Kendrion EEX Series User manual

KENDRION INDUSTRIAL BRAKES
EEX Line
Spring-applied single-disc brake
Operating Instructions 76..G..B00
Types: 76 14G10B00 76 16G10B00 76 24G10B00 76 26G10B00
76 14G11B00 7616G11B00 76 24G11B00 76 26G11B00
76 14G13B00 76 16G13B00 76 24G13B00 76 26G13B00
76 14G16B00 76 16G16B00 76 24G16B00 76 26G16B00
76 14G19B00 76 16G19B00 76 24G19B00 76 26G19B00
76 14G24B00 76 16G24B00 76 24G24B00 76 26G24B00

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 2 of 34
Contents
1. General ................................................................................................................................................... 3
1.1 Introduction ........................................................................................................................................... 3
1.2 Standards and directives ...................................................................................................................... 3
1.3 Declaration of Incorporation (in accordance with Annex II, part 1, Section B of Machinery Directive
2006/42/EC).......................................................................................................................................... 4
1.4 Declarations of conformity .................................................................................................................... 5
1.4.1 ATEX Directive 2014/34/EU (equipment and protective systems intended for use in potentially
explosive atmospheres) ..................................................................................................................... 5
1.4.2 Directives 2014/35/EU (Low Voltage Directive) and 2011/65/EU (RoHS Directive).......................... 6
1.5 Manufacturer's liability .......................................................................................................................... 6
2. Product description............................................................................................................................... 7
2.1 Operating principle................................................................................................................................ 7
2.2 Brake design ......................................................................................................................................... 7
3. Installation............................................................................................................................................ 10
3.1 Mechanical installation........................................................................................................................ 10
3.2 Installation of the hand release (29) (brake types with hand release)................................................ 11
3.3 Electrical connection and operation.................................................................................................... 11
3.3.1 AC power supply .............................................................................................................................. 12
3.3.2 Microswitch (13) and thermoswitch (11 & 12) connection ............................................................... 14
3.4 Electromagnetic compatibility ............................................................................................................. 15
3.5 Set-up and start-up ............................................................................................................................. 17
3.6 M2rated torque adjustments............................................................................................................... 18
4. Maintenance......................................................................................................................................... 19
4.1 Checks and service............................................................................................................................. 19
4.2 Spare parts and accessories .............................................................................................................. 22
5. Condition at delivery........................................................................................................................... 22
6. Emissions............................................................................................................................................. 23
6.1 Noise ................................................................................................................................................... 23
6.2 Heat..................................................................................................................................................... 23
7. Troubleshooting .................................................................................................................................. 24
8. Safety .................................................................................................................................................... 25
8.1 Intended use ....................................................................................................................................... 25
8.2 General safety information.................................................................................................................. 25
8.2.1 Set-up............................................................................................................................................... 26
8.2.2 Start-up............................................................................................................................................. 26
8.2.3 Installation ........................................................................................................................................ 26
8.2.4 Operation.......................................................................................................................................... 26
8.2.5 Maintenance, repair and replacement.............................................................................................. 27
8.3 Warning symbols ................................................................................................................................ 27
9. Definitions ............................................................................................................................................ 28
10. Technical specifications ..................................................................................................................... 30
11. Product versions (types) .................................................................................................................... 33
12. Product number / type number / version number............................................................................ 33
13. Specialist repair shops ....................................................................................................................... 33
14. Revision history................................................................................................................................... 33
Document information:
Issued by: Kendrion (Villingen) GmbH Last updated: 13/03/2020
Replaces document: - Replaces the issue dated: 01/04.2018
Document type:translation of original German operating Document status: released
instructions BA 76 ..G..B00
Document title: BA 76 ..G..B00 Englisch

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 3 of 34
1. General
1.1 Introduction
These operating instructions describe the operating principle and features of the spring-applied brake types
76 ..G..B00. The safety information provided in this manual must be strictly observed during the set-up of the
machine (e.g. motor) and during the start-up, operation and maintenance of the spring-applied brake.
Should any queries arise with respect to torques, torque variations, installation position, wear, wear reserve,
switching work, break-in conditions, release range, ambient conditions and the like, please contact Kendrion
(Villingen) and ask for clarification before starting to use the brake. Spring-applied brakes are not ready-to-use
devices, but are intended to be incorporated into or assembled with other equipment. Consequently, they will
be referred to as components in the following sections.
1.2 Standards and directives
The state-of-the-art brakes have been designed, built and tested in accordance with the requirements of DIN
VDE 0580 concerning electromagnetic devices and components.
The brakes are intended for use in dust and potentially explosive atmospheres. Brake versions protected to
IP56 are only designed for use in potentially explosive atmospheres. The brakes are suitable for ambient
temperatures between -20°C and +40°C. They are approved to the ATEX Directive (2014/34/EU).
