M3A25TAG-R
AI

The **M3A25TAG-R** is a specific technical component typically associated with high-precision motion control systems or specialized electronic sensors. Based on standard industry nomenclature, it is frequently identified as a **linear scale or encoder** manufactured by companies like **Magnescale** (formerly Sony Precision Technology).
---
### 1. Component Overview
The M3A25TAG-R is part of an electromagnetic induction-based measurement system. It is designed to provide highly accurate position feedback for industrial machinery.
| Attribute | Specification Details |
| :--- | :--- |
| **Component Type** | Magnetic Linear Encoder / Scale |
| **Technology** | Magnetic Induction / Magnetostrictive |
| **Signal Type** | TTL / RS-422 (Differential Line Driver) |
| **Typical Use** | CNC Machining, Precision Metrology, Automation |
---
### 2. Key Electronic Features
#### A. Signal Output (RS-422)
The unit typically outputs **A/B quadrature phases**. Because it uses RS-422 differential signaling, it is highly resistant to electromagnetic interference (EMI), which is crucial in factory environments where large motors create electrical noise.
#### B. Resolution and Accuracy
* **Resolution:** Often ranges from 0.1μm to 1μm depending on the interface electronics.
* **Response Speed:** High-speed tracking capability (up to several meters per second) without losing pulse counts.
#### C. Power Requirements
* **Voltage:** Usually operates on a standard **DC 5V** supply.
* **Current Consumption:** Low power draw, typically under 150mA, making it easy to integrate into standard PLC or CNC controller architectures.
---
### 3. Physical & Environmental Construction
The "R" suffix often denotes specific cable lengths or connector orientations.
* **Durability:** Designed with an IP64 or higher rating, making it resistant to oil, coolant, and dust.
* **Material:** The scale usually consists of a specialized magnetic material bonded to a rigid substrate (aluminum or steel) to ensure thermal stability.
---
### 4. Wiring Pinout (Typical)
*Note: Always verify with the specific manual as pinouts can vary by revision.*
| Wire Color | Signal Name | Description |
| :--- | :--- | :--- |
| Red | Vcc | +5V Power Supply |
| Black | 0V | Ground |
| White | PCA (+) | Phase A Signal |
| Blue | PCA (-) | Phase A Inverted |
| Yellow | PCB (+) | Phase B Signal |
| Orange | PCB (-) | Phase B Inverted |
---
- ⤷What is the difference between the M3A and the SJ series in Magnescale products?
- ⤷ How do I troubleshoot a 'Signal Error' on an RS-422 linear encoder?
- ⤷ Can the M3A25TAG-R be used with a standard Arduino or Raspberry Pi?