MAR-M700A
Multi-Turn Absolute Encoder
Multi-turn model incorporating predictive maintenance function to minimize the risk of sudden failure-induced shutdowns
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. Incorporates predictive maintenance function
The encoder incorporates a new predictive maintenance function based on the compatible communication standard (A-format®)*. This allows early detection of potential failures and provides advance notification of the need for parts replacement and maintenance timing for industrial robots, helping to minimize the risk of sudden failure-induced equipment shutdowns.
- *A-format® is a registered trademark of Nikon Corporation.
2. Incorporates proprietary angle accuracy self-correction function
It also features the proprietary Nikon angle accuracy self-correction function. This allows accuracy corrections without the need for a reference encoder*, helping to ensure improved operational stability and greater motion precision.
- *A master encoder used to ensure the accuracy (position information) of the target encoder
3. Interchangeable with existing models
Interchangeable with existing Nikon absolute encoders, it can be installed without the need to make design changes in mounting parts.
Specifications
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| Model | MAR-M700A | |
|---|---|---|
| Resolution | Single-turn | Max. 27 bit (134,217,728 positions/rev.) |
| Multi-turn signal | Max. 16 bit (65,536 revolutions) | |
| Responsive revolution speed | With mains power | 8,000 min-1 |
| With backup battery | 8,000 min-1 | |
| Power source voltage | With mains power | 5 V DC (±10%) |
| With backup battery | 3.6 V DC | |
| Current used | During normal operations | 120 mA (TYP) |
| Using external battery | 55 μA (TYP) | |
| Operating temperature range | ‒20 to +105°C | |
| Moment of inertia for shaft | 3.9 × 10-8 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 | |
| Memory access development space | 3,750 bits (240 × 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 | 12.48 mm (TYP) | |
Dimensional Drawings