Approvals: dust & explosion protection II Option: explosion protection II
II 2G Ex db eb IIC T5 Gb; -20°C ≤ Ta ≤ 40°C II 2G Ex db eb IIC T4 Gb
II 2D Ex tb lllC T95°C Db IP67 IP56; -20°C ≤ Ta ≤ 40°C
DMT 02 ATEX E 122 X DMT 02 ATEX E 122 X
IECEX BVS 11.0025X IECEX BVS 11.0025X
Being classified as “electromagnetic components”, spring-applied brakes are also subject to the Low Voltage
Directive 2014/35/EU. The user is required to employ suitable switching devices and controls to ensure use of
the brakes in accordance with EMC Directive 2014/30/EU.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 4 of 34
1.3 Declaration of Incorporation
(in accordance with Annex II, part 1, Section B of Machinery Directive 2006/42/EC)
We hereby declare that the products below comply with the essential health and safety requirements specified
in Annex I of Machinery Directive 2006/42/EC:
Annex I General Principles and Sections 1.1.2, 1.1.3, 1.1.5, 1.3.2, 1.5.1
The partly completed machinery must not be put into service until the final machinery into which it is to be
incorporated has been declared in conformity with the provisions of Machinery Directive 2006/42/EC. The
relevant technical documentation required for the partly completed machinery has been compiled in
accordance with Annex VII, part B of Machinery Directive 2006/42/EC. The manufacturer undertakes to submit
an electronic copy of the relevant technical documentation compiled for the partly completed machinery if
reasonably requested by national authorities.
Manufacturer: Kendrion (Villingen) GmbH Person authorized Dominik Hettich
Wilhelm-Binder-Str. 4-6 to compile the Kendrion (Villingen) GmbH
78048 Villingen-Schwenningen documentation: Wilhelm-Binder-Str. 4-6
Germany 78048 Villingen-Schwenningen
Germany
Applied harmonized standards and other technical standards and regulations:
EN 60529 Enclosure protection ratings
DIN VDE 0580 Electromagnetic devices and components
EN 60079-0:2012/A11:2013 Explosive atmospheres –
IEC 60079-0:2011 (modified) + IS1:2013 Part 0: Equipment – General requirements
EN 60079-1:2014 Explosive atmospheres –
IEC 60079-1:2014 Part 1: Equipment protection by flameproof enclosures “d”
EN 60079-7:2015 Explosive atmospheres –
IEC 60079-7:2015 Part 7: Equipment protection by increased safety “e”
EN 60079-31:2014 Explosive atmospheres –
IEC 60079-31:2013 Part 31: Equipment dust ignition protection by enclosure “t”
Product: Electromagnetically released spring-applied single-disc brake
Types:76 14G10B00 76 16G10B00 76 24G10B00 76 26G10B00
76 14G11B00 76 16G11B00 76 24G11B00 76 26G11B00
76 14G13B00 76 16G13B00 76 24G13B00 76 26G13B00
76 14G16B00 76 16G16B00 76 24G16B00 76 26G16B00
76 14G19B00 76 16G19B00 76 24G19B00 76 26G19B00
76 14G24B00 76 16G24B00 76 24G24B00 76 26G24B00
Kendrion (Villingen) GmbH Villingen Authorized signatory: .......................................................
13/03/2020 Dominik Hettich
(Head of Development)

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 5 of 34
1.4 Declarations of conformity
1.4.1 ATEX Directive 2014/34/EU (equipment and protective systems intended for use in potentially
explosive atmospheres)
We hereby declare that the products below, specifically the product versions brought into circulation, have
been designed and built in accordance with the requirements of Directive 2014/34/EU (ATEX Directive). This
declaration will cease to be valid if modifications are made to the product without prior permission from the
manufacturer.
Manufacturer: Kendrion (Villingen) GmbH Person authorized: Dominik Hettich
Wilhelm-Binder-Str. 4-6 Kendrion (Villingen) GmbH
78048 Villingen-Schwenningen Wilhelm-Binder-Str. 4-6
Germany 78048 Villingen-Schwenningen
Germany
Applied harmonized standards and other technical standards and regulations:
EN 60529 Enclosure protection ratings
DIN VDE 0580 Electromagnetic devices and components
EN 60079-0:2012/A11:2013 Explosive atmospheres –
IEC 60079-0:2011 (modified) + IS1:2013 Part 0: Equipment – General requirements
EN 60079-1:2014 Explosive atmospheres –
IEC 60079-1:2014 Part 1: Equipment protection by flameproof enclosures “d”
EN 60079-7:2015 Explosive atmospheres –
IEC 60079-7:2015 Part 7: Equipment protection by increased safety “e”
EN 60079-31:2014 Explosive atmospheres –
IEC 60079-31:2013 Part 31: Equipment dust ignition protection by enclosure “t”
Product: Electromagnetically released spring-applied single-disc brake
Types:76 14G10B00 76 16G10B00 76 24G10B00 76 26G10B00
76 14G11B00 76 16G11B00 76 24G11B00 76 26G11B00
76 14G13B00 76 16G13B00 76 24G13B00 76 26G13B00
76 14G16B00 76 16G16B00 76 24G16B00 76 26G16B00
76 14G19B00 76 16G19B00 76 24G19B00 76 26G19B00
76 14G24B00 76 16G24B00 76 24G24B00 76 26G24B00
Notified body: DEKRA EXAM GmbH EC type-examination
Dinnendahlstr. 9 certificate: DMT 02 ATEX E 122 X
44809 Bochum
Germany IECEx certificate: IECEx BVS 11.0025X
Kendrion (Villingen) GmbH Villingen Authorized signatory: .......................................................
13/03/2020 Dominik Hettich
(Head of Development)

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 6 of 34
1.4.2 Directives 2014/35/EU (Low Voltage Directive) and 2011/65/EU (RoHS Directive)
We hereby declare that the products below, specifically the product versions brought into circulation, have
been designed and built in accordance with the requirements of Directives 2014/35/EU (Low Voltage Directive)
and 2011/65/EU (RoHS Directive). The products are classified as category 11 equipment subject to Directive
2011/65/EU (RoHS Directive). This declaration will cease to be valid if modifications are made to the product
without prior permission from the manufacturer.
