# Electrical Installation

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**Safety First:** Do not perform wiring while the unit is energized. Before any wiring work, turn off the power and disconnect the power supply.
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![](https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/53AfTLeNrHwTJnbu2VH1/image)

**6-Pin Quick Connector Pin Definition**

* Connect the supplied cable to the power supply and the required communication interfaces. Unused wires must be insulated with protective material to prevent electric leakage or short circuits.
* Before opening the unit or performing any wiring, turn off the power and disconnect the power supply.
* Due to space limitations, the label on the side of the unit and the following diagrams show **wire pin definitions only**.
* The 6-pin quick connector wire color assignments are defined as follows:

<table data-full-width="false"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td>1</td><td>Brown</td><td>24 VDC (+)</td></tr><tr><td>2</td><td>Black</td><td>RS485 (B-)</td></tr><tr><td>3</td><td>Green</td><td>RS485 (A+)</td></tr><tr><td>4</td><td>Orange</td><td>NPN output (+)</td></tr><tr><td>5</td><td>Purple</td><td>4~20mA (+)</td></tr><tr><td>6</td><td>Blue</td><td>0 VDC (-)</td></tr></tbody></table>

### 24V DC Power Wiring Diagram

* **Brown wire**: 24 VDC (+)
* **Blue wire**: 0 VDC (–)

<div align="left"><figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FjnttycYvDKITQpLvLyOz%2F%E6%88%AA%E5%9C%96%202026-01-21%20%E4%B8%8A%E5%8D%8811.57.06.png?alt=media&#x26;token=84511492-c2c2-40de-bc4c-32120bf239f7" alt="" width="563"><figcaption></figcaption></figure></div>

### 4–20 mA Analog Output Wiring Diagram

* **Brown wire**: 24 VDC (+)
* **Blue wire**: 0 VDC (–)
* **Purple wire**: 4–20 mA (+)

<div align="left"><figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FbXIYS3h0C9Y2g5lEFLzh%2F%E6%88%AA%E5%9C%96%202026-01-21%20%E4%B8%8A%E5%8D%8811.57.16.png?alt=media&#x26;token=10045212-96c5-451d-8f3d-2ecf019fced6" alt="" width="563"><figcaption></figcaption></figure></div>

### **NPN Output Wiring Diagram**

* **Brown wire**: 24 VDC (+)
* **Blue wire**: 0 VDC (–)
* **Orange wire**: NPN Output (+)

<div align="left"><figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FrPv7yFFEqgtw02gxjGU7%2F%E6%88%AA%E5%9C%96%202026-01-21%20%E4%B8%8A%E5%8D%8811.57.26.png?alt=media&#x26;token=c1ea6ba2-e12e-45f8-bf0d-fe11f74ba492" alt="" width="563"><figcaption></figcaption></figure></div>

### **RS-485 Two-Wire Wiring Diagram**

* **Black wire**: RS-485 B (–)
* **Green wire**: RS-485 A (+)

<div align="left"><figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2F5RkUSUAPuAxc4xbYHVre%2Frs475%20wire.png?alt=media&#x26;token=aaf94015-d6c6-48b2-adb3-e4a50f47c541" alt="" width="563"><figcaption></figcaption></figure></div>

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#### RS-485 Wiring Recommendations

* It is recommended to use **shielded 24 AWG twisted-pair cable** and connect devices in a **daisy-chain configuration**. Do not use star or ring wiring.
* For long cable runs, install **termination resistors** at both the master and the farthest device. A typical value is **120 Ω**, but the actual value should be calculated based on the cable specifications.
* If signal instability occurs, consider adding **bias resistors** at a point along the line.
* For the supplied 6-core cable, when used for RS-485 communication, **trim excess length** to minimize noise interference. Connect the shield braid to the main communication wires and **ground it**.
* In areas with heavy signal interference, the software may need to **poll multiple times** to receive a response. Implement a **repeated polling mechanism** in the communication program to distinguish between signal interference and actual device offline conditions.
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