAC ±10 %..400..500Output voltage 104207207..360...VDC, U bridge ..360..450Output voltage 52104104..180...VDC, U half-wave ..180..225Output current at 2.0 2.0 1.8 1.8≤45 °C, (A), I eff Output current at 1.0 1.00.90.9max. 70 °C, (A), I eff
Fitted protective varistors 275
275
550550
on AC and DC connections CE,Conformity marks
UL,CE UL,CE
UL up CE
to 300V
Accessories:
Mounting bracket set for 35 mm rail acc. to EN 50022Article No. 1802911
ROBA ?-switch Type 017.100.2
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Accessories:
Mounting bracket set for 35 mm rail acc. to EN 50022Article No. 1802911
Spark Quenching Unit Type 070.000.6
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