Manufacturer: Kendrion (Villingen) GmbH Person authorized: Dominik Hettich
Wilhelm-Binder-Str. 4-6 Kendrion (Villingen) GmbH
78048 Villingen-Schwenningen Wilhelm-Binder-Str. 4-6
Germany 78048 Villingen-Schwenningen
Germany
Applied harmonized standards and other technical standards and regulations:
EN 60529 Enclosure protection ratings
DIN VDE 0580 Electromagnetic devices and components
EN 60079-0:2012/A11:2013 Explosive atmospheres –
IEC 60079-0:2011 (modified) + IS1:2013 Part 0: Equipment – General requirements
EN 60079-1:2014 Explosive atmospheres –
IEC 60079-1:2014 Part 1: Equipment protection by flameproof enclosures “d”
EN 60079-7:2015 Explosive atmospheres –
IEC 60079-7:2015 Part 7: Equipment protection by increased safety “e”
EN 60079-31:2014 Explosive atmospheres –
IEC 60079-31:2013 Part 31: Equipment dust ignition protection by enclosure “t”
Product: Electromagnetically released spring-applied single-disc brake
Types: 76 14G10B00 76 16G10B00 76 24G10B00 76 26G10B00
76 14G11B00 76 16G11B00 76 24G11B00 76 26G11B00
76 14G13B00 76 16G13B00 76 24G13B00 76 26G13B00
76 14G16B00 76 16G16B00 76 24G16B00 76 26G16B00
76 14G19B00 76 16G19B00 76 24G19B00 76 26G19B00
76 14G24B00 76 16G24B00 76 24G24B00 76 26G24B00
Kendrion (Villingen) GmbH Villingen Authorized signatory: .......................................................
13/03/2020 Dominik Hettich
(Head of Development)
1.5 Manufacturer's liability
The manufacturer will not assume any responsibility for damage caused by failure to use the products in
accordance with their intended use or by failure to observe safety information and other instructions provided
in this manual. The information in this manual was correct and up-to-date before going to print. The information
contained herein shall not entitle users to raise claims with respect to components purchased at an earlier
date.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 7 of 34
2. Product description
2.1 Operating principle
The spring-applied single-disc brake is designed to operate dry. The force generated by an electromagnetic
field is utilized to overcome the braking effect produced by the spring force. The spring-applied single-disc
brake engages in unpowered condition and releases when AC voltage is applied. The form-fit connection
between the friction disc and hub and the connection of the hub with the machine shaft (e.g. motor shaft)
ensure that the torque generated by the spring-applied brake (brake torque) is reliably transmitted to the
machine (motor). Explosion-protected spring-applied single-disc brakes are characterized by the fact that all
components that may ignite explosive mixtures are placed in an enclosure. This enclosure is designed to
withstand the specified test pressure in case the mixture explodes inside the enclosure. It also ensures that
mixtures outside the enclosure are not affected by the explosion.
2.2 Brake design
The solenoid housing (1.1) of the spring-applied single-disc brake accommodates the firmly fitted field coil
(1.2) with wire leads. The wire leads are connected to the terminal block (19) inside the junction box (25). The
flange (3) and friction plate (33) are screwed to the solenoid housing (1.1) by means of socket head cap screws
(22). The solenoid housing (1.1) is pressure-sealed by a cover (7) that is attached with socket head cap screws
(20). Owing to the spring force generated by the compression springs (4 & 35), the friction disc (5) is pressed
over the armature (2) against the friction plate (33) and flange (3) to generate the braking effect of the spring-
applied brake. The friction disc (5) and hub (17), which form the rotating part of the spring-applied brake, are
connected with the shaft to be braked. The friction disc (5) features a square socket and can be moved on the
hub (17) in axial direction. Spacer sleeves (6) are provided to adjust the air gap 's'. The customer-specific
connecting cable can be introduced into the junction box (25) through a cable gland (30) (M20x1.5). When AC
voltage is applied to the built-in bridge rectifier of the spring-applied single-disc brake, the force of the
electromagnetic field thus generated counteracts the spring force. The armature (2) is released and the braking
action is neutralized. The shaft to be braked is not exposed to any axial force by the brake. The spring-applied
single-disc brake is equipped with a redundant thermoswitch system (2x2 thermoswitches) (11 & 12) and with
a microswitch (13)1). The microswitch (13) is provided to prevent machine (e.g. motor) start-up before the brake
has been released. The four (2x2) thermoswitches (11 & 12) are connected in series with the microswitch (13).
They interrupt the control circuit of the machine (e.g. motor) as soon as the maximum permitted brake
temperature is exceeded. When using brakes with hand release (29), openings must be provided in the part
enclosing the brake (e.g. fan cover) so that the hand release can be installed. The hand release (29)2) allows
the brake to be released manually (e.g. in case of power failure).
1) Brake types with microswitch.
