REXROTH KSM01.2B-061C-35N-M1-HP2-SE-NN | IndraDrive Mi Distributed Servo Drive

Description

Key Technical Specifications

Product Introduction

I’ve seen too many “KSM01 replacements” show up on site with the right family name and the wrong option codes. The REXROTH KSM01.2B-061C-35N-M1-HP2-SE-NN is a Bosch Rexroth IndraDrive Mi distributed servo drive, meaning the drive electronics and the synchronous servo motor are packaged together as one unit. In the field, that usually shows up on machines where cabinet space is tight, wiring runs need to stay short, or the design puts the drive right next to the axis it controls.What makes this part worth tracking carefully is that it is not just a motor. It is a powered drive node. That means you have to match more than frame size. You also have to match the DC-bus supply range, firmware expectations, connector options, encoder/feedback setup, holding-brake configuration, and IndraDrive Mi network settings. A unit that bolts on perfectly can still refuse to run if the firmware, option codes, or drive parameters do not line up with the existing system.

Quality SOP & Tech Pitfalls

The Lab Report — Pre-Shipment SOP

A proper pre-shipment check for KSM01.2B-061C-35N-M1-HP2-SE-NN should include:

1. Visual and counterfeit check
   • Confirm Bosch Rexroth branding.
   • Confirm the full part number, including dashes and option codes.
   • Look for reprinted labels, uneven fonts, tampered rating plates, or suspicious date codes.
2. Nameplate verification
   • Record the complete model string.
   • Record serial number, hardware revision, firmware version, voltage ratings, and connector option codes.
   • Compare the nameplate against the removed unit and the purchase order.
3. Physical inspection
   • Check the motor shaft, flange, centering collar, and mounting holes.
   • Inspect connectors for bent pins, cracked housings, corrosion, or loose locking hardware.
   • Check the cable entry points, seals, and drive housing for impact damage or moisture ingress.
4. Mechanical check
   • Rotate the shaft by hand if safe and permitted.
   • Confirm it does not bind, grind, or show abnormal bearing noise.
   • If the unit has a holding brake, verify that the brake behavior matches the application requirement.
5. Live functional test on a compatible IndraDrive Mi test setup
   • Apply only the correct rated supply.
   • Check boot sequence, diagnostic LED behavior, drive recognition, and communication status.
   • Do not assume “LED lights up” means the drive is fully functional.
6. Insulation and multimeter checks
   • Use a calibrated multimeter such as a Fluke 115 or equivalent.
   • Check for shorts, open circuits, abnormal leakage, or damaged isolation paths where applicable.
   • Do not apply high-potential or insulation tests unless the Rexroth manual explicitly permits it for that unit.
7. Firmware and option-code logging
   • Record firmware version, diagnostic IDs, connector option codes, and any project identifiers.
   • Compare against the existing IndraDrive Mi system before approving installation.
8. Anti-static packing and shipping protection
   • Pack in anti-static material.
   • Protect connectors, shaft, flange, centering collar, and housing seals from dust, moisture, and mechanical damage.

The Engineer’s Warning — Real Field Pitfalls

Pitfall 1: Treating KSM01.2B-061C-35N as a complete match without checking the suffixes.
The base model tells you the family and size class. The suffix blocks like M1-HP2-SE-NN define connector, feedback, brake, sealing, and option differences. Swap those wrong, and you can end up with a unit that fits mechanically but fails during commissioning.Pitfall 2: Ignoring firmware and IndraDrive Mi project configuration.
A replacement KSM01 may power up and still not run correctly if the firmware version, drive parameters, axis configuration, or network settings do not match the existing system. I’ve seen sites blame the replacement hardware when the real issue was a missing project backup or a drive that had not been commissioned to the machine.Pitfall 3: Forgetting the DC-bus supply and connector pinout.
KSM01 units are distributed drive modules. They depend on the correct DC-bus voltage, supply sequencing, communication cabling, and connector seating. Wrong supply, damaged pins, or a loose connector can damage the unit or create intermittent faults that are painful to chase.

