MAR-M50A
Multi-Turn Absolute Encoder
Nikon flagship M50 Series Multi-Turn Absolute Encoder model
Nikon absolute encoders (rotary encoders) incorporate proprietary optical and M-sequence absolute pattern technologies to combine high reliability with compact dimensions. Used in a broad range of industrial machinery, including industrial robots for automotive production lines and machine tools, they have won widespread acclaim as standard sensors capable of detecting the rotational displacement of robot arms and other equipment as absolute values.
Features
1. Ultra-thin construction based on reflective optics
Uses proprietary Nikon optical design to achieve a thickness in the range of 12 mm. The thickness is less than half that of conventional transmissive encoders.
2. High resolution
Provides up to 24-bit resolution.
3. High operating temperatures
Guaranteed operating temperatures up to 95°C. Outstanding heat resistance and improved heat dissipation characteristics
Applications
- Ideal for the small AC servo motors used in compact industrial robots, service robots, mounters, and other equipment
Specifications
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| Model | MAR-M50A | |
|---|---|---|
| Resolution | Single-turn | 20 bit (1,048,576 positions/rev.) Optional: 22 bit, 24 bit |
| Multi-turn signal | 16 bit (65,536 revolutions) | |
| Responsive revolution speed | With mains power | 6,000 min-1 |
| With backup battery | 10,000 min-1 | |
| Power source voltage | With mains power | 5 V DC |
| With backup battery | 3.6 V DC | |
| Current used | During normal operations | 65 mA (TYP) |
| Using external battery | 30 μA (TYP) | |
| Operating temperature range | Models without electric double layer capacitor | ‒20 to +95°C |
| Models with electric double layer capacitor | ‒20 to +85°C | |
| Moment of inertia for shaft | 3.25 × 10-7 kg·m2 | |
| Allowed rotational angular velocity | 1.0 × 105 rad/sec2 | |
| Communication protocol | A-format® | |
| Transmission standard | EIA standard RS-485 compliant | |
| Transmission method | NRZ half-duplex serial communications | |
| Baud rate | 2.5 Mbps (Optional: 4 Mbps to 16 Mbps) | |
| Number of signal wires | 4 (Optional: 6) | |
| Memory access development space | 3,840 bits (240 addresses × 16 bits) | |
| Temperature sensor | Supported | |
| Bus connectivity | Supported | |
| Bus connectivity options | Encoders can be connected for up to 8 axes. | |
| Dimensions | External diameter (⌀) | 35 mm |
| Height | 12.74 mm (TYP) | |
Dimensional Drawings
