Rexroth 1070089509-GA1 Replacement for MSK Series

Product Overview

Rexroth 1070089509-GA1 Replacement for MSK Series: Smooth Transition & Legacy System Compatibility

The Bosch Rexroth 1070089509-GA1 is a high-performance AC servo motor from the renowned MSK Series, engineered for precision motion control in demanding industrial automation environments. As legacy drive systems age and OEM support for discontinued models becomes increasingly limited, plant engineers and procurement teams face mounting pressure to source reliable replacement units that maintain full compatibility with existing control architectures — without triggering costly line shutdowns or extensive reprogramming cycles.

This replacement and upgrade solution is specifically designed for facilities migrating away from end-of-life servo configurations, whether driven by obsolescence, mechanical failure, or a planned modernization initiative. The 1070089509-GA1 integrates seamlessly into Rexroth IndraDrive and DIAX04 drive platforms, preserving your existing wiring harness, feedback encoder connections, and motor mounting footprint. Engineers transitioning from older MSK050 or MSK060 frame variants will find that the shaft dimensions, flange interface (IEC 72-1 compliant), and connector pinout remain consistent, dramatically reducing retrofit labor hours.

For facilities running Bosch Rexroth IndraDrive Cs (HCS01) or IndraDrive C (HCS02/HCS03) drive controllers, the 1070089509-GA1 is fully compatible with the standard SERCOS III and PROFIBUS-DP communication protocols already deployed in your control cabinet. No gateway modules or protocol converters are required. If your system uses an older DIAX04 HDD or HDS drive unit, the motor’s feedback interface supports both resolver and EnDat 2.1 encoder variants, allowing a direct swap without modifying the drive parameter set beyond basic motor data entry.

Control cabinet space is a frequent constraint during servo motor replacement projects. The MSK Series compact frame design ensures that the 1070089509-GA1 fits within the original motor mounting envelope, eliminating the need to modify cable trays, conduit routing, or adjacent component clearances. The motor’s IP65 protection rating and Class F insulation are retained, making it suitable for wash-down environments and high-ambient-temperature machine rooms alike.

When upgrading from a discontinued MKD or MDD Series Rexroth motor, the 1070089509-GA1 serves as a validated cross-reference replacement. The transition typically requires updating the motor data record (MDR) within the IndraDrive firmware and verifying the current loop tuning parameters — a process that can be completed in under two hours using the IndraWorks DS commissioning software without requiring a full machine re-qualification. Paired with a Rexroth R-IB IL 24 DI 8/HD-PAC terminal block for I/O signal conditioning or a VCP 20 operator panel for local diagnostics, the upgrade path is straightforward and well-documented.

For multi-axis systems, the 1070089509-GA1 can be deployed alongside IndraDrive Mi (KCU/KSM) distributed servo drive modules, sharing a common DC bus and reducing panel wiring complexity. Systems currently using Rexroth PLC IL 40 E BK-PAC or CML40.2 motion logic controllers will benefit from the native integration between the MSK motor series and Rexroth’s IEC 61131-3 programming environment, preserving existing ladder logic and function block libraries without modification.

Power supply compatibility is another critical consideration during servo replacement. The 1070089509-GA1 operates on a standard 3-phase 400V AC input (via the connected drive), compatible with Rexroth HNF01 mains filter and HNL01 line choke assemblies already installed in most Rexroth drive cabinets. No additional power conditioning hardware is required for a like-for-like replacement scenario.

Procurement teams will appreciate that TOPNLMS maintains verified stock of the 1070089509-GA1 with full traceability documentation. Each unit undergoes pre-shipment functional testing, including no-load run verification, insulation resistance check, and encoder signal integrity validation. Units are shipped in anti-static, shock-absorbing packaging with a detailed inspection report.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful servo motor replacement rarely involves the motor alone. During the migration from a legacy MSK or MKD motor to the 1070089509-GA1, the following components are commonly evaluated or replaced in parallel to ensure system-level reliability:

The Rexroth IndraDrive C HCS02.1E servo drive is the most common companion unit for MSK Series motors in mid-range axis applications. If the existing drive is approaching end-of-life or showing fault codes related to motor feedback errors, replacing both the motor and drive simultaneously eliminates the risk of a secondary failure shortly after the motor swap. For compact machine designs, the IndraDrive Cs HCS01.1E offers an integrated single-axis solution with a reduced panel footprint.

Feedback cable integrity is frequently overlooked during motor replacement. The Rexroth IKS4044 EnDat encoder cable and IKS0223 resolver cable assemblies are pre-terminated to MSK motor connector specifications and should be inspected or replaced alongside the motor to prevent intermittent feedback faults after commissioning. Similarly, the IKS4043 power cable assembly with M23 connector ensures correct phase sequencing and shielding continuity.

