Dunkermotoren E90R Power-Off Brake
The Dunkermotoren E90R is a spring-force power-off brake that holds a motor axis the instant supply voltage is removed, so vertical loads, positioning stages and gravity-loaded axes stay put through an emergency stop or power failure. Because the holding force comes from a spring rather than a permanent magnet, its 1Nm nominal torque (0.60–1.20N...
Read MoreThe Dunkermotoren E90R is a spring-force power-off brake that holds a motor axis the instant supply voltage is removed, so vertical loads, positioning stages and gravity-loaded axes stay put through an emergency stop or power failure. Because the holding force comes from a spring rather than a permanent magnet, its 1Nm nominal torque (0.60–1.20Nm over the temperature range) stays predictable as the motor heats up or the duty cycle changes.
In combination with Dunkermotoren's brushless motors the E90R integrates into the motor's profile housing at IP65, pairing with BG66 and BG75 motors in that configuration. Where a standalone mount is preferred, it can also be fitted openly or under a cover, connecting via 300mm grey leads (UL style 1569 AWG22) to a 24Vdc supply.
The E90R is also available with manual unlocking and with manual release; on the release version a Ø3.6mm hole in the lever takes a Bowden cable, so an operator can free a jammed axis from the front or the rear without power. Its 1Nm holding and mid-range Ø59mm body suit general-duty servo and stepper axes where a vertical load, clamp or positioning stage must not drift the moment power is lost, typical in motion control, factory automation and machine build.
It's part of Dunkermotoren's full power-off brake series, which spans the permanent-magnet E22R and E100R and the spring-force E38R, E90R, E310R and E600R for larger axes, plus the power-on E46A to E605A range for applications requiring a normally-braked default state.
All rated values apply in the run-in condition.
Show Less
Features
- Spring-force power-off design holds the load when the 24Vdc supply is removed — the axis stays put the instant power is lost
- 1Nm nominal holding (0.60–1.20Nm over temperature) — the mid-range spring-force build for general-duty axes
- Insensitive to temperature and load changes, so holding stays predictable through duty cycling and thermal swings
- Engages and releases in 30ms — balanced, unhurried timing for controlled holding and release
- Integrates with BG66 and BG75 motors inside an IP65 profile housing — or mounts open at IP20, up to IP65 with covers
- Optional manual unlocking and manual release — a lever hole takes a Bowden cable for front or rear actuation, so a jammed axis can be freed with the power off
- 300mm UL style 1569 AWG22 flying leads for direct wiring, no adapters or extra tails
Specifications
| POWER-OFF BRAKE SPECIFICATIONS | ||
|---|---|---|
| Nominal voltage | Vdc | 24 |
| Nominal torque(1) | Nm | 1 |
| Torque range(1)(2) | Nm | 0.60–1.20 |
| Nominal current(1) | A | 0.31 |
| Nominal input power(1) | W | 7.5 |
| Activation time | ms | 30 |
| Deactivation time | ms | 30 |
| Protection class | IP | 20 |
| Weight | kg | 0.45 |
| Noise | – | – |
| Diameter (Ø) | mm | 59 |
| Length (L) | mm | 42.3 |
| Strand colour GND | – | grey |
| Strand colour Vdc | – | grey |
| Strand length | mm | 300 |
| Strand type / cross section | – | UL style 1569 AWG 22 |
| (1) Values valid in run-in condition | ||
| (2) Over the temperature | ||
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.
FAQs
Related Products
- 3-phase EC motor with 10-pole neodymium magnet.
- 4096 cpr magnetic encoder MR 1 integrated.
- One-Connector-Solution.
- Supply voltage: 12Vdc to 110Vdc.
- Up to 359W continuous / 838W peak.
- Protection class up to IP65.
- Integrated 4Q controller with CANopen and IO mode.
- Fully CiA 402 compatible.
- 30 cpr integrated feedback.
- Protection class up to IP65.
- Up to 410W continuous / 684W peak output power.
- Integrated 4Q servo controller with FOC.
- 4096 cpr magnetic encoder MR 1.
- CANopen and IO mode, fully CiA 402 compatible.
- Safe Torque Off (STO) version available.
- Up to 482W continuous / 732W peak. IP65 protection.
- PROFINET, EtherCAT, and Ethernet/IP variants available.
- Integrated 4Q servo controller with 4096 cpr encoder.
- Safe Torque Off (STO) standard.
- Protection class up to IP65.
- Up to 490W continuous / 732W peak.
- 3-phase EC motor with 8-pole neodymium magnet.
- One-Connector-Solution.
- Supply voltage: 12Vdc to 325Vdc.
- Up to 546W continuous / 1150W peak.
- Premium efficiency. Protection class up to IP65.
- Integrated 4Q controller with CANopen and IO mode.
- Fully CiA 402 compatible.
- 24 cpr integrated feedback.
- Protection class up to IP65.
- Up to 633W continuous / 1029W peak output power.
- Integrated 4Q servo controller with FOC.
- 4096 cpr magnetic encoder MR 1.
- CANopen and IO mode, fully CiA 402 compatible.
- Safe Torque Off (STO) version available.
- Up to 807W continuous / 1317W peak. IP65 protection.
- Nominal Torque | 0.1Nm
- Nominal Current | –
- Nominal Input Power | 2.5W
- Nominal Torque | 0.2Nm
- Nominal Current | 0.20A
- Nominal Input Power | 5W
- Nominal Torque | 0.5Nm
- Nominal Current | 0.31A
- Nominal Input Power | 7.5W
- Nominal Torque | 1.5 Nm
- Nominal Current | 0.38 A
- Nominal Input Power | 9 W
- Nominal Torque | 3.3 Nm
- Nominal Current | 0.53 A
- Nominal Input Power | 12.7 W
- Nominal Torque | 7 Nm
- Nominal Current | 0.61 A
- Nominal Input Power | 14.7 W
- Nominal Torque | 0.3 Nm
- Nominal Current | 0.26 A
- Nominal Input Power | 6.3 W
- Nominal Torque | 0.4 Nm
- Nominal Current | 0.22 A
- Nominal Input Power | 6 W
- Nominal Torque | 1.7 Nm
- Nominal Current | 0.34 A
- Nominal Input Power | 8.2 W
- Nominal Torque | 2.5 Nm
- Nominal Current | 0.41 A
- Nominal Input Power | 10 W
- Nominal Torque | 4.5 Nm
- Nominal Current | 0.54 A
- Nominal Input Power | 13 W