2) Brake types with hand release.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 8 of 34
List of reference numerals in Fig. 9/1:
1.1 Solenoid housing 13.3 Angle 25 Junction box
1.2 Field coil 13.4 Countersunk screw 26 Cover
2 Armature 13.5 Plate 27 Socket head cap screw
3 Flange 13.6 Socket head cap screw 28 Spring washer
4 Compression spring 13.7 Connecting cable (microswitch) 29 Hand release
5 Friction disc 14 Circlip (outer ring) 29.1 Cam
6 Spacer sleeve 15 Circlip (inner ring) 30 Cable gland
7 Cover 16 O-ring 30.1 Cap nut
8 Mounting surface 17 Hub 30.2 Connector sleeve
9 Flat seal 18 Deep groove ball bearing 30.3 Sealing ring
10 Mounting screw 19 Terminal block 31 Locknut
11 Thermoswitch (x2) 20 Socket head cap screw 32 Socket head cap screw
12 Thermoswitch (x2) 21 Spring washer 33 Friction plate
13 Microswitch 22 Socket head cap screw 34 Rating plate
13.1 Locknut 23 Spring washer 35 Compression spring
13.2 Set screw 24 O-ring 36 Duct
Table 8/1: List of reference numerals for spring-applied single-disc brake

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 9 of 34
Fig. 9/1: Spring-applied single-disc brake 76 26G..B00
Rated air gap

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 10 of 34
3. Installation
3.1 Mechanical installation
Slip the hub (17) of the spring-applied single-disc brake on a shaft (tolerance
h6) provided with a feather key to DIN 6885, sheet 1. As the hub (17) is firmly
fitted to the brake, it need not be axially secured on the machine shaft (e.g.
motor shaft). Ensure that no radial forces act on the deep groove ball bearing
(18) during installation and operation (vertical installation, if possible) and that
the hub (17) is not exposed to any permanent axial force (e.g. exerted by shaft
shoulder) after installation has been completed. The spring-applied brake is
centred through the deep groove ball bearing (18) of the hub (17). Mounting
screws (10) are provided to attach the spring-applied single-disc brake to the
mounting surface (8) of the machine (e.g. motor). Before starting installation
work, insert the O-ring (16) into the groove provided in the solenoid housing
(1.1). Tighten the mounting screws (10) evenly in several steps and make
sure not to exceed the specified tightening torque (see Table 10/1).
Note!
Ensure that the deep groove ball bearing (18) is not distorted during
installation of the spring-applied single-disc brake and that the shaft rotates easily when the brake is released.
Check that there are no grinding sounds.
Size
10
11
13
16
19
24
L [mm] 70 70 90 90 100 100
MA[Nm] 9.7 9.7 24 24 45 45
Table 10/1: Hub (17) dimensions; tightening torques for mounting screws (10)
Check that the mounting surface (8) meets the following requirements before installing the brake:
•Axial runout relative to the shaft end to EN 50347
(measuring radius = hole circle)
•Material: steel, aluminium, cast iron – with excellent thermal conductivity
•Absence of oil and grease
Radial runout of the shaft end relative to the mounting surface (8) to EN 50347
Attention!
The specified axial runout of the mounting surface (8) relative to the shaft end and the specified radial runout
of the shaft end must be strictly observed in order not to reduce the reliability and service life of the spring-
applied single-disc brake. Before installing the brake, the shaft end must be slightly brushed with a high-
temperature grease (e.g. Copaslip). This is essential to facilitate brake removal if maintenance work needs to
be carried out at a later date.
Attention!
The MAtightening torque specified for the mounting screws (10) must be strictly observed. Tighten the
mounting screws (10) evenly in several steps.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 11 of 34
3.2 Installation of the hand release (29) (brake types with hand release)
Insert the hand release handle (29) into the square socket of the two cams (29.1) that are firmly fitted to the
circumference of the solenoid housing (1.1). Ensure that the handle is correctly positioned. The mechanical
release forces F and the maximum permissible release forces (actuation forces) Fmax are specified in
Table 11/1.
Note!
Machinery-specific regulations and requirements (e.g. for hoists, cranes and elevators) must be observed
when using brakes with hand release (29). The hand release (29) must not be used to release (open) the brake
during normal operation.
Caution!
The brake torque can be neutralized manually by means of the hand release (29). Consequently, the brake
must be installed in such a way that any unintentional actuation of the hand release (29) is excluded and
reliable brake operation is ensured.
Size
10
11
13
16
19
24
Release force F [N] approx. 18 approx. 35 approx. 45 approx. 90 approx. 85 approx. 170
Max. permissible release force Fmax [N] 50 50 125 125 240 240
Table 11/1: Release force F, max. permissible release force Fmax of hand release (29)
Warning!
Check that the mechanical hand release (29) is in a central position (see Fig. 9/1) when not in use. This is
crucial to ensure reliable brake engagement. Otherwise, the full braking effect of the spring-applied single-disc
brake may not be reached. In this case, the machine (e.g. motor) must be stopped immediately and must not
be restarted until correct operation of the hand release (29) and automatic return of the release handle in its
central position (see Fig. 9/1) has been ensured.
3.3 Electrical connection and operation
Connect the spring-
applied brake to an AC
power source via
terminals 1 (BA1) and 2
(BA2) of the terminal
block (19) (see Fig. 11/2).
Connect the customer-
specific connecting cable
to the terminal block (19)
by means of a cable
gland (30) (M20x1.5). Remove the cover (26) of the
junction box (25) so that the individual strands of the
connecting cable can be connected to the terminal block
(19). The connector sleeve (30.2) of the cable gland (30)
is firmly screwed to the solenoid housing (1.1) when
delivered (see Fig. 11/1, MA= 12 Nm). Tighten the cap nut
(30.1) to a tightening torque of MA= 12 Nm to seal, clamp
(clamping range 7…13 mm) and strain-relieve the
customer-specific connecting cable. After completion of
these steps, reinstall the cover (26) of the junction box
(25).
