Dunkermotoren E50A Power-On Brake

The Dunkermotoren E50A is a 24 Vdc power-on brake rated at 0.4 Nm nominal torque, with a torque range of 0.25–0.60 Nm over the temperature range. A power-on brake applies torque when it is energised and releases when supply is removed. This is the opposite of the power-off brakes in the Dunkermotoren range. It is specified where braking is a commanded function rather than a fail-safe one, since the axis is free when the machine is unpowered.

The E50A draws 0.22 A at 6 W nominal input power, engaging in 5 ms and releasing in 15 ms: the quickest engagement in the power-on series. It measures 39 mm in diameter by 35 mm long, weighs 0.12 kg and runs with low noise. Dunkermotoren rates it IP 30/65, the only brake in the range carrying two protection figures. Connection is by 400 mm leads of 0.25 mm² cross-section, red/green for GND and blue/green for Vdc.

Power-on brakes are supplied on request. All rated values apply in the run-in condition.