Mayr ROBA-stop-S User manual

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 1 of 9 Germany eMail: [email protected]
Please read and observe this Operating Instruction carefully!
A possible malfunction or failure of the clutch and damage may be caused by not observing it.
Table of contents:
Page 1: - Table of contents
- Manufacturer’s declaration
Page 2: - Safety regulations
Page 3: - Safety regulations
Page 4: - Brake views
- Parts list
- Safety and information signs
Page 5: - Design
- Function
- Supply condition
- Assembly conditions
- Brake attachment
- Tacho-attachment (option)
Page 6: - Air gap inspection
- Air gap adjustment
- Exchange of the rotor
Page 7: - Electrical connection
- Release monitoring
Page 8: - Adjustment of the braking torque
- Emergency release
Page 9: - Anti condensation heating (option)
- Condensation water
- Disposal
- Breakdowns
Manufacturer declaration
The product is to be seen as an option or component for installation into machines or equipment according to the machinery directive
98/37 EC. The machinery (product) must not be put into service until the machinery into which it is to be incorporated has been declared
in conformity with the provisions of the applicable EC-directives.
The product corresponds to the low voltage directives 73/23/EEC.
The observance of the relevant EMC-directive 89/336/EEC is to be guaranteed.

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 2 of 9 Germany eMail: [email protected]
Safety Regulations
With this safety regulations no claim on completeness is raised!
Attention!
Hazardous conditions when contacting hot
connections and components.
Only qualified and well-trained specialists should work on
the units to avoid any personal injury or damage to
machinery.
Danger!
 If the electromagnetic brake is used in an improper way.
 If the electromagnetic brake has been modified or
reconverted.
 If the relevant standards of the safety or installation
conditions are not observed.
Attention!
The installation and operating instructions must be
read carefully and all safety regulations observed
before installation and initial operation as danger to
personnel and damage to machinery may be
caused.
The electromagnetic brakes are developed and
manufactured in conformance with the temporally
known rules of the technology and they are basically
considered as fail-safe at the time of the delivery.
Attention:
Based on the guideline 94/9/EC (ATEX-guideline) this product is
not suitable for the application in potential explosive areas
without evaluation of the conformity.
Observe!
 Only qualified and well trained specialists who are familiar
with the transport, installation, initial start-up, maintenance
and operation of the units as well as with the relevant
standards may carry out the corresponding works.
 Technical data and indications (Type tag and
documentation) are to be kept absolutely.
 Correct supply connection according to Type tag.
 Supply connections must not be released and assembly,
maintenance or repair must not be made when the unit is
energized.
 Electrical leads must not be under tension when
connected.
 Check current carrying components regarding damage
before installation. Current carrying components must not
be in contact with water or other liquids.
 The braking torque does not exist any more, if the friction
lining and/or friction surface come into contact with oil or
grease.
Intended use
mayr®-brakes are determined for the use in machines and
equipment and may only be used for the ordered and confirmed
purpose.
The use beyond of the corresponding technical indications is
considered as incorrect.
Notes to the electromagnetic compatibility
(EMC) There are no emissions from the listed single
components within the meaning of the EMC-
directive 89/336/EEC, however, increased
interference levels can occur when working
components are operated outside their specification
limits as for example, energising the brake with
rectifiers, phase demodulators or ROBA®-switch in
the line side.
Therefore, the installation and operating instructions
must be read carefully the EMC-directives are to be
observed.
Conditions of the unit
The catalogue values are reference values, which
can deviate in some cases. When selecting the
brake, site of installation, braking fluctuations,
permissible friction work, behaviour during run-in,
wear and ambient conditions are to be carefully
checked and agreed with the unit manufacturer.
Observe!
 The mounting and connecting dimensions at the site of
installation must match to the size of the brake.
 The brakes are designed for a relative switch on period
of 100 %.
 The brakes are designed for a dry running only.
Should oil, grease, water or similar materials come in
contact with the friction surfaces the braking torque could
be reduced.
 The braking torque depends on the corresponding running-
in condition of the brake.
 The metallic surface of the brake is protected against
corrosion arranged by the factory.
Protection class I
The protection is not only based on the basis isolation, but that
all conductive components must be connected with the
protective conductor (PE) of the fixed installation. In case the
basis isolation fails, no contact voltage can remain existing.
(VDE 0580).
