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Kollmorgen MAG05-25041-00
Model Number: MAG05-25041-00
Product Introduction:
The MAG05-25041-00 is a high-resolution magnetic absolute encoder from Kollmorgen’s MAG product line. It uses magnetic sensing technology (Hall-effect or magnetoresistive) to read a multi-pole magnetic ring, providing absolute position feedback without contact. This encoder is designed for harsh environments where optical encoders would fail due to dust, oil, vibration, or moisture.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Encoder Type | Magnetic Absolute (multi-turn) |
| Resolution (Single-Turn) | 25041 counts/rev (approx. 14.6 bit effective) |
| Multi-Turn Range | Up to 4096 turns (12-bit multi-turn) |
| Total Resolution | 25041 × 4096 = 102,567,936 counts (approx. 26.6 bit effective) |
| Interface Protocol | BiSS-C (primary), EnDat 2.2 (optional) |
| Supply Voltage | 5 V DC ± 5% |
| Operating Temperature | -40°C to +125°C |
| IP Rating | IP67 / IP69K (with appropriate housing) |
| Shaft Diameter | 5 mm hollow bore (or solid shaft variant) |
| Magnetic Ring Pole Count | 256 poles (for 25041 resolution variant) |
| Update Rate | Up to 10 kHz (BiSS-C) |
| Latency | < 50 μs (typical) |
| Accuracy (Absolute) | ±0.1° (typical, 360° range) |
| Repeatability | ±0.01° (typical) |
| Weight | ~45 g (encoder head only) |
| Housing Material | Stainless steel 316L (standard) or aluminum (optional) |
Structural Characteristics:
- Non-contact magnetic sensing — no wear, infinite mechanical life
- Sealed encoder head — no optical window to contaminate
- Magnetic ring (target) is a separate component — mounted on motor shaft
- Hollow shaft design — allows cable/tube routing through encoder center
- M12 or M23 connector for signal output
- Integrated temperature compensation circuitry
Working Principle:
A multi-pole magnetized ring (target) is mounted on the motor shaft. The encoder head contains an array of Hall-effect or magnetoresistive sensors that read the magnetic field pattern. The electronics decode the field pattern into an absolute angle value for each revolution. A separate coarse counter tracks the number of revolutions, enabling multi-turn absolute position. The data is transmitted via BiSS-C or EnDat 2.2 to the servo drive.
Advantages:
- Immune to dust, oil, water, vibration — no optical components
- Infinite mechanical life — no contact, no wear
- Absolute position on power-up — no homing sequence required
- Wide temperature range: -40°C to +125°C — far exceeds optical encoders
- Higher resolution than most resolvers at lower cost
Applicable Industries:
Off-highway vehicles, mining equipment, food & beverage (washdown), steel mills, paper machines, wind turbines, marine propulsion, outdoor robotics
Installation Requirements:
- Magnetic ring (target) mount tolerance: Concentricity < 0.02 mm, axial runout < 0.05 mm
- Air gap between target and sensor: 0.5 mm to 1.5 mm (critical — do not exceed 2.0 mm)
- Encoder head mounting: Use 2× M3 set screws at 180° — torque 0.5 Nm max
- Cable routing: Shielded twisted pair, minimum bend radius 30 mm
- Do not expose to magnetic fields > 50 mT from external sources
Usage Notes:
- Air gap is the most critical parameter — incorrect gap causes position errors or signal loss
- Do not machine or demagnetize the target ring — permanent damage
- Verify multi-turn counter resets correctly after 4096 turns
- Use Kollmorgen Workbench MAG Configurator for resolution and protocol setup
