DMA 85B 1201-D Bosch Rexroth Indramat
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MPN: 1070077088
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The Bosch Rexroth Indramat DMA 85B 1201-D is a standard variant 3-phase module for synchronous and asynchronous motors. Part of the DMA Servo Drive Modules series, it features air cooling via backplane and a gear encoder interface. This module offers a SERCOS interface and has a width of 100 mm.
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Product Description:
The DMA 85B 1201-D is a servo drive module manufactured by Bosch Rexroth Indramat within the DMA Servo Drive Modules series. It functions as a power stage for closed-loop motion axes, converting DC-bus energy into controlled AC output for synchronous and asynchronous motors in industrial automation systems. This lets connected axes accelerate, decelerate, and hold position with regulated torque and speed response during machine operation. Because the power section is supplied from a common DC bus, it can operate as part of a larger drive assembly where multiple axes share the same energy source. The unit is also identified within the Servodyn-D series, a designation used for cabinet planning and system organization.
Heat is removed by backplane air cooling, which carries semiconductor losses away through airflow along the rear panel instead of using front-mounted fans. Motion commands and parameter data are exchanged through the SERCOS interface, supporting deterministic communication in coordinated multi-axis systems. A dedicated gear encoder input allows the drive to read reduced-ratio feedback devices used on geared axes where motor speed and load speed differ. The housing has a width of 100 mm, which helps it fit alongside neighboring modules in dense control cabinets while preserving space for wiring and bus components. Rear-panel cooling also keeps the front of the module clear for terminals and service access, which supports orderly cabinet layouts.
The unit is supplied as a standard variant for baseline motion tasks that do not require added onboard options. As a three-phase module, it delivers balanced output currents for compatible motor connections on a shared DC link. When braking energy dissipation is needed, the installation uses separate external braking resistors rather than an integrated braking circuit inside the module. Input-side conditioning can likewise be handled with line filters when the electrical installation calls for reduced conducted interference. This arrangement leaves braking and input conditioning to separate cabinet components selected to match the machine's duty cycle and supply conditions.
Frequently Asked Questions about DMA 85B 1201-D:
Q: What type of cooling method does the DMA 85B 1201-D servo drive use?
A: This model utilizes air cooling through the backplane for thermal management.
Q: What kind of encoder interface does the DMA 85B 1201-D provide?
A: The DMA 85B 1201-D features a gear encoder interface for position feedback.
Q: Which interface option is available on the DMA 85B 1201-D?
A: This servo drive module is equipped with a SERCOS interface for communication.
Q: What is the module width of the DMA 85B 1201-D?
A: The module is 100 mm wide, allowing it to fit into standard control cabinet layouts.
Q: Which series does the DMA 85B 1201-D belong to?
A: The DMA 85B 1201-D is a standard variant in the Servodyn-D series of Bosch Rexroth Indramat.
