Rexroth R911335596 | HCS01.1E-W0008-A-03-B-ET-EC-NN-L3-NN-FW | High-Performance Servo Drive for New Project Selection

Key Technical Specifications

• Product Model: R911335596 HCS01.1E-W0008-A-03-B-ET-EC-NN-L3-NN-FW
• Manufacturer: Bosch Rexroth
• System Family: IndraDrive HCS01.1E series
• Rated Output Current: 8 A continuous
• Peak Current: 24 A (for up to 3 s)
• Supply Voltage: 200–480 V AC (three-phase)
• Communication Interface: EtherCAT (EC), with Sercos III option available in other variants
• Safety Functions: STO (Safe Torque Off) compliant to SIL 3 / PL e
• Mounting Type: Wall-mounted, IP20 protection
• Cooling Method: Convection-cooled (no fan required)
• Encoder Feedback Support: EnDat 2.2, BiSS C, incremental TTL/Hiperface (via optional modules)

Core Performance and Selection Advantages

The Rexroth HCS01.1E-W0008 model delivers a compelling balance of performance, integration, and efficiency for modern machine designs. With a continuous output current of 8 A and a peak of 24 A, it supports dynamic motion profiles typical in high-speed packaging or pick-and-place applications. Compared to legacy drives, its integrated DC bus architecture enables regenerative energy sharing across multiple axes, reducing overall system energy consumption by up to 15% in multi-axis setups.

A key differentiator is the native EtherCAT interface (indicated by “EC” in the model suffix), which eliminates the need for external communication gateways and simplifies network topology. This drive also includes built-in STO functionality certified to PL e / SIL 3, removing the requirement for external safety relays in many applications—thereby lowering component count and panel space.

From a total cost of ownership (TCO) perspective, the drive’s convection cooling (fanless design) reduces maintenance needs and increases reliability in dusty environments. Its compatibility with Rexroth’s IndraWorks engineering suite streamlines commissioning, cutting programming and tuning time by an estimated 20–30% compared to non-integrated solutions. The compact form factor further contributes to smaller control cabinets, directly impacting enclosure and shipping costs in OEM deployments.

System Integration and Scalability

This drive is engineered for seamless integration within Bosch Rexroth’s broader automation ecosystem but also interoperates effectively in heterogeneous environments. It is configured and programmed using IndraWorks S200, part of the broader ctrlX AUTOMATION platform, which supports object-oriented engineering, version control, and simulation—features that accelerate development cycles and enhance code reusability across projects.

On the networking side, the native EtherCAT interface ensures real-time deterministic communication with cycle times as low as 125 µs, ideal for synchronized multi-axis applications. The drive also supports OPC UA over TSN (Time-Sensitive Networking) in newer firmware versions, enabling direct data exchange with MES and cloud platforms without additional protocol converters. This facilitates predictive maintenance and OEE monitoring in Industry 4.0 architectures.

In terms of scalability, the HCS01.1E series supports daisy-chaining via the DC bus, allowing up to 16 drives to share regenerative energy without braking resistors. While this specific model is a single-axis unit, it can be combined with higher-power HCS or HCN variants in the same cabinet. Maximum I/O expansion is achieved through optional digital/analog modules or integration with IndraControl L/V PLCs. Redundancy is not natively supported at the drive level, but system-level redundancy can be implemented via dual-cabinet topologies or controller-side failover logic.