Installation & Configuration Guide

30-Minute Swap Guide

1. Pre-Installation Safety ⚠️
   • Confirm the correct isolation procedure for the IndraDrive Mi system, DC-bus supply, motor power, and field wiring.
   • Lock out/tag out power where required.
   • Wait for DC-bus capacitors to discharge before touching terminals or connectors.
   • Verify the replacement unit is REXROTH KSM01.2B-061C-35N-M1-HP2-SE-NN and matches the removed unit.
2. Document the Existing Setup ⚠️
   • Take clear photos of:
     • Full nameplate
     • Mounting position
     • Flange and shaft orientation
     • Connector positions and cable labels
     • Address selector switches, if present
     • LED status before removal
   • Record firmware version, serial number, axis name, network address, and IndraDrive Mi project references.
3. Removal
   • Label every cable before disconnecting.
   • Remove power, communication, and feedback cables carefully to avoid damaging pins.
   • Support the unit before releasing mounting screws.
   • Do not force the flange or centering collar. If it resists, check for alignment pins, sealing rings, or mechanical interference.
4. Installation
   • Copy all address settings, connector assignments, axis parameters, and configuration references from the old unit before installing the new one.
   • Clean the mounting surface and check the centering collar.
   • Seat the unit evenly and tighten mounting screws to the correct torque in the proper sequence.
   • Reconnect cables exactly as labeled.
   • Confirm connector orientation, shielding, grounding, and strain relief before closing the enclosure.
5. Power-On & Testing
   • Restore power only after a visual check.
   • Verify DC-bus supply voltage at the drive input.
   • Watch the diagnostic LED for normal boot and drive-ready status.
   • Check drive recognition in the IndraDrive Mi system.
   • Confirm axis parameters, communication status, brake control if applicable, and motion behavior.
   • Perform a controlled jog and function test before returning the machine to full production.

Compatible Replacement Models

Frequently Asked Questions

Can I hot-swap REXROTH KSM01.2B-061C-35N-M1-HP2-SE-NN?

No. This is a powered distributed servo drive unit with DC-bus and motor connections. Removing or installing it on a live system can damage the drive, disturb other axes, or create dangerous motion. Plan a controlled shutdown unless the Rexroth documentation and your system design explicitly allow otherwise.

Is any KSM01.2B-061C unit interchangeable with this one?

Not automatically. The KSM01.2B-061C size class is only part of the identity. The suffix codes, firmware version, connector options, holding-brake configuration, and IndraDrive Mi project settings all matter. Two units that look similar can still behave differently.

What happens if the firmware does not match?

You might get normal operation. You might also get drive faults, communication errors, failed axis recognition, incorrect brake behavior, or a unit that powers up but will not run the existing program. Always record the old unit’s firmware before removal.

Can I use this KSM01 in a non-IndraDrive Mi system?

Not as a direct replacement. The KSM01 is designed for the Rexroth IndraDrive Mi distributed drive environment. It is not a generic servo drive for arbitrary PLCs, VFDs, or motion controllers. Compatibility depends on the IndraDrive Mi system, firmware, and project configuration.

What should I check before powering it up?

Check the full nameplate, mounting position, flange alignment, connector condition, cable labels, DC-bus supply voltage, firmware version, and IndraDrive Mi project match. Then verify that the drive boots, is recognized by the system, and shows normal diagnostic status before enabling motion.

Is a 1-year warranty enough to trust this spare?

A warranty helps, but it does not replace verification. Before installation, you still need nameplate confirmation, physical inspection, firmware matching, connector verification, and IndraDrive Mi system validation. The warranty covers failure after delivery; proper QA prevents failure during commissioning.

What if the unit looks new but has no project or firmware information?

Treat it as unverified hardware. A new or surplus KSM01 without firmware details, option codes, or test records is not ready for production. Request the full nameplate photo, firmware version, connector option codes, and any inspection or test documentation before installing it.