Brake-Manager Operates as a Chopper


The Dynamic Brake-Manager DBM 4.0, weighing approximately 6 kg and measuring 340 x 102 x 187 mm, operates as a braking chopper in a DC link, i.e. when a preset voltage is exceeded, the DBM 4.0 switches onto a safe brake resistor, thereby diverting brake energy from the system in a highly dynamic manner.


The maximum brake power of the DBM 4.0 is 28.8 kW, at a duty cycle of up to 5% and a maximum operating voltage of 800 VDC. The DBM 4.0 can be attached to a single drive controller as well as to a multi-axis system or a larger DC network. Its integration capacity, performance and communication capabilities are important key features. Depending on the application, the Dynamic Brake-Manager DBM 4.0 is offered as a stand-alone unit or in conjunction with a safe brake resistor from the same company.


The flexible DBM 4.0 can be operated with different single resistors and combinations, depending on the application. The resistor is selected according to the performance requirement and the duty cycle. Koch finds the right solution for their customers for each operating point per DBM 4.0 connected. The resistor can be placed where the waste heat can best be dissipated. If one DBM 4.0 is not sufficient, a parallel connection is also possible. Thanks to its versatile communication capabilities, valuable information such as status, performance and DC link voltage can be read out at any time, also on a bus system.


Parameter                                        Value
Ambient temperature-10 to +65°C (transport, storage)
0 to +40°C (operation)
Relative humidity<95% (transport, storage)
<85% (operation)
Type of coolingair cooling (convection)
Protection class of the housingIP20
Degree of contamination
of installation location    


Parameter                                                               Value                                 
Maximum brake power

28,8 kW up to 5% duty cycle
(120 s cycle)

Max. operating voltage800 VDC
Dimensions mm H x W x D340 x 102 x 187 mm
Digitale I/Os+
Bus connectionRS422/RS485
Weightca. 6,0 kg
Protection classIP20
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