DMA 045A 4101-D Bosch Rexroth Indramat
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MPN: 1070085632
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The Bosch Rexroth Indramat DMA 045A 4101-D is a 3-phase servo drive module in the DMA Servo Drive Modules series, designed for synchronous and asynchronous motors. It features air cooling with two fans, a regulated DC link of 670 VDC, and supports continuous currents of 23 Arms at 4 kHz and 15 Arms at 8 kHz. With a mass of 7.3 kg and a 16-bit analog interface, it also provides one axis positioning and includes a standard encoder interface.
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Product Description:
The DMA 045A 4101-D is a three-phase servo drive module built by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. It is intended to slot into an RMA/DM 45 backplane and convert the shared DC link into controlled stator currents for synchronous and asynchronous motors used in industrial automation. By integrating positioning logic for one axis, the module provides closed-loop velocity and position control without an external motion card. This arrangement allows the module to handle axis control directly within the rack.
The internal control electronics draw a standby current of 1.32 A from the 24 V utility bus, which keeps logic and relay functions active during startup. At a carrier frequency of 4 kHz, the inverter stage can supply a continuous phase current of 23 Arms, while the available continuous current drops to 15 Arms when the switching frequency is increased to 8 kHz. For short acceleration periods, the same 4 kHz setting permits a peak output of 51 Arms. Energy is sourced from the non-regulated DC link, which is maintained at 715 VDC by the common supply unit. Command data reach the DSP through a 16-bit analog interface, allowing proportional torque or speed references from legacy controllers.
Switching frequency and power loss determine the module’s thermal behavior during operation. When the carrier is set to 8 kHz, the drive can deliver up to 44 Arms for several seconds, after which the output current is reduced according to heat sink temperature. During regenerative events, the DC bus is held near 670 VDC by an active chopper to stabilize torque, and the inverter itself dissipates approximately 220 W under maximum continuous load. Two rear-mounted fans force air through the 50 mm wide aluminum channel, and the 7.3 kg assembly remains supported by the backplane guide rails. This forced airflow helps remove heat from the narrow module body during sustained operation.
Frequently Asked Questions about DMA 045A 4101-D:
Q: What is the 24 V supply demand for this DMA 045A 4101-D drive module?
A: The DMA 045A 4101-D requires a 24 V supply with a demand of 1.32 A.
Q: What additional function does the DMA 045A 4101-D support?
A: This module offers one axis positioning as an additional function.
Q: What is the continuous current capability at 4 kHz for the DMA 045A 4101-D?
A: At a 4 kHz switching frequency, the continuous output current is 23 Arms.
Q: What cooling method and fan configuration does the DMA 045A 4101-D use?
A: Cooling is provided by air cooling through the backplane, utilizing two fans.
Q: What interface type is included on the DMA 045A 4101-D module?
A: The DMA 045A 4101-D features a 16-bit analog interface type.
