RD51.1-4N-018-L-C1-FW Bosch Rexroth Indramat
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MPN: R911200551
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The Bosch Rexroth Indramat RD51.1-4N-018-L-C1-FW is a drive controller from the RD 500 Drive Controllers series. It offers a rated power of 18.5 kW and operates within a voltage range of 380 to 480 V, with a tolerance of ±10 percent. This unit features forced air cooling, U/f curve control, and an integrated mains filter, operating as a converter for 3-phase AC supplies.
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Product Description:
The RD51.1-4N-018-L-C1-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Within an automation cell, it converts fixed-frequency three-phase mains power into a variable output that matches asynchronous motor requirements, enabling closed-loop speed regulation on pumps, fans, and general-purpose conveyors. It is intended for variable-speed applications that need stable motor response during changing load conditions. This type of operation is common in equipment that runs for long periods while speed is adjusted to match process demand.
This unit accepts a three-phase input through a three-phase AC converter front end and operates throughout a 380 to 480 V window, allowing deployment on common industrial supply networks. The DC link and control circuits tolerate line fluctuations of ±10 %, so no derating is required within that range. Under nominal conditions, it provides a continuous power throughput of 18.5 kW, which suits medium-frame induction motors used in general industrial service. Motor flux is modulated with U/f curve control, which keeps the voltage-to-frequency ratio constant to maintain torque at reduced speeds. Output devices and heat sinks are cooled by field-replaceable fans, and airflow is guided through internal channels to support thermal stability.
The thermal strategy uses forced air cooling, so cabinet designs must provide unobstructed intake and exhaust paths. Mains interference is minimized by an integrated mains filter, which eliminates the need for external line chokes in most applications. Regenerative energy is returned to the DC link because the module is supplied without a built-in brake chopper, so high-inertia systems may require an external chopper for rapid stops. Auxiliary electronics can remain energized during mains failures through the built-in 24 V standby power provision that supports systems up to 110 kW, which helps maintain control continuity during brief supply interruptions. The controller belongs to design generation 1.
Frequently Asked Questions about RD51.1-4N-018-L-C1-FW:
Q: What is the rated power of the RD51.1-4N-018-L-C1-FW drive controller?
A: The rated power output for the RD51.1-4N-018-L-C1-FW drive controller is 18.5 kW.
Q: What input voltage range does the RD51.1-4N-018-L-C1-FW support?
A: This drive controller operates at a voltage range of 380 to 480 V with a ±10% tolerance.
Q: What type of cooling does the RD51.1-4N-018-L-C1-FW drive controller use?
A: Forced air cooling is used for temperature management in this model.
Q: Does the RD51.1-4N-018-L-C1-FW include a built-in brake chopper?
A: The RD51.1-4N-018-L-C1-FW is designed without an integrated brake chopper.
Q: Is there an integrated mains filter in the RD51.1-4N-018-L-C1-FW drive controller?
A: A mains filter is integrated into this drive controller for power quality management.
