---
title: "X7 RS485 port"
slug: "x7-rs485-port"
updated: 2024-07-04T11:00:20Z
published: 2024-07-04T11:00:20Z
canonical: "docs-linescan.alliedvision.com/x7-rs485-port"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs-linescan.alliedvision.com/llms.txt
> Use this file to discover all available pages before exploring further.

# X7 RS485 port

The following connector is required:

- Würth Elektronik 691 325 110 005

The following counterpart is required:

- Würth Elektronik 691 364 100 005

| pin | name | description |
| --- | --- | --- |
| 1 | RT1 | RS485 |
| 2 | RTN1 | RS485 |
| 3 | RT2 | RS485 (internally connected to RT1) |
| 4 | RTN2 | RS485 (internally connected to RTN1) |
| 5 | GND |  |

Use this interface to connect several XLC4 control units to a single bus line. The XLC4 control unit uses 2 wire RS485 operation.

> [!NOTE]
> NOTE
> 
> The XLC4 control unit has no integrated bus termination resistors for the control unit at the end of the line.
> 
> Connect a resistor of 120 Ω to RT2 and RTN2.
> 
> For more information refer to [RS485 Bus configuration](/v1/docs/rs485-bus-configuration)