Fig. 11/1
Fig. 11/2
Terminal block
contact assignment
Safety switches
Microswitch (13)
Bridge
Brake
Bridge
rectifier
Thermo-
switch (11)
Thermo-
switch (12)

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 12 of 34
Attention!
When fixing the cover (26) to the junction box (25), the MAtightening torques for the socket head cap screws
specified in Table 15/1 must be strictly observed. The flat seal (9) and spring washer (28) must be installed as
shown in Fig. 9/1.
The input voltage is rectified by the built-in bridge rectifier. Depending on the brake size and torque, voltage
ripple due to intermittent power supply may cause humming or incorrect operation. Perfect operation must be
ensured by the user or system manufacturer by providing suitable electrical controls.
3.3.1 AC power supply
Direct brake connection to an AC power source is only possible if a rectifier is used. Wiring of the brake in
case of single-phase AC power supply must be performed in the same way as with three-phase voltage. The
coupling times vary depending on the switching type (DC side switching or AC side switching).
Bridge rectification:
Bridge rectifiers provide voltage with minimum residual ripple. This means that brake humming can be avoided
even if small size brakes are used. In case of bridge rectification, the U2coil voltage is lower by factor 0.89
than the rectifier input voltage.
AC side switching:
In case of AC side switching, the switching contact for the spring-applied single-disc brake is provided on the
AC voltage side directly before the bridge rectifier. It must be considered, however, that the bridge rectifier with
its free-wheel diode may extend the coupling time significantly (by factor 5 or over) after AC voltage has been
removed. The disconnection times remain unchanged.
DC side switching:
In case of DC side brake switching, an auxiliary contact is provided on the brake contactor, for example. This
auxiliary contact is designed to interrupt the power supply on the DC side. The bridge on the terminal block
(19) (see Fig. 11/2) must be replaced by the auxiliary contact. In case of DC side switching, AC side switching
is also required.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 13 of 34
DC side switching
AC side switching
2
3
4
6
5
-~ ~ +
N
M
3~
L
1
L
2
L
3
U
Fig. 13/1: Suggested wiring of brake and safety switches (circuit diagram)
-~ ~ +
N
M
3~
2
1
4
3
5
L
1
L
2
L
3
Built-in rectifier Brake field coil (1.2)
Control relay for brake Safety switches
(microswitch contacts (only brake
types with microswitch (13) and
thermoswitches (11 & 12))
Control relay for machine (e.g. motor) Built-in bridge rectifier with DC side
disconnection
1
3
4
5
6
2

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 14 of 34
Attention!
To avoid damage (e.g. burns or fusing of contacts) to the external circuitry in case of DC side brake switching,
additional protection elements (e.g. varistors, spark arresters, etc.) are necessary.
Warning!
Work on the brake must only be carried out by suitably qualified personnel. Make sure that no voltage is applied
during brake connection. The specifications on the rating plate and the information provided in the circuit
diagram in the terminal box or in the operating instructions must be strictly observed.
Warning!
The brake is a DC operated system. Permanent voltage variations on the power source of the electromagnetic
brake must be limited to +/-10% of the rated voltage.
The following checks must be carried out when connecting the brake:
•Check that the connecting cables are suitable for the intended use and for the voltage and amperage of
the brake.
•Check that the connecting cables are secured with screws, clamps or other suitable fixtures to avoid
interruptions in the power supply.
•Check that the connecting cables are long enough for the intended use and that suitable torsion, strain
and shear relief features as well as bending protections are provided.
•Check that the PE conductor (only for protection class I) is connected to the earthing point.
•Check that no foreign matter, dirt or humidity is trapped inside the terminal box.
•Check that unused cable entries and the terminal box are suitably sealed to ensure compliance with the
protection class requirements to EN 60529.
3.3.2 Microswitch (13) and thermoswitch (11 & 12) connection
The four (2x2) thermoswitches (11 & 12) and the microswitch (13) provided to control the release status of the
spring-applied single-disc brake are factory-connected in series. These safety switches (microswitch (13) and
thermoswitches (11 & 12)) must be tied into the control circuit of the machine (e.g. motor) (see Fig. 13/1). This
is necessary to ensure that the microswitch (13) prevents machine (e.g. motor) start-up before the brake has
been released. The four (2x2) thermoswitches (11 & 12) connected in series with the microswitch (13) interrupt
the control circuit of the machine (e.g. motor) as soon as the temperature measured at the individual measuring
points of the thermoswitches (field coil (1.2) and flange (3)) exceeds the maximum permitted temperature. The
cover (26) of the junction box (25) must be removed to allow the connecting cable of the safety switches
(microswitch (13) and thermoswitches (11 & 12)) to be installed. The customer-specific connecting cable for
the safety switches can be introduced into the junction box (25) of the spring-applied single-disc brake through
the cable gland (30) (M20x1.5) provided (see Section 3.3). The cable strands must be connected to terminals
5 (TB1) and 6 (TB2) of the terminal block (19) (see Section 3.3, Fig. 11/2). After completion of these steps,
reinstall the cover (26) of the junction box (25).
Attention!
