SEW EURODRIVE DFY/DFS Synchronous Motor Guide

Brake does not brake, brake lining is worn, replace the entire brake disc

Brake delay action: The brake is cut off on both the AC side and the DC and AC sides (see wiring diagram)

Brake noise caused by gear wear due to start-up impact and torque oscillation due to improper controller settings. Check the drive configuration; Adjust the controller according to the instruction manual

If you need to contact SEW customer service, please provide: nameplate data of the motor and servo controller, description of the fault phenomenon, occurrence time and background, and possible causes.

Appendix Technical Data Summary

8.1 Brake Technical Data (Table 3)

Motor model: Maximum/minimum braking torque (Nm), total power W (10 ⁶ J), holding current IH (230VAC) (A), starting current IB (24VDC) (A)

DFS56M/B 2.5 / — — — 0.56

DFY71M/B 10 / 6 600 0.15 1.0

DFY90M/B 30 / 12 900 0.23 1.5

DFY112ML/B 60 / 35 1800 0.35 2.15

8.2 Brake coil resistance (Table 5)

Motor model 230VAC RB (Ω) 24VDC RB (Ω)

DFS56..B — 59

DFY71..B 1593 3.6

DFY90..B 402 2.5

DFY112..B 301 1.8

8.3 Connector Stripping Length (Appendix Table 1)

Connector type Maximum outer diameter (mm) Stripping length A (mm)

SM11 (DFS56) — 6 ± 0.5

SM21 (DFY71) 13.5 7 ± 0.5

SM32 (DFY90) 20 11 ± 0.5

SM46 (DFY112) 28 —