Protection IP 67:
Dust-tight and protection against contact as well as protection
against temporary submerging into water.
Ambient temperature –20°up to +40 °C
Attention!
The torque could be severely reduced in case of temperatures
over or under the freezing point due to dewing or the rotors can
freeze respectively. The user must provide corresponding
counter measures.
Thermal class F (+155 °C)
The magnetic coil as well as the casting compound is designed
for a max. operating temperature of +155 °C.

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 3 of 9 Germany eMail: [email protected]
Safety Regulations
With this safety regulations no claim on completeness is raised!
Necessary protective measures to be
undertaken by the user:
Cover all moving parts to prevent personnel injury as squeezing
and seizing.
Cover dangerously hot magnetic parts to prevent contact.
Attach a conductive connection between magnetic part and
electrical conductor (PE) of the fixed installation
(protection class I) to prevent electrical shock and inspection,
conforming to standards, of the continuous protective
connection to all tangible metallic components.
Protection against high inductive cut-off peaks according to
VDE 0580/2000-07, par. 4.6 by fitting varistors, spark quenching
units or similar, in order to prevent damage of coil insulations or
the burn-off of the switching contact (this protection is included
in the mayr®-rectifiers)
Provide additional necessary safety measures against corrosion
of the brake, if they are used in extreme ambient conditions or in
the open with direct atmospheric influences.
Measures against freezing from armature disc and rotor with
high humidity and deep temperatures.
Standards and Instructions
The brakes are developed and manufactured in conformance
with the national standard DIN VDE 0580, according to the low-
voltage directive 73/23/EEC.
Following directives, standards and guidelines
have been used:
98/37/EC Machinery directive
73/23/EEC Low-voltage directive
89/336/EEC EMC-directive
DIN VDE 0580 Electromagnetic units and components,
general regulations
Following standards are to be observed:
DIN EN ISO
12100-1 and 2 Security of machines
DIN EN61000-6-4 Interference emission
DIN EN61000-6-2 Interference resistance
EN60204 Electrical equipment of machines
Liability
 The information, notes and technical data indicated in the
documentation were at the time of printing on the latest
state.
Claims on brakes already supplied cannot be made valid
from it.
 Liability for damages and breakdowns is not taken over,
with
- ignoring the installation and operating instructions,
- improper use of the brakes,
- arbitrary modification of the brakes,
- inappropriate working at the brakes,
- handling or operating errors.
Guarantee
 The warranty conditions correspond to the sales and supply
conditions of Chr. Mayr GmbH + Co. KG.
 Defects are to be advised immediately after detection to
mayr®.
Test mark
CE corresponding to the low voltage directive 73/23/EEC.
Marking
mayr®-components are clearly identified by means of the
content of the Type tags:
Manufacturer
mayr®
Designation/Type
Article No.
Series number

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 4 of 9 Germany eMail: [email protected]
22
21
25
24
26
23
34
Fig. 1
Parts List
(Only mayroriginal parts are to be used)
1 Gear hub
2 Coil carrier (assembly)
3 Housing
4 Rotor (assembly)
5 Armature disc (assembly)
6 Thrust spring inner pole
7 Cap screw
8 Bushing
9 Emergency release screw
10 Screw plug
11 Copper seal ring
12 Screw plug
13 Copper seal ring
14 Screw plug
15 Copper seal ring
16 Brake plate
17 Hexagon head cap screw
18 O-ring
19 O-ring
20 Washer
21 Eye bolt
22 Washer
23 Hexagon head cap screw
24 Cover (assembly)
25 Hexagon head cap screw
26 Cable gland
27 Micro switch
28 Adjustment washer
28.1 Cap screw
29 Thrust spring external pole
30 O-Ring
31 Flange plate (option / Type dependent)
32 Heating (option)
33 Cap screw
34 Type tag
Fig. 2
Fig. 3
Warning and Attention symbols
Attention!
Danger of injury to persons and damages to
the machine possible.
Note!
Important points to be observed.
29
4
11
10
5
2
3
9
16
31
12/13
4
1
5
19
16
28
27
24
30
31
33
18
2
32
15
6
14
8
7
3
17/20
10

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 5 of 9 Germany eMail: [email protected]
Max. 0,4 mm
Design
ROBA-stop®-S brakes are spring loaded electromagnetic fail
safe brakes.
The ROBA-stop®-S is completely closed in an attached
condition and fulfils the protection IP 67.
