RD51.1-5B-045-L-D1-FW Bosch Rexroth Indramat
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MPN: R911200789
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The Bosch Rexroth Indramat RD51.1-5B-045-L-D1-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 45 kW and operates within a voltage range of 500 V. This model features U/f curve control, forced air cooling, and a built-in brake chopper. It includes a NAMUR terminal strip, 24 V external standby power, and supports converter 3 phase AC supply.
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Product Description:
The RD51.1-5B-045-L-D1-FW is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. Installed in motor control centers, it converts constant-frequency mains power into a variable output matched to induction motor requirements. By scaling voltage with frequency, the unit supports accurate conveyor pacing, pump throttling, and exhaust fan regulation across automated lines. This operating method helps reduce abrupt starts and allows process equipment to run at speeds matched to demand instead of full line frequency. Its chassis fits standard 400 mm cabinets and connects to supervisory PLC hardware through a dedicated terminal strip, which supports integration into existing control systems without extra interface modules.
This controller is supplied through a three-phase AC converter input and is rated for continuous delivery of 45 kW to the connected motor load. Speed adjustment is handled by U/f curve control, which keeps magnetic flux stable while torque demand changes over the operating range. During rapid deceleration, a built-in brake chopper directs excess DC-link energy to an external resistor so the intermediate circuit stays within safe limits. That arrangement supports controlled stopping on high-inertia loads without causing an excessive rise in DC-bus voltage. Internal heat is removed by forced air cooling, so the cabinet needs an unobstructed airflow path to keep the power semiconductors within their allowed temperature range.
Line connection may range up to 500 V, which matches common industrial distribution networks. The wiring area uses a NAMUR terminal strip for status contacts and interlocks, while a separate feed accepts external 24 V standby power so the control electronics can remain active and preserve stored parameters during a main power loss. This arrangement keeps control wiring separate from the power section and makes external monitoring circuits easier to route inside the cabinet. The model is part of generation 1 within the RD platform.
Frequently Asked Questions about RD51.1-5B-045-L-D1-FW:
Q: Does the RD51.1-5B-045-L-D1-FW include a brake chopper?
A: The RD51.1-5B-045-L-D1-FW features a built-in brake chopper for efficient braking operations.
Q: What is the rated power of the RD51.1-5B-045-L-D1-FW drive controller?
A: A rated power of 45 kW is supported by this drive controller.
Q: What cooling method does the RD51.1-5B-045-L-D1-FW utilize?
A: Forced air cooling is used to maintain the temperature of this unit during operation.
Q: What voltage range does the RD51.1-5B-045-L-D1-FW support?
A: The voltage range for this model is specified at 500 V.
Q: What type of control is used in the RD51.1-5B-045-L-D1-FW drive controller?
A: The RD51.1-5B-045-L-D1-FW employs U/f curve control for managing motor speed and torque.
