Electrically Released Motor Brake
Module for EM-MBFB and EUM-MBFB
P-1337
819-0314
Installation Instructions
Warner Electric’s MBFB series of Electrically Released Brake Modules are designed for brake
only applications when mounted to the back of a NEMA C-face double shaft motor.
The fail safe brake engages when power goes off.
Model Part No.
EM 210-20MBFB-56 5371-169-030
EM 210-20MBFB-56, 24V 5371-169-033
EM 210-7/8-20MBFB-56 5371-169-072
EUM 210 7/8-20MBFB-32 5371-169-064
EUM 210 7/8-20MBFB-56 5371-169-068
EUM 210-20MBFB-32 5371-169-056
EUM 210-20MBFB-56 5371-169-060
Failure to follow these instructions may result
in product damage, equipment damage, and
serious or fatal injury of personnel.
If brake is to be applied with the
brake output shaft in a vertical condition
Warner Electric's application engineering
should evaluate application.
Model Configuration
EUM 210-20MBFB-32
Size Static Torque lb. ft.
The term “fail safe” describes a brake that
engages automatically when its full power is
shut off for whatever reason. The term, as
applied to brakes, designates a mode of
operation, not a guarantee of safety for the
equipment on which the brake is mounted
and for personnel who are near it.
Mounting Instructions
Step 1: Mounting the Brake to a Motor
The brake module (20) can be mounted
directly to the motor as follows:
A. Insert a key in the motor shaft keyway. Prick
punch the end of the motor shaft keyway to
prevent the key from sliding out.
B. A set collar is provided in the EM-210
mounting accessory to prevent the key from
sliding out. Slide the set collar against the
motor bearing and tighten the set screw
securely. (See Figure 1)
C. Align the motor shaft and key with the mating
shaft hole and key slot in the brake module.
D. Slide the module onto the motor shaft so the
module surface is snug against the motor face.
NOTE: Brake Module should slide freely
onto shaft and fit flush with motor c-face.
E. Secure the brake module in the motor C-face
with the four (4) long hex head capscrews.
Suggested torque for capscrews is 30-35 lb.ft.
(Figure 1)
Warner Electric • 800-825-9050 P-1337 • 819-0314
2
Step 2: Electrical Connections
24 Volt Brake recommended controls are:
The conduit hole in the motor brake is threaded
for standard pipe conduit connectors. The wiring
diagram included with each Warner Electric control
shows the proper electrical connections to be made.
Note: Controls used must have adjustable
output voltage.
Connect the red wire from the unit to the “+”
terminal of the DC supply and the black wire from
the unit to the “-” terminal of the DC supply.
Note: Refer to the brake release adjustment
process on page 4.
Control Requirements
All Permanent Magnet Type Electrically Released
Brake Modules are polarity sensitive. Therefore, the
(+) red wire must be connected to the (+) terminal
and the (-) black wire to the (-) terminal.
Potentiometer control will then provide adjustment
for the proper brake release point as described in
the “brake release” procedure.
CBC-500-24, 24-30 VAC input
part no. 6024-448-002
CBC-550-24, 120/220/240/380/480 VAC input
part no. 6024-448-005
All Permanent Magnet type
Electrically Released Brake Modules are
polarity sensitive. See the service installation
sheet included with the control for connection
information.
Burnishing and Maintenance
No burnishing required, units are pre-burnished at
factory.
As with any friction-type device, some initial
concern should be given to wear rate.
Improper voltage setting can reduce the braking
life. Once the best release voltage has been
established, precautions should be taken to
prevent machine operators, or other personnel not
familiar with wear characteristics, from changing
the potentiometer setting arbitrarily.
See the service installation instruction provided with
controls for connection information.
To reach the normal wearing components, reverse
the installation procedure for the module assembly.
Wear Pattern
90 Volt Brake recommended controls are:
Wear grooves appear on the friction surfaces. This
*CBC-160-1 120 VAC input
part no. 6013-448-001
*CBC-160-2 220-240 VAC input
part no. 6013-448-002
CBC-200 120 VAC input
part no. 6011-448-001
CBC-300 120 VAC input
part no. 6021-448-001
CBC-500-90 120 VAC input
part no. 6024-448-003
CBC-550-90 120/220/240/380/480 VAC input
part no. 6024-448-006
*These controls are for use with conduit box kit
part no. 5370-101-042. All others require other
enclosures or alternate mounting.
Warner Electric • 800-825-9050 P-1337 • 819-0314
is a normal wear condition, and does not impair
functioning of the unit. Never machine the friction
surfaces to remove grooves or score marks
resulting from normal wear.
Heat
Excessive heat and high operating temperatures
are causes of rapid wear. Units, therefore, should
be ventilated as efficiently as possible, especially if
the application requires fast, repetitive cycle
operation.
3
Foreign Materials
If units are used on machinery where fine,
abrasive dust, chips or grit are dispelled into the
atmosphere, a screen over the ventilation holes
may be necessary.
Where units are used near gearboxes or
transmissions requiring frequent lubrication, means
should be provided to protect the friction surfaces
from oil and grease to prevent serious loss of
torque.
Oil and grease accidentally reaching the friction
surfaces may be removed by wiping with a rag
dampened with a suitable cleaner, which leaves no
residue. In performing this operation, do not
drench the friction material. If the friction materials
have been saturated with oil or grease, no amount
of cleaning will be completely effective. Once such
a unit has been placed back in service, heat will
cause the oil to boil to the surface, resulting in
continued torque loss.