Standard features: - micro switch for release monitoring
- emergency hand release
- condensation discharging screw
- air gap inspection hole
Options: - built-in rectifier
- micro switch for wear control
- anti-condensation heating
- Tacho-attachment possibility
- Flange plate
Function
The ROBA-stop®-S brake is a spring loaded electromagnetic
safety brake.
Spring loaded:
In a de-energised condition thrust springs (6 and 29) press
against the armature disc (5). The rotor (4) is held stationary
between the armature disc (5) and the brake plate (16).
The shaft is braked via the gear hub (1).
Electromagnetic:
The armature disc (5) is attracted to the coil carrier (2) against
the spring pressure by the magnetic force of the in the coil
carrier (2).
The brake is released and the shaft is then able to rotate freely.
Safety brakes:
The ROBA-stop®-S brakes reliably and safely when the current
has been switched off, in case of “emergency OFF”, or through
power failure.
Supply condition (Figs. 1 – 3)
The ROBA-stop®-S is factory assembled.
The O-ring (30), included loosely, must be inserted into the
provided groove of the housing (3) for the attachment.
The technical data are given on the Type tag (34).
Check supply condition!
Assembly conditions
Before mounting the ROBA-stop®-S following points are to be
observed in any case:
 The eccentricity of the shaft against the fixing hole P.C.D.
must not exceed 0.4 mm.
(Fig. 4).
 The deviation of the concentric
running of the bolt-on surface
with respect to the shaft
must not exceed the
permissible
tolerance of the mounting
surface according to DIN
42955. Larger deviations
may result in a lower braking
torque, permanent friction of the
rotor and overheating.
 The hub (1) and shaft fits are to be selected to avoid any
distortion of the hub splines (1) (observe the max. jointing
temperature of 200 °C). A widening of the splines c auses a
clamping of the rotor (4) on the hub impairing the brake
function (recommended hub – shaft fit H7/k6).
 Rotor and braking surfaces must be free of oil and
grease.
Brake - attachment
1. Only for designs with flange plate (Pos. 31/option):
Release hexagon head cap screws (23) and remove the
flange plate from the brake. Bolt the flange plate at the
bearing bracket of the motor or at the machine wall with 8
cap screws M16 (Pos. 33) (seal on the customer side);
Observe tightening torque 122 Nm.
2. Unscrew screw plugs (10) with copper sealing rings (11).
3. Remove the brake plate (16) by unscrewing the 8 hexagon
head cap screws (17) (if necessary, use the emergency
release screws (9) as extraction aid).
Important!
Immediately turn the emergency release screws (9) back
to contact (torque max.10 Nm).
4. Remove the rotor (4) from the brake.
5. Mount the gear hub (1) onto the shaft, bring it to the correct
position (observe the supporting length of the key over the
complete hub) and lock it axially (e.g. with a retaining ring).
6. Bolt the brake at the flange plate (31) or at the brake surface
on the customer side (observe centering and correct location
of the O-ring (30) in the keyway).
No damage of the O-ring (30).
Observe the tightening torque of the hexagon head cap
screws (23) 61 Nm.
7. Manually push rotor (4) onto the gear hub (1). An easy
running of the toothing
must be observed.
No damage!
Important!
The rotor (4) must be
located on the hub (1) in
such a way that the
toothing remains
completely engaged
even after wear of the
friction linings (Fig. 5). Fig. 5
8. Re-assemble the brake plate (16), observe the correct
angular position of the emergency release. Observe the
tightening torque of the hexagon head cap screws (17)
41 Nm.
No damage of the O-rings (18 and 19)!
9. Important!
Assure that the emergency release screws (9) are turned
back to contact (revertive torque max. 10 Nm).
10. Screw in screw plugs (10) with copper seal rings (11).
11. Check the air gap according to „air gap inspection“.
Fig. 6
Tacho - attachment (option)
For the attachment of a tachogenerator a separate brake plate
must be used by indicating the location and mounting holes.
Attention must be paid to a suitable seal of the brake on the
customer side.
Fig. 4
T
!

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 6 of 9 Germany eMail: [email protected]
Air gap – inspection (Figs. 7 and 8)
The air gap between coil carrier (2) and armature disc (5) is
increased if the friction linings are worn down. The wear
condition of the rotor (4) must be monitored by regular air gap
inspections.