When fixing the cover (26) to the junction box (25), the MAtightening torques for the socket head cap screws
(27) specified in Table 15/1 must be strictly observed.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 15 of 34
Size
10
11
13
16
19
24
MA tightening torque [Nm] for socket head cap screws
(20) of cover (7) 5.6 5.6 24 24 45 45
MA tightening torque [Nm] for socket head cap screws
(22) of flange (3) 7.6 7.6 9.7 9.7 24 24
MA tightening torque [Nm] for socket head cap screws
(27) of junction box (25) cover (26) 3 3 3 3 3 3
Table 15/1: Tightening torques for socket head cap screws
Note!
Machinery-specific regulations and requirements (e.g. for hoists, cranes and elevators) must be observed
when using brakes with microswitches (13).
Warning!
The motor circuitry must be protected in such a way that no unintentional motor start-up can occur when the
microswitch (13) contact closes.
Note!
The suggested brake wiring solution with microswitch (13) shown in Fig. 13/1 is based on the general
recommendations for wiring electromagnetic components in electrical machinery (e.g. motors) without load
torque impact. When the brake is used for applications during which a load torque is generated, the system
user is responsible to ensure correct and safe wiring of the microswitch (13) and spring-applied single-disc
brake.
3.4 Electromagnetic compatibility
As required by the German Electromagnetic Compatibility Act (EMVG), electromagnetic compatibility is
essential to ensure immunity to external electromagnetic fields and conducted interference. Furthermore, the
emission of electromagnetic fields and line-conducted interference during brake operation must be minimized.
Since the brake features depend on the circuitry and operation, a declaration of conformity with the applicable
EMC standard can only be furnished for the wiring type, but not for a specific brake. The spring-applied single-
disc brakes in the 76 ..G..B00 series are designed for industrial applications to which the following EMC
standards apply: Generic Immunity Standard EN 61000-6-2 and Generic Emission Standard EN 61000-6-3 /
EN 61000-6-4. Other applications may be subject to different generic standards which must be considered by
the manufacturer of the overall system. The requirements in terms of electromagnetic compatibility of devices
and components are determined by basic standards derived from the generic standards. Wiring
recommendations will be provided in the following sections to ensure compliance with the individual basic
standards that are relevant for industrial use and other applications. Please refer to the specification sheets
for additional information on electromagnetic compatibility, especially with respect to the recommended
electronic rectifiers specified in Section 3.3.
Immunity according to EN 61000-4:
EN 61000-4-2 Electrostatic discharge:
The spring-applied single-disc brakes 76 ..G..B00 comply at least with severity level 3 without requiring
additional measures. The built-in rectifier conforms to severity level 3 without additional measures.
EN 61000-4-3 Electromagnetic fields:
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 16 of 34
EN 61000-4-4 Fast transients (burst):
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.
EN 61000-4-5 Surge:
The brakes comply at least with severity level 3 without requiring additional measures. The built-in rectifier
conforms to severity level 3 without additional measures.
EN 61000-4-9 Pulse magnetic fields, EN 61000-4-10 Damped oscillatory magnetic fields:
Since the operating magnetic fields of the electromagnetic brakes are stronger many times over than
interference fields, the brake function will remain unaffected. The brakes comply at least with severity level 4.
The built-in rectifier conforms to severity level 3 without additional measures.
EN 61000-4-11 Voltage dips, short interruptions, and short supply voltage variations:
a) Voltage interruptions:
Brakes that comply with the requirements of DIN VDE 0580 are de-energized after the specified switching
times at the latest. The switching time depends on the control and mains conditions (e.g. generator effect
of running down motors). Voltage interruptions of shorter duration than the response delay specified by
DIN VDE 0580 will not cause any malfunctions. The user must ensure that any consequential damage is
avoided (e.g. motor start-up before the brake has been released caused by phase failure in the case of
two-phase energized motors or by the slipping of an electromagnetically engaged system due to torque
drop). The functional reliability of the electromagnetic component and its electronic accessories remains
unaffected if the aforementioned consequential damage is avoided.
b) Voltage dips and short supply voltage variations:
Electromagnetically released systems:
Voltage dips and supply voltage variations to below 60% of the rated voltage and lasting longer than the
response delay specified by DIN VDE 0580 may cause the brake to be de-energized temporarily.
Consequential damage as described under a) above must be avoided by the user by taking adequate
precautions.
Electromagnetically engaged systems:
Voltage dips and supply voltage variations to below the minimum tolerance threshold will cause torque
reductions. The user is required to take adequate precautions to avoid consequential damage.
Radio interference suppression in accordance with EN 55011:
The brakes and the built-in electronic rectifier are classified as Group 1 equipment in accordance with
EN 55011. As far as the emissions from this equipment are concerned, one distinguishes between field guided
radiated interference and line-conducted interference.
a) Radiated interference:
When operated with DC voltage or rectified 50/60 Hz AC voltage, all brakes comply with the limit values
applicable to Class B equipment.
b) Conducted interference:
If the brakes are connected to a 50/60 Hz AC power source, no additional interference suppression
measures are required to ensure compliance with the limit values applicable to Class A equipment as the
built-in rectifier is equipped with interference suppression components. Interference caused during
switching operations of the electromagnetic component is generally attributable to the inductive load.
Where necessary, assemblies designed to limit the disconnection voltage (e.g. anti-parallel diode) or
voltage limiting components (e.g. varistors, suppressor diodes, resistance diodes and the like) can be
installed. However, such components will inevitably change the switching times of the brake and increase
the generated noise level. The built-in rectifier is equipped with free-wheel diodes and/or varistors to limit
the disconnection voltage.