Brake Release Adjustment
Instructions for setting the
optimum release voltage of permanent magnet
applied/electrically released brakes.
The following procedure will result in the brake
releasing and allowing the load to be free to
move. Be sure the load is in a safe condition
before proceeding with this process.
In a permanent magnet applied/electrically
released brake, the attractive force between the
brake surfaces is created by permanent magnets.
The brake is electrically released by applying DC
power to the electro-magnetic coil in the brake
that opposes the permanent magnets. Electrically
released brakes are polarity sensitive: the positive
lead of the power supply must be connected to
the positive (red) lead of the brake, and the
negative lead of the power supply must be
connected to the negative (black) lead of the
brake. The power supply applied to the brake
must also be adjustable so that the optimum
release voltage for each individual brake can be
determined and set.
The following procedure describes
how to set the adjustable power supply to the
optimum release point of the brake. A volt-meter
is required to perform the procedure.
No power is applied to motor during this
procedure. Power normally supplied by motor
to brake control should be supplied by
alternate method.
After control is adjusted per steps below,
brake control may need to be fine tuned
(adjusted) with motor running to compensate
for any changes in supply voltage used.
1. With power off, connect the positive lead of
the power supply to the positive (red) lead of
the brake and the negative lead of the power
supply to the negative (black) lead of the
brake.
2. Connect a volt-meter to measure the voltage
applied across the brake.
3. Adjust the power supply to its lowest
possible output, then energize the power
supply only, to apply power to the brake.
4. Starting from the low point, slowly increase
the applied voltage until the brake armature
disengages from the magnet. Note and
record the applied voltage at this point.
5. Continue to slowly increase the applied
voltage until the armature re-engages the
magnet. If the maximum voltage available
from the supply does not cause the armature
to re-engage, the armature should be
manually assisted into engagement.
Note: If armature needs to be manually
assisted, armature should be pressed on
back side to make contact with friction
face of magnet.
Warner Electric • 800-825-9050 P-1337 • 819-0314
4
6. With the armature re-engaged, slowly
reduce the applied voltage until the armature
disengages from the magnet. Note and record
the applied voltage at this point.
7. The optimum release point for the brake is
half-way between the two recorded voltage
readings. Adjust the supply to this optimum
release voltage.
Note: The above procedure should be done by
visually watching the armature move and may
be repeated if necessary from Step 1 through
Step 7.
If any problems should occur during adjustments or
application questions arise, please contact Technical
Support at 1-800-825-9050 Monday through Friday
7:30 a.m. - 4:30 p.m. central time.
Notes: Visit Warner Electric’s website at
www.warnerelectric.com for dimensional
drawings, weights, inertias and a complete
offering of our products including clutches, brakes,
and clutch or brake controls and service parts.
In addition, Warner Electric module products,
controls and service parts information can be found
in our catalog P-1234-WE. Call 815-389-3771 to
request any of our catalogs.
Warner Electric • 800-825-9050 P-1337 • 819-0314
5
Warranty
Warner Electric LLC warrants that it will repair or replace (whichever it deems advisable) any
product manufactured and sold by it which proves to be defective in material or workmanship within
a period of one (1) year from the date of original purchase for consumer, commercial or industrial
use.
This warranty extends only to the original purchaser and is not transferable or assignable without
Warner Electric LLC’s prior consent.
Warranty service can be obtained in the U.S.A. by returning any defective product, transportation
charges prepaid, to the appropriate Warner Electric LLC factory. Additional warranty information
may be obtained by writing the Customer Satisfaction Department, Warner Electric LLC, 449
Gardner Street, South Beloit, Illinois 61080, or by calling 815-389-3771.
A purchase receipt or other proof of original purchase will be required before warranty service is
rendered. If found defective under the terms of this warranty, repair or replacement will be made,
without charge, together with a refund for transportation costs. If found not to be defective, you will
be notified and, with your consent, the item will be repaired or replaced and returned to you at your
expense.
This warranty covers normal use and does not cover damage or defect which results from
alteration, accident, neglect, or improper installation, operation, or maintenance.
Some states do not allow limitation on how long an implied warranty lasts, so the above limitation
may not apply to you.
Warner Electric LLC’s obligation under this warranty is limited to the repair or replacement of the
defective product and in no event shall Warner Electric LLC be liable for consequential, indirect,
or incidental damages of any kind incurred by reason of the manufacture, sale or use of any
defective product. Warner Electric LLC neither assumes nor authorizes any other person to give any
other warranty or to assume any other obligation or liability on its behalf.
WITH RESPECT TO CONSUMER USE OF THE PRODUCT, ANY IMPLIED WARRANTIES WHICH
THE CONSUMER MAY HAVE ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF
ORIGINAL CONSUMER PURCHASE. WITH RESPECT TO COMMERCIAL AND INDUSTRIAL
USES OF THE PRODUCT, THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL
OTHER WARRANTIES, WHETHER EXPRESSED OR IMPLIED BY OPERATION OF LAW OR
OTHERWISE, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and
you may also have other rights which vary from state to state.
Changes in Dimensions and Specifications
All dimensions and specifications shown in Warner Electric catalogs are subject to change without
notice. Weights do not include weight of boxing for shipment. Certified prints will be furnished
without charge on request to Warner Electric.
Warner Electric
31 Industrial Park Road • New Hartford, CT 06057
815-389-3771 • Fax: 815-389-2582
www.warnerelectric.com
P-1337 • 819-0314 8/11 Printed in USA
Loading...