Air gap inspection with de-energised brake:
1. Unscrew the screw plug (12) incl. copper seal ring (13).
2. Check the air gap by means of a feeler gauge.
The air gap must be between nominal air gap and max. air
gap. If the max. air gap is achieved, re-adjust the air gap
(see Table 1).
Fig. 7
Fig. 8
Table 1
Size 11
Nominal air gap
[mm]
0,40 +0,30
Max. air gap [mm] 1,65
Air gap – Adjustment (Figs. 1, 7 and 8)
The air gap can be re-adjusted twice by removing one layer of
the adjustment washers (Pos. 28; 4 pcs.) at the
housing ((3) Fig. 8).
Air gap adjustment only, when the air gap is
bigger than 0,9 mm.
Attention!
In case of an air gap adjustment the braking
torque does not exist any more due to
removing the brake plate.
A movement of the load must be avoided.
1. Unscrew screw plugs (10) with copper seal rings (11).
2. Remove the brake plate (16) by unscrewing the hexagon
head cap screws (17) (if necessary, use the emergency
release screws (9) as extraction aid).
Important!
Immediately turn the emergency release screws (9) back
to contact (revertive torque max.10 Nm).
3. Loosen the cap screws (28.1), remove one layer of the
adjustment washers (28) and tighten the cap screws (28.1)
with a tightening torque 2,9 Nm again.
4. Clean brake interior (do nut use grease or oil)!
5. Re-assemble the brake plate (16), observe the correct
angular position of the emergency release. Observe the
tightening torque of the hexagon head cap screws (17)
41 Nm.
No damage of the O-rings (18 and 19)!
6. Important!
Assure that the emergency release screws (9) are turned
back to contact (revertive torque max. 10 Nm).
7. Screw in screw plugs (10) with copper seal rings (11) again.
8. Check the air gap according to "air gap inspection".
If the max. air gap is achieved again, the rotor (4) must be
exchanged (see chapter “exchange of the rotor (4)”).
Exchange of the rotor (Pos. 4 / Figs. 1 and 3)
Attention!
The braking torque does not exist any more by
removing the brake plate (16). A movement of
the load must be avoided.
1. Unscrew screw plugs (10) with copper seal rings (11).
2. Remove the brake plate (16) by unscrewing the hexagon
head cap screws (17) (if necessary, use the emergency
release screws (9) as extraction aid).
Important!
Immediately turn the emergency release screws (9) back
to contact (revertive torque max.10 Nm).
3. Clean the brake interior (do nut use grease or oil)!
4. Attach the adjustment washers ((28) 8 pcs.), included to the
new exchange-rotor (3), at the housing front face ((3) Fig. 8)
turned towards the brake plate, using the 4 included cap
screws (28.1) (observe correct position) with a tightening
torque 2,9 Nm.
Important!
When fitting a new rotor all eight adjustment
washers (28) must be assembled!
5. Manually remove the worn rotor and locate the new
exchange-rotor again.
Observe an easy running of the toothing.
Important!
The rotor (4) must be located onto the hub in such a way
that the toothing remains engaged completely even if the
friction linings are worn down.
6. Re-assemble the brake plate (16), observe the correct
angular position of the emergency release. Observe the
tightening torque of the hexagon head cap screws (17)
41 Nm.
No damage of the O-rings (18 and 19)!
7. Important!
Assure that the emergency release screws (9) are turned
back to contact (revertive torque max. 10 Nm).
8. Screw in screw plugs (10) with copper seal rings (11).
9. Check the air gap according to "air gap inspection".
Air gap
inspection hole
pos. 17
pos. 3
Feeler gauge
Air gap
inspection hole
Air gap
Adjusting washer pos. 28
160x35x0,5 (8 pcs)
Cap screw pos. 28.1
M4x6 DIN 912 (4 pcs)

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 7 of 9 Germany eMail: [email protected]
Electric connection (Figs. 9 and 10)
The coil voltage and if necessary the voltage of the option anti
condensation heating is indicated on the Type tag (34) of the
brake.
A DC voltage is necessary for the operation of the coil. This can
be generated via Trafo-rectifiers or half-wave rectifiers. The
mayr®rectifiers already include varistors to protect the switching
contacts and the coil.
A wiring diagram is glued in the cover (24) of the terminal box.
Minimum cable cross-section for coil connection: 1,5 mm2
The anti condensation heating is provided with AC current.