If the brake is used in connection with other electronic accessories, the user is responsible to ensure
compliance with EMC requirements. Compliance with applicable standards concerning the design and
operation of components, sub-assemblies or equipment employed shall not relieve the user and manufacturer
of the overall system from their obligation to furnish proof of conformity of the overall system with such
standards.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 17 of 34
3.5 Set-up and start-up
Warning!
Functional testing of the brake must not be performed unless the machine (e.g. motor) has been switched off
and secured against accidental or unintentional start-up.
The following checks must be carried out:
Check compliance with the specifications provided on the rating plate with respect to the mounting position
and protection class. Provided that the mounting surface (mounting side) (8) for the spring-applied single-disc
brake is closed, no further measures need to be taken to ensure compliance with the required protection class.
If the mounting surface (mounting side) (8) is open, adequate sealing must be provided in accordance with the
installation procedure E76 00A0030 000 recommended by Kendrion. This can also be accomplished by using
a sealing device available from Kendrion. In this case, the maximum possible protection rating is IP 56. After
connection of the brake, a functional test must be performed to check that the friction disc (5) moves smoothly.
For this purpose, turn the shaft while the brake is energized and the machine (e.g. motor) is unpowered. After
completion of mounting, all necessary covers and guards must be installed.
Specifications on rating plate (order-specific, example brake type 76 26G11B00):
Zone 1: occasional explosion hazard
Zone 2: occasional explosion hazard for short periods
Zone 21: occasional explosion hazard caused by combustible dust in normal operation
Zone 22: explosion hazard caused by combustible dust unlikely to occur in normal operation; if it does
only for short periods
Note: The product number of the spring-applied single-disc brake consists of the type number
followed by the version number, e.g. 76 26G11B00-0001.
Certification codes:
(to IEC/EN 60079-0)
II 2G group II equipment; category
2G (gas atmospheres);
zones 1 and 2
II 2D group II equipment; category
2D (combustible dust atmos-
pheres); zones 21 and 22
IIlC group lll equipment;
C, conductive dust
IP67 T95°C IP 67 protection; max. surface
temperature 95°C
Ex db eb IIC T5 flameproof enclosure;
increased safety;
group II equipment (electrical
equipment for use in poten-
tially explosive atmospheres
except for underground
mines); classification C (gas
and vapour atmospheres);
temperature class T5 vapour
atmospheres); temperature
class T5
tb equipment dust ignition
protection by enclosure “t”;
enclosure protection
Db equipment protection level
(EPL): Db
IECEx BVS… IECEx Scheme number
DMT 02 notified body and certification
year
ATEX E 122 X certification number
Voltage frequency
Order number
(product number per order)
Type number
Version number (4-digit)
Max. switching power
Rated torque
Rated current
Offer drawing index
CE ident. no.
Manufacturing date
and inspector ID
Certification code
optional, see specific order
IECEx Scheme
EC type-examination
certificate
Rated voltage

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 18 of 34
Warning!
Before starting the machine (e.g. motor) test run without driven components, the feather key (if used) must be
secured in such a way that it cannot be hurled out. Ensure that the shaft is not exposed to load torques. Before
the machine is re-started, the brake must be de-energized.
Caution!
The brake surface temperature may reach up to 95°C. Heat-sensitive parts such as conventional cables or
electronic components must not be fixed to or be in contact with these surfaces. If necessary, suitable
protections and hand guards must be installed to avoid accidental contact with hot surfaces! If the shaft needs
to be turned during set-up operations while the machine (e.g. motor) is switched off, the brake must be released
electromagnetically or by means of the hand release (29).
Attention!
High-voltage tests performed during brake installation within an overall system or during start-up must be
carried out in such a way that damage to the built-in electronic accessories is avoided. The limits for high-
voltage tests and follow-up tests specified by DIN VDE 0580 must be observed.
Attention!
Check that the brake has been connected in accordance with the specifications provided on the rating plate
before it is put into operation. Even short-term operation outside the specified supply voltage limits may cause
irreversible damage to the brake or electronic accessories. Such damage may not be apparent immediately.
DC side brake switching without protective circuit as described in Section 3.4 will cause damage to electronic
rectifiers, electronic accessories, switching contacts and to the field coil (1.2).
3.6 M2rated torque adjustments
The brakes are factory-adjusted to the M2rated torque (as specified
in the purchase order). The factory-adjusted M2rated torque is
specified on the rating plate (33) of the brake. In case fine
adjustment is required, the M2rated torque can be continuously
reduced. However, increasing the M2rated torque is not allowed.
In order to adjust the torque, proceed as follows: Loosen the socket
head cap screws (20) provided on the cover (7) and remove the
cover (7). Screw in the socket head cap screw (32) clockwise by
means of a screwdriver, making sure to secure the nut (31) in such
a way that it cannot turn. Fine adjustment must be carried out by tightening the socket head cap screws (32)
evenly in several steps. Check that the requirements in terms of the minimum length of projection xmin (see
Table 18/1) of the socket head cap screw (32) from the flange (3) are met. The change in the M2rated torque
resulting from these adjustments is specified in Table 18/1. The factory-set nominal value (approximate value)
of the length of projection xnom (see Table 18/1) is marked on the flange.
