DMA 085B 7101-D Bosch Rexroth Indramat
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MPN: 1070079656
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The Bosch Rexroth Indramat DMA 085B 7101-D is a three-phase servo drive module from the DMA Servo Drive Modules series. It supports both synchronous and asynchronous motors, features a 24 V power demand of 1.35 Amps, and provides one axis positioning. The module uses air cooling via backplane, has dimensions of 504 mm in height, 288 mm in depth, and 99 mm in width, and supports CANrho setpoint interface and position resolutions up to 32 bits.
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Product Description:
The DMA 085B 7101-D is a servo drive module manufactured by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. As a three-phase controller for synchronous and asynchronous motors, it forms the power section of multi-axis systems used in industrial robots, transfer lines, and material-handling equipment. By combining a high DC link voltage with integrated axis logic, the drive supplies regulated current to a connected motor and executes single-axis positioning tasks required for deterministic motion loops in automation cells. This arrangement allows the module to handle both power conversion and local motion control within the same housing, which helps keep the axis response consistent during coordinated machine movement.
At the power stage, the module operates from a non-regulated DC link of 715 VDC, which is actively held at 670 VDC when regulation is enabled to reduce ripple during dynamic load changes. Auxiliary electronics draw just 1.35 A from the 24 V control supply, so the control circuit places only a modest demand on the cabinet supply. Thermal losses reach 380 W under maximum load, and two integrated fans remove that heat through backplane air cooling, keeping semiconductor temperatures within their operating range while preserving front access for wiring and diagnostics. The cooling path also avoids large external heat sinks, which helps the module fit neatly into dense cabinet layouts where several axes share the same enclosure.
Motion feedback enters through STG or MTG interfaces, giving multi-turn tracking up to 4096 rev and a digital resolution of 32 bits, while the single-turn channel retains 20 bits for fine interpolation within each revolution. The drive resides on the RMB/DM backplane, which routes the CANrho setpoint bus and distributes DC link energy across modules. One-axis positioning is embedded, and the unit accepts rho3 or rho4 robot control commands without external processors. Physical integration is supported by its 504 mm height, 99 mm width, and 288 mm depth, which suit standard Euro-cabinet slots and allow orderly installation beside neighboring drive modules.
Frequently Asked Questions about DMA 085B 7101-D:
Q: What types of feedback does the DMA 085B 7101-D servo drive module support?
A: The DMA 085B 7101-D supports STG and MTG feedback for precise motor position tracking.
Q: What setpoint interface is available on the DMA 085B 7101-D?
A: This drive module features a CANrho setpoint interface for communication and control integration.
Q: How is the DMA 085B 7101-D servo drive module cooled?
A: The DMA 085B 7101-D is cooled using air via a backplane system and is equipped with two fans.
Q: What additional motion control function is included with the DMA 085B 7101-D?
A: One axis positioning is built into this model as an additional function for motion control.
Q: What backplane does the DMA 085B 7101-D module require for installation?
A: A required backplane of type RMB/DM is necessary for correct installation of this module.