Example for an electric connection
 With terminal block
 With micro switch for release monitoring
 With anti condensation heating
Fig. 9
Example for an electric connection
 With mayr®rectifier
 With micro switch for release monitoring
 With anti-condensation heating
Fig. 10
Note:
For a fast application time a switch contact with "S1"
is necessary, i.e. a DC side switching.
Release monitoring (Fig. 11)
The release monitoring system gives a signal when the brake is
released, i. e. the switch is actuated with:
a) energized coil (electromagnetic release)
b) actuation of emergency release system
From the time when the brake is energised a period of three
times the separation time must be passed, before the micro
switch signal of the release monitoring system is evaluated.
The micro switch (27) is set at the factory. In case a re-setting is
necessary, it can be made directly from the terminal box.
Adjustment of the micro switch
The micro switch is located inside the terminal box beneath the
terminal block (rectifier) integrated in the housing.
The adjustment of the micro switch is done with a de-energized
coil. The air gap must be according to
the nominal air gap 0,4 +0,30.
Procedure:
1. Check the air gap between coil carrier (2) and armature
disc (5).
2. Unscrew terminal box cover (24).
3. Slightly unscrew fixing screws of the holding bracket at
the micro switch (27).
4. Axially displace micro switch position (with the aid of a screw
driver) ).
Observe following:
a) feeler gauge "X" = 0,15 mm: micro switch must not
switch (contact red - blue open).
b) feeler gauge "X" = 0,25 mm: micro switch must switch
(connection red - blue closed).
5. Tighten fixing screw of the holding bracket at the micro
switch (27).
6. Attach terminal block (rectifier).
7. Screw terminal box cover (24) again.
Fig. 11
Attention!
If the air gap between the coil carrier (2) and the armature
disc (5) exceeded the nominal value by wear of the rotor, the
difference has to be considered with the micro switch
adjustment.
Example: Air gap = 0,75 mm
The adjusting dimension "X" has to be increased by
0,75 mm - 0,4 mm = 0,35 mm
(0,5 for not switching, 0,6 for switching).
X
Detail Y
5
0,40
+0,30
27
24
2
Y
Nom. air gap
N
L1
L2
L3
1 2 3 4
5
6
7
8
9
10
Contacts
potantialfree
Netz
AC
S1 Sp1
1 2 3 4
5
6
7
8
9
10
Contacts
potentialfree
Netz
AC S1 Sp1
Voltage supply
for
anti-condensation
heating
(AC)
AC-switching
Motor
protection
switch Brake coil
anti-condensation heating (AC)
Micro switch
release monitoring
N
L1
L2
L3
Voltage supply for
anti-condensation heating
DC-voltage
for
brake coil Earthing
Varistor
(by customer)
Break coil
Anti-condensation
heating (AC)
Micro switch
release
monitoring
Protective switch

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 8 of 9 Germany eMail: [email protected]
Adjusting the braking torque (Figs. 1 and 2)
The ROBA-stop®seawater brake size 11 is adjusted to the
nominal torque or braking torque requested in the order in the
factory.
The braking torque is adjusted by an uniform removal or adding
of thrust springs (6 and 29) at the internal pole or external pole
of the coil carrier (2) according to Table 2.
Attention!
By removing the brake plate (16) the braking
torque is compensated. A movement of the
load must be prevented.
Procedure:
1. Remove the brake plate (16) by unscrewing the hexagon
head cap screws (17) (if necessary, use the emergency
release screws (9) as forcing aid, observe adjustment
washers (28)).
Important!
Turn back the emergency release screws (9)
immediately to contact again
(revertive torque max. 10 Nm).
2. Remove the rotor (4).
3. Uniformly unscrew 3 cap screws (7), which axially hold
(guide), uniformly loosen, the armature disc (5) with the
bushings (8) until you can take out the armature disc.
Attention! Armature disc is under spring pretension.
4. Remove the wear particles and clean the brake.
Do not use any grease or oil!
5. Adjust the required torque by uniform removal or adding of
the thrust springs (6 and 29) out of the coil carrier (2)
(see Table 2).
One spring at the inner pole corresponds to 102 Nm
One spring at the outer pole corresponds to 61 Nm
Important!
The thrust springs (6) at the inner
pole of the coil carrier and the
outer pole of the coil carrier must not be
exchanged (see Table 2).
6. Insert the armature disc (5).
Pay attention that both pins lying next to each other
project into the terminal box for actuation of the micro
switch.