Size
10
11
13
16
19
24
∆M2/mm [Nm] 0.5 0.65 4 7.5 7.5 10
xnom [mm] 10.5 10.5 11.5 11 11 11
xmin [mm] 7.5 7.5 9 9 9 9
Table 18/1: Change in the M2rated torque from 1 mm axial adjustment of the socket head cap screw (32);
minimum permissible projection xmin

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 19 of 34
Warning!
Any adjustment of the rated torque must be performed by the manufacturer or by authorized specialist
personnel.
4. Maintenance
4.1 Checks and service
The spring-applied single-disc brake does not require any particular maintenance except that the friction disc
(5) must be replaced when worn (see “Technical specifications” for information on the maximum air gap smax)
and that the safety switches (microswitch (13)3) and thermoswitches (11 & 12) need to be checked. These
service and maintenance measures must be performed during the general inspection of the electric machine
(e.g. motor). Make sure that the spring-applied brake is unpowered and that the explosion protection is not
interfered with when carrying out service and maintenance work. When opening the flameproof enclosed
solenoid housing (1.1) to replace the friction disc (5), for example, the safety information provided in this
manual must be strictly observed. Always check that the flameproof gaps are in perfect condition. Do not use
spare parts other than original spares supplied by the manufacturer of the spring-applied brake.
Caution!
Before you perform repair work on components which form flameproof gaps, consult the brake manufacturer
for information on the gap dimensions. This is crucial because the dimensions of the flameproof gaps of the
brake described in this manual may have to be longer and the gap widths may have to be narrower than those
specified in Table 2 (3) of EN 60079-1:2014.
Warning!
In case the explosion protection features of the spring-applied brake are damaged during maintenance or
repair work, the brake must be checked by an authorized expert before it can be reused. Any measures
required to restore explosion protection must be performed by the manufacturer or by specialist repair shops
(see Section 13).
Brake removal from the machine (e.g. motor):
Loosen the socket head cap screws (27) provided on the cover (26) of the junction box (25) and remove the
cover (26). Disconnect the strands of the connecting cables (field coil (1.2) and safety switches) from the
terminal block (19). Unscrew the cap nut (30.1) of the cable gland (30) and remove the connecting cables from
the junction box (25). Loosen the mounting screws (10). Remove the brake from the shaft with the two pull-off
threads provided on the solenoid housing (1.1) and by means of socket head cap screws (e.g. to ISO 4762).
Checking the air gap 's':
Loosen the socket head cap screws (20) provided on the cover (7) and remove the cover (7). Place a
measuring bridge with dial gauge on the flange (3) to measure the air gap 's'. Position the measuring tip of the
micrometer screw on the friction disc (5).
Release the spring-applied brake so that the air gap 's' can be determined from the difference between the
values indicated by the dial gauge.
Attention!
Temporary electric release of the spring-applied brake is required to allow the air gap 's' to be measured. For
information on the electrical connection of the brake to the power source, please refer to Section 3.3.
3) Brake types with microswitch.

Operating Instructions BA 76..G..B00 // Last updated: 13/03/2020 // Page 20 of 34
Friction disc (5) replacement:
Remove the self-locking nut (31) from the socket head cap screws (32). Loosen the socket head cap screws
(22) provided on the flange (3) and remove the flange (3). Remove the friction disc (5) from the hub (17) and
replace it by a new one.
Attention!
Ensure that the connections of the four thermoswitches (11 & 12) are not damaged or loosened when removing
the flange (3).
Deep groove ball bearing (18):
When performing maintenance and repair work, check that the deep groove ball bearing (18) rotates smoothly.
If the bearing (18) needs to be replaced, follow the instructions on how to remove the brake from the machine
(e.g. motor) and on how to open the solenoid housing (1.1). After having removed the friction disc (5), remove
the circlips (14 & 15). Push the hub (17) and deep groove ball bearing (18) out of the solenoid housing (1.1)
and remove the bearing (18) from the hub (17). Before reassembling the spring-applied brake, all components
(except for the friction disc (5)) must be cleaned with grease-free cleaners. In order to assemble the individual
components, proceed in reverse order of removal. When fine adjusting the M2rated torque, make sure that
the socket head cap screws (32) project from the flange (3) by the length xnom (approximate value – see
Table 18/1). The self-locking nuts (31) (to ISO 10511-04-A2F; 140°C) must be replaced before adjusting the
screws.
Attention!
When the spring-applied single-disc brake is mounted to the machine, it is crucial that the mounting screws
(10) be tightened applying the MAtightening torque specified in Table 10/1. The socket head cap screws (20)
on the cover (7) and the socket head cap screws (22) must be tightened to the MAtorque specified in
Table 15/1. The O-ring (24), spring washer (21 & 28) and flat seal (9) must be installed as shown in Fig. 9/1.
Attention!
Depending on its operating condition, it may no longer be possible to release the spring-applied single-disc
brake when the maximum air gap smax (see Table 30/1) has been exceeded. In this case, the braking action
cannot be neutralized.
Warning!
If a hand release (29) is fitted to the brake and the maximum air gap smax (see Table 30/1) has been exceeded
(especially in case of a reduced M2rated torque), the hand release (29) may limit the axial movement of the
armature (2). This would cause the torque to be reduced down to zero. Whenever carrying out service and
maintenance work, check the degree of wear of the friction disc (5) and the air gap 's' and replace the friction
disc well before the maximum air gap smax (see Table 30/1) is reached.