DMA 045A 9101-D Bosch Rexroth Indramat
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MPN: 1070085641
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The Bosch Rexroth Indramat DMA 045A 9101-D is a 3-phase module for synchronous and asynchronous motors, part of the DMA Servo Drive Modules series. It features a control bus supporting CANopen and CANrho, with a maximum current of 51 Amps RMS at 4 kHz and a rated current of 23 Amps RMS. The module has a mass of 7.3 kg and uses air cooling through the backplane.
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Product Description:
The DMA 045A 9101-D is a servo drive module manufactured by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. It is a 3-phase power module for synchronous and asynchronous motors, so it provides the output stage of a drive system rather than the motion controller itself. The unit installs as a backplane module on an RMA/DM 45 rail, where it receives low-voltage logic power, connects to a shared DC link, and supplies phase current to one machine axis. This arrangement supports compact multi-axis cabinet layouts with centralized power distribution.
This module draws a control supply of 1.32 A at 24 V to energize gate drivers and protective circuits. The common DC link operates at 670 VDC in a regenerative arrangement and rises to 715 VDC in non-regenerative operation, creating the bus voltage for the IGBT inverter. At a 4 kHz carrier frequency, it supplies a continuous line current of 23 A (RMS), while short acceleration bursts can reach 51 A (RMS) before current limiting intervenes. Internal dissipation is limited to 220 W, so the air-cooling channel behind the backplane must remain unobstructed for the fan pack to remove switching and conduction heat.
Command and diagnostic data move over CANopen and CANrho, and high-resolution rotor feedback arrives through the STG or MTG encoder ports. STG provides 20-bit resolution per turn, while MTG supplies 32-bit absolute data across 4,096 revolutions, allowing the control system to track rotor position accurately. The hardware supports single-axis positioning, but internal positioning control is disabled, so path execution remains with an external motion processor. Above 45 °C, the output must be derated by 0.65 A/K to protect the power semiconductors. The module has a width of 50 mm, a mass of 7.3 kg, and backplane air cooling that allows close spacing of multiple modules within a cabinet.
Frequently Asked Questions about DMA 045A 9101-D:
Q: What is the maximum output current of the DMA 045A 9101-D drive?
A: The DMA 045A 9101-D can deliver a maximum output current of 51 A (RMS) at 4 kHz.
Q: What cooling method is employed in the DMA 045A 9101-D servo drive module?
A: This module uses air cooling through the backplane for thermal management.
Q: Which control bus systems are compatible with the DMA 045A 9101-D?
A: The DMA 045A 9101-D supports CANopen and CANrho as control bus options.
Q: What is the rated continuous current of the DMA 045A 9101-D?
A: The rated current for continuous operation at 4 kHz is 23 A (RMS).
Q: What is the encoder resolution for MTG interface supported by the DMA 045A 9101-D?
A: The MTG encoder interface provides a resolution of 32 bits and supports 4096 revolutions with absolute feedback.