7. Screw the armature disc (5) with cap screws (7) and located
bushings (8) again,
observe tightening torque 99 Nm.
8. Slip on the rotor (4). Observe an easy running of the toothing.
Important!
The rotor (4) must be located on the hub (1) in
such a way that the toothing remain completely
engaged even after wear of the
friction linings.
9. Assembly the brake plate (16) with adjusting washers (28)
again, hereby observe the correct angular position of the
emergency release. Observe the tightening torque of the
hexagon head cap screws(17) 41 Nm.
No damage of the O-rings (18 and 19)!
10. Important!!
Ensure that the emergency release screws (9)
are turned back until contact
(revertive torque max. 10 Nm).
11.Screw in screw plugs (10) incl. copper seal rings (11) again.
Table 2: Spring assembly
Number of springs Ø 22 / 4,5x50
at the inner pole (pos. 6)
Brake
torque
[Nm] 2 3 4 5
2 326 428 530 632
3 387 489 591 693
4 448 550 652 754
Number of springs
Ø 19/3,6x38 at the outer pole
(pos. 29)
5 509 611 713 815
Emergency release system (Fig. 12)
In case of a breakdown or power failure the brake remains
engaged and cannot be released electrically any more. In this
case an emergency release actuated manually can be carried
out.
1. Unscrew screw plugs (10) with copper seal rings (11).
2. Uniformly screw in both emergency release screws (9) until
the load contacting the motor starts to move.
Attention with hoisting drives!
The braking torque does not exist any more, when the
emergency release has been actuated.
A fall of the load must be avoided.
Interrupt the release operation by some stops
(turning back the emergency release screws), so
that no too large acceleration of the load and
heating of the brake occurs.
3. After the emergency release operation has been finished
unscrew both emergency screws (9) until contact
(revertive torque max. 10 Nm).
4. Screw in screw plugs (10) incl. copper seal rings (11) again.
Fig. 12
29
4
11
10
5
2
3
9
16
31
12/13

Installation and Operating Instructions
for ROBA-stop®-S Size11 (B.8.3.1.GB)
25/10/2005 K/TK/BG/KR Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-241
Eichenstraße 1 Fax: 08341 / 804-422
87665 Mauerstetten http://www.mayr.de
Page 9 of 9 Germany eMail: [email protected]
Anti-condensation heating (option)
The anti-condensation heating is used to eliminate any
condensation inside the brake. Connection of the
anti-condensation heating (AC voltage) according to the
wiring diagram.
Condensation water (Fig. 13)
A regular condensation water – inspection must be made by
means of the screw plug (14) with its copper seal ring (15).
Fig. 13
Disposal
The components of our Electromagnetic Brakes must separately
be supplied to the utilisation due to the different material
components. Additionally the legal instructions are to be
observed. Code numbers can change with the kind of the
separation (metal, plastic and cable).
Electronic components
(rectifier / ROBA®-switch / micro switch):
The assembled products can be supplied to the material
utilization according to code No. 160214 (mixed materials) or
components should either be given to the recycling process acc.
to code No. 160216 or be disposed of by a certified waste
removal company.
Brake body made of steel with coil/cable
and all other steel components:
Scrap (Code No. 160117)
Aluminium components:
Non-ferrous metal (Code No. 160118)
Brake rotor (steel or aluminium with friction lining):
Brake linings (Code No. 160112)
Seals, O-rings, V-Seal, Elastomere,
Terminal boxes (PVC):
Plastic (Code No. 160119)
Breakdowns:
Failures Possible reasons Solution
Brake does not release
 Wear between armature disc and coil carrier
 Air gap too big
 Air gap too small (distance rings have been
removed before max. air gap was achieved)
 Coil interrupted
 Rectifier failed
 False voltage measured at the rectifier
 Clean brake
 Adjust the brake; replace the rotor
 Insert adjusting washers between housing and
brake plate
 Replace brake
 Replace rectifier
 Provide correct voltage
Brake does not brake  Emergency release screws are not unscrewed
 Oil or grease not on the friction linings
 Unscrew emergency release screws
 Replace rotor
Signal for release
monitoring not
provided
 Wear between armature disc and coil carrier
 Switching position not correct
 Micro switch defective
 Clean brake
 Newly adjust switch
 Replace switch
15
14
Condensation water
discharging hole