HCS02.1E-W0070-A-03-NNNN Single-Axis Servo Drive / Amplifier

The Rexroth HCS02.1E-W0070-A-03-NNNN​ is a high-performance, compact servo drive from Bosch Rexroth’s HCS (Hardware Control System) series, designed to form the core of a precise and dynamic electric motion control system. This digital drive functions as a sophisticated power amplifier and intelligent controller, managing a single servo motor by precisely regulating current (torque), speed, and position based on commands from a superior motion controller or PLC. As part of the modular IndraDrive family, it integrates seamlessly with Rexroth’s control architecture. The HCS02.1E-W0070-A-03-NNNN​ is engineered for demanding applications that require high dynamic response, accuracy, and reliability. It supports various feedback systems and communicates over high-speed real-time networks like SERCOS III or Ethernet-based protocols, enabling synchronized multi-axis control. In automated machinery such as packaging lines, printing presses, robotics, and machine tools, this servo drive provides the muscle and intelligence for rapid positioning, precise speed control, and coordinated movements, directly contributing to increased machine throughput, improved product quality, and enhanced energy efficiency.

The Rexroth HCS02.1E-W0070-A-03-NNNN​ stands out for its seamless system integration and advanced, user-friendly technology. A key advantage is its native integration with the IndraDrive ecosystem and high-performance communication networks like SERCOS III or EtherCAT. This allows for deterministic, jitter-free data exchange with the motion controller, enabling precise multi-axis coordination essential for complex automation tasks. The drive features highly efficient pulse-width modulation (PWM) technology and an optimized thermal design, allowing it to deliver high continuous current (7A RMS) in a compact, convection-cooled package, saving panel space and eliminating fan maintenance.

For setup and optimization, the drive includes powerful software tools like Rexroth’s IndraWorks, which offers automatic motor identification, comprehensive diagnostics, and easy parameterization. The integrated Safe Torque Off (STO) safety function meets safety standards (e.g., SIL 3/PL e) and simplifies safety circuit design by providing a safety-rated motor shutdown path directly within the drive. Its modular “book-size” design allows for dense side-by-side mounting, optimizing cabinet space. For the machine builder, this drive delivers a combination of high power density, simplified wiring through advanced communication, and reduced engineering time via integrated software, resulting in a more compact, capable, and reliable motion control system.

The Rexroth HCS02.1E-W0070-A-03-NNNN​ is engineered for high-performance motion control in advanced industrial automation. It is extensively used in packaging machinery​ for precise control of form-fill-seal operations, robotic pick-and-place arms, and labeling systems. In printing and converting, it drives printing cylinders, cutters, and web guides, requiring exceptional synchronization for high-quality output. The machine tool​ industry utilizes it for controlling auxiliary axes, tool changers, and feed drives where accuracy and reliability are critical.

It is also a core component in robotics, providing the joint actuation for articulated arms, and in material handling​ systems such as high-speed sorting conveyors and automated storage/retrieval systems (AS/RS). Essentially, any application requiring precise, dynamic, and networked control of a servo motor in the low to mid-power range—where rapid acceleration, accurate positioning, and seamless integration into a larger control system are required—is an ideal application for this servo drive.

Installation Preparation: Prior to installation, design the panel layout to allow adequate spacing for convection cooling as per the manual. Ensure a clean, stable 3-phase AC power supply within the drive’s specified voltage range is available, protected by the correctly sized fuses or circuit breakers. Use shielded, symmetrically twisted motor and feedback cables, grounding the shield properly at the drive end to minimize electromagnetic interference. Connect the safety circuit (STO) according to the safety function requirements and relevant standards. Network cabling (SERCOS III/EtherCAT) must use the specified cables and connectors, with proper line termination.

Maintenance Recommendations: The drive is designed for minimal maintenance due to its convection cooling (no fans). Primarily, ensure the installation environment remains within the specified temperature and humidity ranges and that the heat sink fins are kept clean and unobstructed. Regularly monitor drive parameters (temperature, load) via the engineering software during operation to establish a baseline and detect any abnormal trends. Keep firmware up to date with stable releases from Rexroth. In the event of a fault, use the detailed diagnostic information and status LEDs on the drive in conjunction with IndraWorks software for efficient troubleshooting. Always follow lock-out/tag-out procedures before performing any electrical work.