Bosch Rexroth R911329914 Retrofit Servo Drive for Legacy Systems

Bosch Rexroth R911329914 Retrofit Servo Drive for Legacy Systems

The Bosch Rexroth R911329914 — model designation CSH01.3C-SE-EN2-NNN-CCD-S2-S-NN-FW — is a compact single-axis servo drive from the IndraDrive Cs series, engineered for high-precision motion control in demanding industrial environments. As legacy automation systems reach end-of-life and original spare parts become increasingly scarce, the R911329914 has emerged as a critical retrofit component for plant engineers tasked with sustaining production continuity without committing to a full control system overhaul. Whether you are replacing a failed drive in an existing IndraDrive Cs rack, upgrading from an older IndraDrive C or IndraDrive M platform, or migrating a legacy Rexroth DIAX04 or ECODRIVE03 axis to a modern SERCOS III or EtherCAT communication backbone, the CSH01.3C provides a technically sound and commercially viable upgrade path.

The CSH01.3C variant supports SERCOS III and EtherCAT fieldbus communication (EN2 interface designation), making it directly compatible with modern Bosch Rexroth IndraMotion MLC and IndraMotion MTX controller platforms. Its compact form factor is designed for installation in standard 19-inch control cabinets alongside the HMS01 mains filter and power supply module, and it shares the same DC bus architecture used across the IndraDrive Cs family, allowing engineers to integrate it into existing multi-axis configurations without redesigning the power distribution rail.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

Successful integration of the R911329914 into an existing production line requires a structured pre-retrofit assessment. Engineers should begin by auditing the current control cabinet layout to confirm available rail space and DC bus capacity. In multi-axis configurations, the HMS01 mains filter and power supply module must be verified to support the additional axis load introduced by the CSH01.3C. If the existing supply module is already operating near its rated output, a parallel HMD01 DC bus supply or an additional HCS02 regenerative power supply unit may be required to maintain system stability under peak load conditions.

Terminal wiring is a common source of commissioning delays during retrofit projects. The CSH01.3C uses a standard IndraDrive Cs terminal layout, but engineers migrating from legacy DIAX04 or ECODRIVE03 drives must remap control signal terminals, enable inputs, and safety relay connections to match the new drive’s I/O assignment. The CDB01 double-axis drive, often found in adjacent slots within the same cabinet, shares a compatible terminal philosophy and can serve as a wiring reference during the migration process.

Communication protocol migration is another critical planning step. If the existing machine controller communicates via SERCOS II, the EN2 interface on the CSH01.3C supports SERCOS III, which is backward-compatible at the physical layer but requires firmware and parameter updates on both the drive and the master controller. Engineers using an IndraMotion MLC L45 or L65 controller should verify that the controller firmware version supports mixed SERCOS II and SERCOS III ring configurations during the transition period. For systems migrating to EtherCAT, the SUP-E02 engineering interface module and updated IndraWorks project files will be required to reconfigure the axis communication parameters.

Motor encoder compatibility must be confirmed before installation. The CCD encoder interface on the R911329914 supports Hiperface and EnDat 2.2 absolute encoders, which are standard on current MSK and MKE servo motor series. However, legacy MHD and MKD motors equipped with resolver or incremental encoders will require an RFN01 resolver feedback module or an encoder signal converter to interface correctly with the CSH01.3C. Encoder cable routing should also be reviewed, as the R911170856 shielded encoder cable assembly is recommended for EMC compliance in high-interference cabinet environments.

For systems that include HMI integration, engineers should verify that existing IndraDrive parameter sets and axis diagnostic screens in the HMI project are compatible with the CSH01.3C parameter structure. BTV panel terminals and IndraDrive-compatible HMI projects may require screen updates to reflect the new drive’s diagnostic register mapping. This is particularly relevant in applications where the HMI displays real-time axis status, fault codes, or drive temperature readings sourced directly from the drive’s parameter memory.

Signal isolation between the drive’s analog I/O and the machine’s PLC input cards should also be reviewed. In legacy installations where 4–20 mA torque reference or speed reference signals are used, a signal isolator or RMB02 regenerative module may be required to prevent ground loop interference that can cause erratic axis behavior after the drive replacement. Pre-shipment functional testing of the R911329914 is performed at our facility to verify drive initialization, encoder feedback recognition, and communication link establishment before the unit is dispatched.

Downtime Control During System Migration

Minimizing unplanned downtime is the primary concern for maintenance engineers replacing a failed IndraDrive Cs axis in a live production environment. The R911329914 is held in stock and can be dispatched within 24 hours of order confirmation, reducing the lead time risk that is common with discontinued or end-of-life spare parts. Upon receipt, engineers should perform a visual inspection of the drive housing, terminal blocks, and communication interface connectors before installation.

To protect the original axis program logic, the existing drive’s parameter set should be backed up using IndraWorks Ds before the failed unit is removed from the cabinet. If the original drive is non-functional and parameter backup is not possible, the axis parameters can often be reconstructed from the machine builder’s commissioning documentation or from a backup stored in the IndraMotion controller’s non-volatile memory. Restoring a known-good parameter set to the replacement CSH01.3C eliminates the need for full axis re-tuning and significantly reduces the time required to return the machine to production.

During the physical swap, the DC bus must be fully discharged before disconnecting the drive from the power rail. The HMS01 supply module’s DC bus discharge indicator should be confirmed at zero before any terminal work begins. After installation, the SERCOS or EtherCAT ring must be re-initialized and the axis address verified to match the original drive’s node assignment. A brief no-load test cycle should be performed to confirm encoder feedback, direction of rotation, and velocity loop stability before the machine is returned to automatic mode.

Field commissioning support is available through our technical team for customers who require remote guidance during the drive replacement and parameter restoration process. All units are supplied with a pre-shipment test report confirming drive initialization and communication link verification.

Retrofit Support FAQ

Q: Is the R911329914 CSH01.3C a direct replacement for my existing IndraDrive Cs axis?
A: Yes, the CSH01.3C is a direct form-fit-function replacement for other CSH01.3C units within the IndraDrive Cs family. For cross-series replacements from DIAX04 or ECODRIVE03, terminal remapping and firmware updates are required. Our technical team can provide a compatibility assessment based on your existing drive model number and cabinet layout.

Q: What commissioning tools are required after installation?
A: IndraWorks Ds or IndraWorks Engineering software is required to upload axis parameters, configure the SERCOS III or EtherCAT communication address, and perform initial axis tuning. A laptop with a USB or Ethernet connection to the drive’s engineering interface is sufficient for most commissioning tasks.

Q: How do I verify wiring compatibility before installation?
A: Download the CSH01 terminal assignment diagram from the Bosch Rexroth documentation portal and compare it against your existing cabinet wiring schematic. Pay particular attention to the enable input, safety relay, and encoder connector pinout. If your existing motor uses a resolver or incremental encoder, contact us to confirm whether an adapter or feedback module is required.

Q: What does the 12-month warranty cover, and is stock available for immediate dispatch?
A: The 12-month warranty covers manufacturing defects and drive failure under normal operating conditions. Each unit undergoes a pre-shipment functional test, and a test report is included with the shipment. Stock is maintained for immediate dispatch, with typical lead times of 1–3 business days depending on destination. Contact our sales team to confirm current stock availability and shipping options for your region.