DMA 085B 4201-D Bosch Rexroth Indramat
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MPN: 1070085650
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The Bosch Rexroth Indramat DMA 085B 4201-D is a 3-phase servo drive module in the DMA Servo Drive Modules series. It provides continuous current ratings of 47 Arms at 4 kHz and 31 Arms at 8 kHz, with a peak current of 86 Arms and 63 Arms, respectively. The module supports air cooling from the backplane, has a gear encoder interface, and measures 504 mm in height, 100 mm in width, and 288 mm in depth.
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Product Description:
The DMA 085B 4201-D is a servo drive module manufactured by Bosch Rexroth Indramat within the DMA Servo Drive Modules series. Classified as a three-phase module for synchronous and asynchronous motors, it converts energy from the shared DC rail into regulated motor currents while accepting motion commands from the machine controller. Cabinet installation is on a ventilated backplane that supports the drive’s air-cooling method, and motor feedback arrives through its dedicated gear encoder interface for closed-loop control. This arrangement suits multi-axis cabinets where several drives share common power infrastructure and require stable motor regulation during coordinated motion.
The drive’s continuous output capability reaches 47 Arms at a 4 kHz switching frequency and 31 Arms when the pulse pattern is raised to 8 kHz, giving two current ranges for different operating priorities. Transient demands are handled with peak limits of 86 Arms at 4 kHz and 63 Arms at 8 kHz, allowing short acceleration bursts without exceeding thermal margins. An auxiliary 24 V DC supply must deliver 1.35 A so the control electronics and fans remain active during power-off conditions. Command values enter through a 16-bit analog setpoint interface that provides fine resolution for torque and speed loops. The air-cooling channel pulls heat toward the backplane, which helps limit temperature rise around nearby modules in a densely populated rack.
The internal DC link operates in a range of 670 VDC to 715 VDC, and worst-case conversion losses are limited to 380 W, which guides enclosure ventilation and power distribution. When ambient temperature rises above the nominal point, current must be reduced by 1.25 A/K at 4 kHz or 0.95 A/K at 8 kHz to remain within safe semiconductor limits. The module measures 504 mm in height, 100 mm in width, and 288 mm in depth, so it occupies a single slot while still housing its backplane fan assembly. Its mass of 11.5 kg gives the unit a solid mounting profile, and the vertical format helps maintain orderly cable routing and airflow paths inside the cabinet.
Frequently Asked Questions about DMA 085B 4201-D:
Q: What continuous current does the DMA 085B 4201-D provide at 4 kHz?
A: The DMA 085B 4201-D supports a continuous current of 47 Arms at a 4 kHz switching frequency.
Q: What method is used for cooling the DMA 085B 4201-D servo drive module?
A: This model uses air cooling through the backplane for thermal management.
Q: What type of encoder interface does the DMA 085B 4201-D include?
A: The DMA 085B 4201-D features a gear encoder interface for feedback integration.
Q: What kind of setpoint interface does the DMA 085B 4201-D module offer?
A: The setpoint interface of this drive module is analog and operates with 16-bit resolution.
Q: What is the DC link voltage of the DMA 085B 4201-D module?
A: This module has a DC link voltage rating of 670 VDC or 715 VDC.
