Bosch Rexroth R3-PS3-R Power Supply Module

Bosch Rexroth R3-PS3-R Power Supply Module for Indramat Automation

The Bosch Rexroth R3-PS3-R is a high-efficiency power supply module engineered for the Indramat servo drive platform, delivering stable, regulated DC bus power to multi-axis drive systems while actively minimizing unplanned downtime across the entire motion control architecture. In modern manufacturing environments where equipment uptime and replacement lead time directly affect production continuity, the R3-PS3-R plays a central role in reducing idle power draw, stabilizing voltage under dynamic load conditions, and enabling predictive maintenance strategies that cut unplanned downtime.

Unlike generic power supply units, the R3-PS3-R is purpose-built for Bosch Rexroth’s Indramat ecosystem, ensuring seamless compatibility with drive controllers such as the TDM 1.2 and KDS 1.3 series, as well as digital servo amplifiers in the DKS and HDS families. This native integration eliminates impedance mismatches and communication overhead that can degrade drive response time and inflate operating load in mixed-vendor configurations.

Product Specification Table

System Compatibility and Application

Achieving genuine energy efficiency in a servo-driven production line requires more than a single high-performance component — it demands a coherent architecture where every element from power conditioning to motion feedback operates in coordination. The R3-PS3-R sits at the foundation of this architecture, supplying clean, stable DC bus voltage that allows downstream drive controllers to operate at their rated efficiency points without compensating for upstream voltage sag or ripple.

In a typical Indramat multi-axis configuration, the R3-PS3-R feeds regulated power to axis modules such as the TDM 1.2-100-300-W1 digital servo controller, which governs torque and velocity loops for servo motors on CNC spindle and feed axes. When paired with the KDS 1.3-100-300-W1 compact drive module on auxiliary axes, the shared DC bus architecture allows regenerative energy from decelerating axes to be redistributed to accelerating axes — a process that can reduce net operating load by Actual operating results depend on the installed system, load profile, and commissioning parameters.

For condition monitoring and power quality analysis, the R3-PS3-R installation is typically complemented by a Bosch Rexroth IndraControl L45 or equivalent PLC controller that logs bus voltage, current draw, and fault events in real time. Integration with an IndraLogic-based control program allows engineers to implement load-shedding routines during low-production windows, automatically reducing bus voltage setpoints and cutting standby losses during shift breaks or scheduled downtime.

On the I/O and communication layer, the R3-PS3-R system interfaces with Rexroth Inline I/O modules and SERCOS III or PROFIBUS DP fieldbus networks, enabling the host PLC to receive real-time drive status, temperature, and operating load data. This data feeds into HMI panels — such as the Rexroth IndraControl VCP 20 — where operators can monitor energy KPIs, set efficiency thresholds, and receive early warnings before thermal or overload conditions develop into costly failures.

Where regenerative energy recovery is a priority, the R3-PS3-R can be deployed alongside a Rexroth HNF regenerative power supply or a HMV supply module to feed recovered braking energy back to the mains grid, further reducing net energy costs in high-cycle applications such as stamping presses, injection molding machines, and robotic welding cells.

Maintenance and Replacement Notes

In automotive body-in-white welding lines, where dozens of servo axes cycle continuously at high speed, the R3-PS3-R’s stable DC bus output ensures that each TDM or DKS axis module receives consistent power regardless of the instantaneous load profile of neighboring axes. This eliminates the voltage dips that cause drive fault trips — one of the leading causes of unplanned line stoppages — and allows maintenance teams to shift from reactive repair to scheduled, condition-based servicing.

In CNC machining centers, the R3-PS3-R supports optimized spindle acceleration and deceleration profiles by providing the current headroom needed for high-torque ramp-up while recovering energy during spindle braking. When the machine controller — typically a Rexroth IndraMotion MTX CNC system — commands a rapid axis reversal, the regenerative current flows back through the R3-PS3-R’s DC bus and is absorbed by other active axes, reducing the peak demand charge on the facility’s electrical supply.

For packaging and palletizing lines operating 24/7, the R3-PS3-R’s robust design and tested reliability translate directly into reduced mean time between failures (MTBF) and lower spare parts inventory costs. Each unit shipped by ZYPLC undergoes full functional testing under load before dispatch, and is backed by a warranty terms confirmed during quotation, giving maintenance engineers confidence that replacement modules will perform to specification from day one. export shipping options available from RFQ-confirmed sourcing further minimizes the production impact of emergency replacements, reducing the window between fault detection and line restart from days to hours.

By consolidating power supply, regeneration, and bus management into a single, well-characterized module, the R3-PS3-R simplifies the energy audit process for ISO 50001 compliance, providing a clear, measurable point of intervention for energy reduction initiatives without requiring changes to the broader machine control architecture.

Product Sourcing FAQ

Q1: How much energy can the R3-PS3-R save compared to a standard power supply?
In multi-axis Indramat configurations with shared DC bus topology, the R3-PS3-R enables regenerative energy exchange between axes, which typically reduces net operating load by Actual operating results depend on the installed system, load profile, and commissioning parameters. Actual savings depend on the duty cycle, number of axes, and load profile of the specific machine.

Q2: Is the R3-PS3-R compatible with all Indramat drive series?
The R3-PS3-R is designed for the Bosch Rexroth Indramat platform and is compatible with TDM, KDS, DKS, and HDS series drive modules that share the same DC bus architecture. For specific compatibility with your existing drive configuration, please contact our technical team with your full system BOM.

Q3: What is the recommended replacement procedure and testing process?
Before shipment, every R3-PS3-R unit is tested under load to verify output voltage regulation, fault response, and thermal performance. Upon receipt, we recommend a bench verification of DC bus output voltage before installation. Replacement follows standard Indramat hot-swap procedures: de-energize the cabinet, discharge the DC bus, swap the module, and perform a controlled power-up sequence with the drive controller in inhibit mode.

Q4: What warranty and after-sales support does ZYPLC provide?
All R3-PS3-R units supplied by ZYPLC carry a warranty terms confirmed during quotation covering functional defects under normal operating conditions. Our technical support team is available to assist with installation, compatibility verification, and fault diagnosis. For urgent requirements, availability confirmed by RFQ units can be dispatched for fast global delivery to minimize production downtime.