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KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW Bosch Rexroth Indramat

MPN: R911320573

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The Bosch Rexroth Indramat KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW is a motor-integrated servo drive from the KSM Motor Integrated Servo Drives series with a hybrid connector and uses natural convection cooling. It features an optical Hiperface encoder with multi-turn absolute technology, offers a shaft with keyway, and operates at a supply voltage of DC 750 V. This model does not include a holding brake and uses the SERCOS 2 communication protocol.

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Product Description:

The KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW is a motor-integrated servo drive produced by Bosch Rexroth Indramat for the KSM Motor Integrated Servo Drives series. By merging drive electronics and a synchronous motor inside one enclosure, it supplies decentralized motion control to conveyors, pick-and-place heads, and compact gantries where external cabinets are impractical. This integrated layout reduces external wiring and places the power stage close to the axis for compact machine designs.

This unit is wired through a Hybrid Connector that carries power, feedback, and fieldbus lines in a single plug, simplifying installation on moving axes. Heat is removed by natural convection, so no fans or liquid circuits are required when the drive operates in its specified mounting orientation. The design is the standard option and corresponds to design version 2 within series 1, giving it the baseline mechanical features of the family. Size 041 and motor length C set the frame envelope used when matching to gearboxes or direct-drive shafts, while the performance level is basic. Position feedback uses a Hiperface interface, and optical scanning produces 128 signal periods per mechanical turn to deliver fine resolution to the controller. Command and diagnostic data are exchanged over SERCOS 2 (RS422), allowing deterministic timing on multi-axis networks.

The optical encoder supplies multi-turn absolute position data, so the axis reports its position after a power cycle without a homing move. The drive is powered from a shared DC bus at DC 750 V, which lets several KSM modules regenerate energy back to a central supply. A hardened shaft with a keyway transfers torque, and an integral shaft seal helps prevent grease or coolant ingress during washdown. The winding code is 42, which matches the motor's electrical constants to the specified supply voltage. This version is delivered without a holding brake, so static load retention must be provided externally.

Connection Type
Hybrid Connector
Cooling Type
Natural convection
Design Option
Standard
Design Version
2
Encoder Interface
Hiperface
Encoder Resolution
128 signal periods
Encoder Technology
Optical
Encoder Turn Type
Multi-turn absolute
Holding Brake
Without holding brake
Master Communication Protocol
SERCOS 2 (RS422)
Motor Length
C
Motor Size
041
Performance Level
Basic
Product Type
Motor-Integrated Servo Drive
Safety Technology
Without safety technology
Series
1
Shaft Seal
Yes
Shaft Type
Shaft with keyway
Supply Voltage
DC 750 V
Winding Code
42
  • KSM012B041C42NM1HP0SENND7NNFW
  • KSMO1.2B-O41C-42N-M1-HPO-SE-NN-D7-NN-FW
  • KSM01.2B 041C 42N M1 HP0 SE NN D7 NN FW
  • KSM1.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW
Fault / Error Code What it Means Trouble Shooting Step
F218 In-drive heat-sink temperature above shutdown limit Improve cabinet / machine airflow, clean the motor-side blower, wait until < 45 °C, then issue a Class 1 Reset before re-enabling.
F219 Motor stator sensor reports over-temperature (≈ 155 °C) Reduce duty cycle or load, verify that the motor housing is free of dust/oil, allow full cool-down, then reset.
F226 DC-bus undervoltage detected while still enabled Check the IndraDrive Mi hybrid-cable supply for loose connections or brown-outs, ensure Drive Enable drops before mains contactor opens, restore supply and reset.
F227 DC-bus over-voltage during braking Lengthen decel ramps in PLC, add / up-size braking resistor in the Mi chain, clear fault when bus ≤ 730 V.
F8022 Encoder-1 signals incorrect (noise, shielding, or encoder fault) Reseat / replace hybrid cable, keep it away from motor power cabling, swap encoder if error repeats.
F8028 Over-current in the power stage (IGBT trip) Inspect motor phases for shorts, verify current limits in parameters, test IGBT module if fault is repeatable.
F8064 Open phase in motor winding (one phase missing) Check hybrid cable crimps at both ends, meg-test motor windings, repair broken conductor then reset.
F8070 +24 V control-supply undervoltage Measure the 24 V rail on X31 of the supply unit, tighten terminals, up-size PSU if it dips below 22.8 V.
F8135 Velocity threshold exceeded (trend monitoring) Verify mechanical load hasn’t jammed, retune speed loop, check gear-ratio parameters, then clear fault.
F8140 Controller memory error – parameters invalid Reload saved parameter file, or re-flash firmware via IndraWorks; power-cycle to complete the process.
Model Continuous Current (A) Peak Current (A) Rated Speed (rpm) Brake Field-Bus Interface Typical Mass (kg)
KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW 7.5 22 4 500 No SERCOS III ≈ 8.3
KSM01.1B-041C-42N-M1-HP0-SE-NN-D7-NN 7.5 22 4 500 No SERCOS III ≈ 8.3
KSM02.1B-035C-42N-M1-HP0-SE-NN-D7-NN 12 36 4 500 No SERCOS III ≈ 9.4
KSM02.2C-072C-42N-M1-HP0-SE-NN-D7-NN 16 48 3 000 No SERCOS III ≈ 12.0
KSM03.1B-060C-42N-M1-HP0-SE-NN-D7-NN 24 72 3 000 No SERCOS III ≈ 16.8
KSM01.2B-041C-42N-M1-HP0-RS-NN-D7-NN 7.5 22 4 500 No EtherNet/IP (RS) ≈ 8.3
Error Code Meaning
F218 Drive-amplifier heatsink over-temperature shutdown
F219 Motor over-temperature shutdown (thermistor trip ≈ 155 °C)
F226 DC-bus undervoltage detected while drive is enabled
F8022 Encoder 1 signals incorrect (cable/shielding or encoder fault)
F8025 Over-voltage in power section (regen energy too high)
F8028 Over-current in power section (IGBT trip)
F8057 Device overload shutdown – supply or drive exceeded thermal/elec. limits
F8064 Interruption of motor phase – open phase or broken conductor
F8070 +24 V DC control-supply undervoltage
F8091 Power section defective – internal hardware monitor trip

Frequently Asked Questions about KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW:

Q: What type of electrical connection does this servo drive utilize?

A: The KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW uses a hybrid connector for its electrical connection.

Q: What encoder features are present on the KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW servo drive?

A: This model is equipped with a Hiperface optical encoder with 128 signal periods and multi-turn absolute capability.

Q: How is the KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW motor-integrated servo drive cooled?

A: The KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW operates with natural convection cooling without the need for external fans.

Q: What shaft design is provided on this Bosch Rexroth Indramat servo drive?

A: The shaft on this model features a keyway and includes a shaft seal for mechanical security and protection.

Q: What supply voltage does the KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW require?

A: This unit operates on a supply voltage of DC 750 V as specified in the technical details.


Internal Product Review

  • ‘‘The KSM01.2B-041C-42N-M1-HP0-SE-NN-D7-NN-FW is a Bosch Rexroth Indramat motor-integrated servo drive with a clean, application-friendly design. Natural convection cooling and a hybrid connector support straightforward installation and dependable thermal behavior in compact machine assemblies. The optical encoder and SERCOS 2 (RS422) communication give the unit precise feedback and disciplined network integration, a strong combination for servo applications.’’

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