WitMotion JY-ME01/JY-ME02 18-bit 360° Absolute Rotary Encoder Angle Sensor for robotics & automation (Modbus)
WitMotion JY-ME01/JY-ME02 18-bit 360° Absolute Rotary Encoder Angle Sensor for robotics & automation (Modbus)
WitMotion
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Overview
WitMotion JY-ME01 / JY-ME02 is an absolute rotary encoder angle sensor for 360° rotation angle measurement with 18-bit digital rotation angle measurement and memorized position. It supports Modbus mode (Modbus can read sensor data) and is designed for automation control applications such as robotics, 3D printers, and production equipment.
Key Features
- High Precision Angle Sensor: 18-bit high-precision rotation angle measurement with memorized position
- 360° Rotation Angle Measurement: 360° non-contact sensor, low rotation damping
- JUE Absolute Encoder functions: records number of working turns and current angle; each position code is unique and non-repetitive; origin can be set at any position
- No need to return to zero on power-up; no counting required; power-off memory available (no battery required)
- Single-turn mode and multi-turn mode supported; in multi-turn mode, turns can be counted; number-of-turns range: -32768 to 32767
- Support Modbus Mode; Support Serial Port ASCII Code (ASCII output is intuitive for checking data)
- Adopt 360° non-contact magnetic sensor; more resistant to vibration and impact than photoelectric encoders
- Aluminum housing: shields external magnetic field signal interference; can shield external electromagnetic signals
- Industry standard aluminum housing properties listed: shock-resistant, dust-resistant, moisture-resistant, oil-resistant
- Six advantages listed: Small size; Light weight; Low power consumption; Wide measuring range; Easy to install; Long service life
- Easy to install: adopting silicone soft cable; special interface is easy to connect
Specifications
Model: JY-ME01
| Voltage | 3.3~5V |
| Measuring range | 0~360° |
| Resolution | 18 BIT |
| Rotation speed | 25000 RPM |
| Operating temperature | -40~85°C |
| Size | 26mm*15mm |
JY-ME01 mechanical drawing markings
| Overall height | 26mm |
| Body height marking | 16mm |
| Top section marking | 7.5mm |
| Top thickness marking | 3mm |
| Body diameter | Ø15mm |
| Top view width marking | 15mm |
| Top view inner marking | 11mm |
| Mounting holes | 2X M2.0 |
Model: JY-ME02
| Supply voltage | Voltage (5V~36V) |
| Current | <25mA |
| Serial port baud rate | 4800~230400, default 9600 |
| CAN baud rate | 3K to 1M, default 250K |
| Data output rate (only valid for CAN) | 0.1Hz to 2000Hz (default 10Hz) |
| Operating temperature | -40~85°C |
| Output protocol | WIT private protocol; Modbus protocol |
| Housing | Aviation aluminum |
| Bearing material | Bearing steel |
| Spindle load | Axial 20N, radial 80N |
| Mechanical speed | 1000RPM |
| General protection level | Housing: IP54; shaft, bearing: IP65 |
| Vibration resistance | 10G |
| Shock resistance | 50G |
| Weight | 11g |
| Dimensions | 55.5mm*38mm*38mm |
JY-ME02 mechanical drawing markings
| Top diameter | Ø38 |
| Overall height | 55.5 |
| Vertical markings shown | 34; 21.5; 16.5; 15.5; 12 |
| Horizontal markings shown | 20; 8 |
| Shaft width markings shown | 5.5; 6 |
| Front holes | 3x Ø3 depth 6mm (Even distribution) |
| Additional front marking shown | 15 |
Measurement items (listed)
- Measure angle, angular velocity, rotation speed, and temperature
- Accuracy: linearity 0.1%; angular accuracy ±0.01 degrees
For pre-sales selection help (JY-ME01-TTL / JY-ME02-485 / JY-ME02-CAN) or wiring assistance, contact support@rcdrone.top or visit https://rcdrone.top/.
Connections / Wiring
JY-ME01 connection (6-pin)
| No. | Name | Description |
|---|---|---|
| 1 | VCC | Power line 3.3~5v |
| 2 | RX | RX serial port receiving line |
| 3 | TX | TX serial port sending line |
| 4 | NC | Reserved |
| 5 | NC | Reserved |
| 6 | GND | Ground line |
JY-ME02-485 wiring color definition
| Wiring color | Pin Name | Pin Definition |
|---|---|---|
| Red | VCC | Power supply (+5V~+36V) |
| Yellow | A | RS485 A |
| Green | B | RS485 B |
| Black | GND | Ground |
| White | ZERO | Angle reset (angle reset to zero if high level lasts for 500ms) |
Applications
- 3D printers
- Electronically controlled slide rail modules
- Automated production lines
- Transportation equipment
- Textile machinery
- Lifting machinery
- Pressure machinery
- Elevator automation
- Industrial robots
- Other automation control fields
Details
Designed for robotics and automation, the JY-ME01/JY-ME02 provides 18‑bit absolute angle feedback with position memory and Modbus readout.
Non‑contact sensing enables full 0–360° measurement with low drag for responsive motion control.
Absolute position is retained through power cycles, with support for single‑turn and multi‑turn operation.
Modbus communication makes it easy to poll live angle data and monitor operating values in a controller or PC tool.
A flexible silicone cable and keyed connector simplify integration into embedded and industrial control wiring.
Mechanical dimensions and key electrical specs for JY‑ME01 are provided for fit checks and enclosure planning.
JY‑ME02 specifications cover supply range, interfaces, protection level, and load limits for automation deployments.
RS485 wiring is clearly mapped by color, including the ZERO line used for angle reset when held high.
A Type‑C evaluation board supports quick bench testing with status indicators for transmit and receive.
The compact encoder module ships with a cable and connector for straightforward installation in tight builds.
The WitMotion JY-ME01/JY-ME02 encoder kit includes the shafted sensor, an evaluation board, and a USB-C cable for setup and testing.
