SEW-Eurodrive DFY 112L/B User Manual

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14/004/92

T

DFS/DFY Synchronous

Motors

Operating Instructions

Edition 02/2000

0919 9519 / 0200

Table of Contents

Questions and Answers:

D
Deborah RiveraAug 15, 2025
Why does my SEW-Eurodrive Engine motor overheat?
- J
  Jonathan Torres Jr.Aug 15, 2025
  Your SEW-Eurodrive Engine motor may overheat due to several reasons: * Overload: Check the load with the controller current and configuration data. * Inadequate cooling: Adjust the cooling air supply or clear any blockages. Consider fitting a forced cooling fan. * Forced cooling fan not operating: Check the fan's connection and correct it if necessary. * Ambient temperature too high: Reduce the power. * Selected duty exceeded: Match the motor duty to the required operating conditions. Expert advice is recommended for selecting the correct drive. * Servo controller not optimized: Check the servo controller.
L
Lance JonesAug 18, 2025
What to do if my SEW-Eurodrive DFY 112L/B Engine motor will not start?
- I
  iwigginsAug 18, 2025
  If your SEW-Eurodrive Engine motor won't start, here are a few things to check: * **Lead broken**: Check and restore the connections. * **Fuse blown**: Check the servo controller and replace the fuse. * **Circuit-breaker tripped**: Check the circuit-breaker, adjust if necessary, and check the drive for possible overload. * **Servo controller defective, connected incorrectly, or set incorrectly**: Check the servo controller and wiring.
N
Nicholas HernandezAug 21, 2025
Why is my SEW-Eurodrive Engine brake not releasing?
- M
  mtaylorAug 21, 2025
  The brake on your SEW-Eurodrive Engine might not be releasing due to the following reasons: * Wrong voltage at the brake: Apply the correct voltage (see nameplate). * Brake control unit failed: Replace the brake control unit, check the brake coil, the switching devices, and the connection. * Brake connected incorrectly: Check the brake connection. * Max. permissible working air gap exceeded due to worn brake lining: Replace the whole brake disc. * Voltage drop on the supply lead > 10 %: Ensure the correct supply voltage is connected and check the lead cross-sections. * Brake coil interturn fault or short circuit to frame: Change the complete brake with control unit and check the switching devices.
G
George NormanAug 25, 2025
Why is my SEW-Eurodrive DFY 112L/B motor too noisy?
- T
  Tammy EspinozaAug 25, 2025
  Excessive noise from your SEW-Eurodrive Engine motor can be caused by: * Ball bearings distorted or damaged: Re-align the motor, check the driven machine, and replace the ball bearings. * Rotating parts vibrate: Rectify the cause or correct the imbalance. * Forced cooling fan: foreign matter in the cooling air passages: Clean the cooling air passages.
N
nicholas74Aug 28, 2025
What causes a SEW-Eurodrive DFY 112L/B brake to operate after a delay?
- E
  Emily GrossAug 28, 2025
  A delayed brake operation in your SEW-Eurodrive Engine is caused by the brake being switched in the AC circuit. To resolve this, ensure simultaneous switch-off in the DC and AC circuits, referring to the wiring diagram.
L
Lindsey NunezAug 31, 2025
Why is my SEW-Eurodrive DFY 112L/B Engine brake noisy?
- M
  Misty WhiteSep 1, 2025
  Brake noise in your SEW-Eurodrive Engine can be attributed to: * Worn gearing due to jerky starting: Check drive configuration. * Oscillating torques due to incorrect servo controller setting: Check/correct servo controller setting in accordance with the Installation and Operating Instructions.
J
Jackie JensenSep 4, 2025
Why is the SEW-Eurodrive DFY 112L/B Engine rotation direction wrong?
- J
  Jeffrey ProctorSep 4, 2025
  An incorrect rotation direction in your SEW-Eurodrive Engine is caused by incorrect motor control. Check the servo controller and setpoints, and change over setpoint leads.
E
Emma WilkinsSep 7, 2025
What causes a SEW-Eurodrive DFY 112L/B Engine brake to not brake?
- V
  Virginia SmithSep 7, 2025
  If the brake in your SEW-Eurodrive Engine is not braking, it could be due to: * Worn braking lining: Change the whole brake disc. * Manual brake release incorrectly set: Adjust the setting nuts. * Braking torque incorrect: Change the braking torque.
A
Amy LeeSep 10, 2025
Why does my SEW-Eurodrive DFY 112L/B Engine motor hum?
- A
  Allison RobertsonSep 10, 2025
  A humming sound in your SEW-Eurodrive Engine motor could indicate: * Drive blocking: Check the drive. * Fault on resolver lead: Check the resolver lead. * Brake cannot be released: Check the brake. * Servo controller not set correctly: Check servo controller.

SEW-Eurodrive DFY 112L/B Specifications

General

Brand	SEW-Eurodrive
Model	DFY 112L/B
Category	Engine
Language	English

Summary

Safety Notes

Safety Instructions

Installation and Assembly

Installing the Motor

Guidelines for mounting the motor securely and safely.

Electrical Connection

EMC-Compliant Wiring

Connecting the Motor

Instructions for connecting the motor power and signal leads.

DFS56 Motors with Terminal Boxes

Wiring diagram and connection details for DFS56 motors with terminal boxes.

DFY71...DFY112 Motors with Terminal Box

Wiring diagram and connection details for DFY71-112 motors with terminal boxes.

Motors with Plug Connector

Pin assignment and connection procedures for motors using plug connectors.

Resolver / TF/TH

Connecting the Brake

Procedures for connecting the motor's brake system.

DFS 56 .. B Brake

Specifics for connecting the brake on DFS 56..B brake motors.

DFY 71 - 112 .. B Brake

Connection of brake rectifiers (BME, BMH, BMP) or BSG unit for DFY 71-112.

Connecting the Accessories

Guidance on connecting various motor accessories.

AV1Y Absolute Angle Encoder

Startup

Startup

Inspection and Maintenance

Inspection and Maintenance Periods

Inspection/Maintenance Brake

DFY 56 .. B Brake

DFY 71 ... DFY 112 .. B Brake

Brake Motors with AV1Y Absolute Encoder

Retrofitting the Brake DFY71...DFY112

Preparing the Motor

Preassembly of the Brake Coil

Preassembly of the Brake

Mounting the Brake to the Motor

Mounting the Manual Brake Release

Electrical Connection

Trouble Shooting

Problems with the Motor

Diagnosing and resolving issues related to motor operation.

Brake Problems

Troubleshooting common problems encountered with the motor brake.

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