Product Description:

The RD52.1-4B-132-R-V1-FW is a controller from the Bosch Rexroth Indramat RD 500 Drive Controllers series. It is intended for high-power induction and synchronous motor systems, where it governs torque and speed through closed-loop current and voltage regulation. Within a plant-wide motion platform, the unit links upstream mains supplies to downstream drive functions and converts incoming electrical power into conditioned output that matches motor demand. Its control and diagnostic functions support continuous industrial operation in automated machinery.

Rated output reaches 132 kW, giving the controller suitable capacity for conveyors, extruders, and large pumps. The permissible input spans 380 to 480 V, and the supply can vary by ±10 % without exceeding the stated operating range. Inside the control section, field-oriented vector control modulates current components so torque response follows command values with minimal delay. Rapid deceleration is handled by a built-in brake chopper that diverts regenerated energy to external resistors and helps prevent DC-bus overvoltage. This operating method also supports controlled braking when high-inertia loads return energy to the drive.

Power enters through a 3 × AC converter front end that includes an integrated mains filter to reduce conducted emissions and simplify cabinet wiring. Thermal losses at full load are removed by liquid cooling with an internal pump, which helps keep heat sink temperature stable and reduces excess heat inside sealed enclosures. During a utility outage, the control electronics remain active through an external 24 V standby power line, allowing communication functions and stored settings to remain available. This separate standby supply helps the controller stay responsive during short interruptions of the main input.