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Order Number 

Nominal torque holding brake
Nominal torque standard
84 % nominal torque 

6)

68 % nominal torque 

6)

50 % nominal torque 

6)

34 % nominal torque 

6)

Nominal torque adjustable 

2) 6)

112 % nominal torque 

6)

125 % nominal torque 

6)

0
1

3
4
5
6
7
8

0
1

3
4
5

Without supplementary parts
Hand release 

1)

Friction disk 

7)

Hand release/Friction disk

 1) 7)

Flange plate 

8) 

Hand release/Flange plate 

1) 8)

__ / 8

9

1 . __

__

__ . __ /

__

/

__

/

__

Sizes 

up to 

1000

Standard brake metal rotor

3)

Holding brake metal rotor
Standard brake  
Friction lining rotor 

4)

0
1

Standard 

11)

Enclosed  
design IP65 

5)

Tacho design 

5)

Central torque 
adjustment 

2)

0

1

3

Coil voltage 

9

[VDC] 

      24 

10)

104
180
207

Bore 

Hub Ø d 

(please observe 

dimensions  

pages 4-5,  

Table 2, page 7)

Keyway acc.

DIN 6885/1 

or

 DIN 6885/3

Example: 16 / 891.11.0 / 4 / 16 / 6885/1

For Further Options, see page 10.

ROBA-stop

®

-M brakes are also available in ATEX-design  

according to the directive 94/9 EC (ATEX 95) 

(Please contact the manufacturer separately for this).

ROBA-stop

®

-M electromagnetic safety brakes

Please Observe:

According to German notation, decimal 

points in this document are represented 

with a comma (e.g. 0,5 instead of 0.5).
We reserve the right to make dimensional 

and constructional alterations.

1)  Hand release not installed on sizes 2 – 500. 
  Size 1000: hand release only available  
  as emergency hand release. 
  Hand release for IP65 design only ex works.
2) On request
3) From size 60
4)  Up to size 32 (for brake operation in hoisting 

device drives, please contact the manufacturer)

5) Not in combination with friction disk
6) See Technical Explanations pages 6 – 7

7) Sizes 2 – 60
8) Standard tacho brake flange plate 
9)  Brake operation only with overexcitation 
  on size 500 from 700 Nm onwards 
  and on size 1000.
10) Not possible on size 1000.
11)  Standard and tacho design are identical  

on size 1000.

ROBA-stop

®

-M

Page   4

Sizes  up to 1000

Braking torques

0,7 up to 1400 Nm 

(Standard brake)

4 up to 1600 Nm 

(Holding brake)

Permitted shaft diameters

8 up to 90

Type 891._11.0

Type 891._1.0 

Type 891._14.1 

Type 891._14.

 

Standard design

Page   5

Standard design with friction disk

IP65 design with flange plate

Tacho attachment design with flange plate

Short Description Installation

Page   6

Brake Dimensioning, Friction-Power Diagrams

 

Page   8

Further Options

Page 10

Switching Times, Electrical Connection, Electrical Accessories

Page 11

Guidelines

Page 19

33

Summary of Contents for ROBA-stop-M

Page 1: ...OBA stop M Electromagnetic safety brakes Fast and cost effective installation High Protection IP54 IP65 Maintenance free for the rotor lifetime your reliable partner ROBA stop Always the safest choice...

Page 2: ...d condition helical springs 6 press against the armature disk 5 The rotor 3 is held between the armature disk 5 and the corresponding mounting surface of the machine The shaft is braked via the gear h...

Page 3: ...s in this document are represented with a comma e g 0 5 instead of 0 5 We reserve the right to make dimensional and constructional alterations 1 Hand release not installed on sizes 2 500 Size 1000 han...

Page 4: ...250 500 1 2 1000 5 Holding brake 1 2 Type 891 1_ _ _ Mnom Nm 4 8 16 32 64 100 180 250 450 800 3 1600 5 Input power Pnom W 19 25 29 38 46 69 88 98 120 152 186 Maximum speed nmax rpm 6000 5000 4000 350...

Page 5: ...IN IEC 60038 10 Outer diameter friction disk free size outer diameter flange plate 0 2 Missing dimensions are identical with Type 891 011 0 see page 4 Dimensions mm Size 2 4 8 16 32 60 100 150 250 500...

Page 6: ...nal condition by replacing the rotor For this the brake must be cleaned thoroughly The wear condition of the rotor 3 is determined by measuring the release voltage this must not exceed max 90 of the n...

Page 7: ...mm 6 05 6 05 6 9 8 10 4 11 15 14 15 5 17 18 5 18 5 Table 1 Permitted Bores dmax Size 2 4 8 16 32 60 100 150 250 500 1000 dmax Type 891 0_ _ _ 2 Keyway JS9 6885 1 13 13 18 22 30 32 42 45 55 75 90 6885...

Page 8: ...tching frequency can be taken from the friction power diagrams page 9 If the friction work switching work per braking is known the max switching frequency can also be taken from the friction power dia...

Page 9: ...250 Size 150 Size 100 Size 60 Size 32 Size 16 Size 8 Size 4 Size 2 Switching frequency 1 h Diagram 2 Type 891 10_ _ Holding brake Type 891 10_ _ Holding brake for 50 of the maximum speed nmax for the...

Page 10: ...1 page 5 as part of the standard delivery A radial shaft sealing ring Item 1 is installed in the coil carrier Item 2 on continuous shafts Damping rotor gear hub If vibrations in the drive line cannot...

Page 11: ...observe the applicable directives and standards e g DIN EN 60204 1 and DIN VDE 0580 Their observance must be guaranteed and double checked Earthing Connection The brake is designed for Protection Cla...

Page 12: ...g force braking torque adjustment 100 The overexcitation time tover is double the separation time t2 on each brake size Spring force braking torque adjustment 100 The overexcitation time tover is high...

Page 13: ...controlled output voltage with variable input voltage compact design compact design no wear on contacts no wear on contacts U over 207 VDC Overexcitation voltage U over 360 VDC Overexcitation voltage...

Page 14: ...7 W 517 W 312 W 416 W 416 W 416 W Max coil capacity at 230 VAC up to 85 C 352 W 352 W 187 W 250 W 250 W 250 W Max coil capacity at 400 VAC 50 C 540 W 720 W 720 W 720 W Max coil capacity at 400 VAC up...

Page 15: ...n Terminals 1 2 Input voltage fitted protective varistor 3 4 Connection for external contact for DC side switch off 5 6 Output voltage fitted protective varistor 7 8 Rext for bridge rectifier timing a...

Page 16: ...tive measures or external components are necessary The DC side disconnection is stand ard activated terminals 3 and 4 are not wired resulting in short electromagnetic consumer switching times The inte...

Page 17: ...bridge voltage for 50 ms and then control the 90 or 180 VDC overexcitation voltages After the overexcitation period they control the 52 or 104 VDC holding voltages The overexcitation period can be adj...

Page 18: ...load Switching products with a contact opening distance of 3 mm are suitable for this purpose Electrical Connection Terminals 1 Input voltage 2 Input voltage 3 Coil 4 Coil 5 Free nc terminal 6 Free nc...

Page 19: ...must be adjusted according to the size of the brake at the place of installation The brakes are designed for a relative duty cycle of 100 The brakes are only designed for dry running The braking torqu...

Page 20: ...7 contact mayr fr Italy Mayr Italia S r l Viale Veneto 3 35020 Saonara PD Tel 0 49 8 79 10 20 Fax 0 49 8 79 10 22 info mayr italia it Singapore Mayr Transmission S PTE Ltd No 8 Boon Lay Way Unit 03 06...

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