For systems integrating the 1070089509-GA1 into a multi-axis Rexroth IndraDrive Mi topology, the KCU02 drive coupler and KSM02 integrated servo drive module provide distributed axis control directly at the motor, eliminating individual drive cabinets and reducing overall installation complexity. The HNF01 mains filter and HNL01 line choke should be verified for current rating compatibility when adding axes to an existing DC bus system.

On the control side, facilities using a Rexroth CML40.2 or CML65.2 motion logic controller can retain their existing IEC 61131-3 programs without modification. The motor data record (MDR) for the 1070089509-GA1 is available as a standard file import within IndraWorks DS 14V and later, streamlining the commissioning process to a parameter upload and axis test sequence rather than a full re-tuning exercise.

Where signal isolation between the servo system and a legacy PLC backplane is required — particularly in mixed-voltage control cabinets — a Rexroth R-IB IL 24 DI 8/HD-PAC digital input terminal or a third-party DIN-rail signal isolator can be inserted between the drive’s digital I/O and the PLC I/O module without affecting servo loop performance.

Retrofit Guidance FAQ

Q: Can I replace my existing MSK motor with the 1070089509-GA1 without rewiring the power and feedback cables?
A: In most cases, yes. The 1070089509-GA1 uses the standard M23 power connector and M17 feedback connector common to the MSK Series. If your existing cables are in good condition and correctly rated, they can be reused directly. Always verify cable shielding continuity and insulation resistance before reconnecting.

Q: Do I need to modify my IndraDrive firmware or parameter set after installing the 1070089509-GA1?
A: You will need to load the motor data record (MDR) for the 1070089509-GA1 into the drive using IndraWorks DS. This is a standard procedure that takes approximately 15–30 minutes. No firmware upgrade is required unless your drive is running a version older than IndraWorks 12V.

Q: Is the 1070089509-GA1 compatible with PROFIBUS-DP and SERCOS II systems?
A: The motor itself is protocol-agnostic — communication protocol compatibility is determined by the IndraDrive controller. PROFIBUS-DP and SERCOS II are supported by the HCS02 and DIAX04 drive families. SERCOS III and EtherCAT are available on newer IndraDrive C and Mi platforms.

Q: What is the physical installation clearance requirement for the 1070089509-GA1?
A: The MSK Series motor maintains the same mounting flange dimensions as predecessor models in the same frame class. No additional clearance is required beyond the original motor envelope. Verify the shaft key and coupling bore dimensions match your mechanical load before installation.

Q: Can this motor be used as a direct replacement for a discontinued MKD or MDD Series Rexroth motor?
A: Cross-referencing from MKD/MDD to MSK requires verification of torque rating, feedback type, and shaft configuration. TOPNLMS technical support can assist with cross-reference validation prior to order placement. In many cases, an adapter coupling or feedback cable adapter is the only mechanical change required.

Q: How long does commissioning typically take after a like-for-like MSK motor replacement?
A: For a direct replacement with the same motor type, commissioning typically takes 1–3 hours including MDR upload, no-load test, and loaded axis verification. Cross-series upgrades may require additional tuning time depending on inertia ratio changes.

Warranty Assurance

Every Rexroth 1070089509-GA1 unit supplied by TOPNLMS is backed by a 12-month warranty covering manufacturing defects, encoder failure, winding insulation breakdown, and bearing failure under normal operating conditions. The warranty period begins from the date of shipment confirmation.

Pre-shipment testing includes: no-load motor run verification at rated speed, insulation resistance measurement (≥100 MΩ at 500V DC), encoder signal integrity check (A/B/Z channel verification for incremental types; absolute position readback for EnDat variants), and visual inspection of connector housings, shaft seal, and nameplate legibility.

Replacement support: In the event of a warranty claim, TOPNLMS will arrange priority dispatch of a replacement unit upon receipt and inspection of the returned motor. Advance replacement (ship-before-return) is available for qualified accounts with established purchase history.

After-sales response: Technical support is available via email and phone for commissioning assistance, cross-reference validation, and fault diagnosis. Response time for warranty inquiries is within 1 business day.

Procurement assurance: All units are sourced through verified supply channels with full traceability. Certificates of conformity and test reports are available upon request. Export documentation, including commercial invoice, packing list, and country-of-origin certificate (Germany), is provided as standard for international shipments.

For volume orders, scheduled delivery programs, and consignment stock arrangements, contact the TOPNLMS sales team directly to discuss terms.