Kolmorgen AKM31C-RNS2LB03 Servo Motor Detailed Product Description

I. Complete Model Analysis

AKM31C Main Body

AKM: Kolmorgen Standard Permanent Magnet Synchronous Servo Motor Series

3: 3-slot base → 90mm IEC B5 Circular Flange / 85mm NEMA 34 Square Flange

1: Stator Stack Length 1 → Short Body, Low Inertia, High Speed Version

C: C-Class High Voltage Winding, Suitable for Three-phase 400~480V Power Grid, DC Bus 640V DCKollmorgen

Configuration Code RNS2LB

R: Installation → IEC B5 Circular Flange (90mm)

N: Shaft Type → Smooth Shaft without Keyway, Shaft End with M8 Fixed Thread Hole

S: Feedback → EnDat 2.2 Multi-Loop Absolute Encoder (24-bit Single Loop + 12-bit Multi Loop)

2: Brake → 24V DC Power-off Electromagnetic Brake (Self-locking when power off, Release when powered on)

L: Outlets → M23 Rotatable Connector (Integrated Power + Feedback in a Single Socket)

B: Special Configuration → Shaft End with Oil Seal, IP65 Full Machine Protection, Reinforced Temperature-Tolerant Winding

Suffix 03

Factory Customization: Industrial-grade Heavy-duty Bearings, Extended Shaft Extension, Low Temperature Rise Optimization, CE/UL Certification Enhancement

II. Core Electrical Parameters

Continuous Start Torque: 6.0 N·m

Rated Torque: 4.8 N·m

Peak Torque: 24.0 N·m (4 Times Overload)

Rated Power: 3.0 kW (640V DC Bus)

Maximum Speed: 7000 rpm

Rated Current: 6.8 A RMS

Peak Current: 27.2 A RMS

Winding Resistance (Line-to-Line): 1.05 Ω @ 25℃

Winding Inductance (Line-to-Line): 4.2 mH

Rotor Inertia: 1.2 × 10⁻⁴ kg·m²

Insulation Class: F-Class (155℃)

Compatible Voltage: Three-phase 400/480V AC, Bus 640V DCKollmorgen

III. Feedback System (EnDat 2.2 Multi-Loop Absolute)

Type: EnDat 2.2 Pure Digital Multi-Loop Absolute Encoder

Single Loop Resolution: 24 bits (16,777,216 ppr)

Multi-Loop Range: 4096 Loops (12 bits)

Communication Protocol: EnDat 2.2 High-Speed Serial

Power Supply: 5V DC, 180mA

Characteristics: Read Absolute Position upon Power On, No Zero Return Required, Strong Anti-Interference, Supports Long Distance Wiring

Compatible: Kolmorgen AKD/AKD2G, Siemens, Beffro, Beckhoff, etc. Mainstream Drives

IV. Mechanical Structure Specifications

Installation Flange: IEC B5 Circular (90mm), 6×M6 Installation Holes

Shaft Diameter: φ16mm, Smooth Shaft without Keyway

Shaft Extension Length: 25mm (Extended Type, Suffix 03 Customized)

Shaft End: With M8 Threaded Fixed Hole, Shaft End Oil Seal

Connection Method: M23 Rotatable Integrated Socket (Power + Feedback Integrated)

Brake Parameters: 24V DC, 0.8A, Static Torque ≥ 7.2 N·m, Power-off Self-locking

Protection Grade: IP65 (Whole Machine, Including Shaft End Oil Seal)

Weight: Approximately 4.2 kg

Bearings: Heavy-duty Double Bearings, Lifelong Lubrication

Vibration / Shock: Industrial Grade: 15g / 75g

V. Environment and Certification

Operating Temperature: -20℃～+40℃ (No Capacity Reduction)

Storage Temperature: -30℃～+85℃

Humidity: 5%～95% RH, No Condensation

Certification: CE, UL, cULus, RoHS, CSA

VI. Core Product Features 3rd frame short stack high-speed rotation

1st short stack design, low inertia, high dynamics, 7000rpm maximum speed, suitable for high-speed precise positioning.

480V high-voltage C winding

Compatible with industrial three-phase 400/480V power grid, low line loss over long distances, high system efficiency, large power density - Kollmorgen.

EnDat 2.2 high-precision absolute value

24-bit ultra-high resolution, multi-loop memory, power-on zero reset, suitable for precise assembly lines, robots, semiconductor equipment.

IEC B5 circular flange

European standard interface, strong versatility, stable installation, convenient equipment replacement.

Optical shaft without key slot + shaft end oil seal

Optical shaft compatible with elastic coupling, smooth transmission without stress; IP65 full protection, dustproof and splash-proof, suitable for harsh environments.

M23 rotatable integrated connector

360° free wiring, single socket simplifies wiring, anti-vibration, efficient maintenance.

24V power failure electromagnetic brake

Self-locking when power is off, safe and reliable, preventing vertical axis from sliding, suitable for lifting, flipping, vertical load scenarios.

Suffix 03 heavy-duty customization

Extended shaft extension, heavy-duty bearings, low temperature rise optimization, suitable for 24-hour continuous heavy-duty operation.

Seven, driver compatibility

Kollmorgen: AKD-P02407, AKD-P03607, AKD2G 480V series

Third-party: Siemens SINAMICS S210, Beihangel AX5000, B&R ACOPOS, Schaeffler IndraDrive

Supported protocols: EnDat 2.2, EtherCAT, PROFIdrive, CANopen

Eight, typical applications

Industrial robots, manipulators, automated production lines

Numerical control equipment, precision platforms, laser processing, electronic manufacturing

Packaging machinery, printing equipment, material handling, medical devices

Semiconductor equipment, testing instruments, IEC B5 flange, high-voltage power supply, high-speed high-precision, vertical axis with brake scenario

Nine, one-sentence summary of model

AKM31C-RNS2LB03:

IEC B5 circular flange, 3rd frame short stack high-speed rotation, 480V high-voltage, optical shaft without key, EnDat 2.2 multi-loop absolute value, 24V electromagnetic brake, M23 rotatable integrated connector, IP65 full protection, extended shaft extension heavy-duty customization servo motor;

Core positioning: high speed, high precision, high reliability, industrial-grade heavy-duty, vertical axis safety, power-on zero reset, strong environmental adaptability.