---
title: "RS485 Bus configuration"
slug: "rs485-bus-configuration"
updated: 2024-07-04T11:06:55Z
published: 2024-07-04T11:06:55Z
canonical: "docs-linescan.alliedvision.com/rs485-bus-configuration"
---

> ## 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.

# RS485 Bus configuration

Several XLC4 control units can be connected to a single RS485 control bus.

| Serial configuration | Value |
| --- | --- |
| Baud rate | 115200 |
| Data bits | 8 |
| Stop bits | 1 |
| Parity | None |

![](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/image(15).png)Electrical setup for RS485 operation

To access a dedicated XLC4 control unit in the bus, program individual device IDs for each bus member. (Factory default is ID=1). Use the command ID.

If accessing a selected XLC4 device in the RS485 bus, each command has to be preceded by an address qualifier. An address qualifier is preceded by a ‘#’ sign. Valid device IDs are in the Range from 1 to 15 (hexadecimal #1 to #F). A command with the address qualifier #0 is accepted from all XLC4 control units in the bus, independent of their individual device ID.

When addressing directly with #1 to #F a response is sent. When sending a broadcast message with #0, no response is sent.

## Example

| Query | Action |
| --- | --- |
| #3 IY A 1000 | Channel A of XLC4 control unit with ID=3 is set to 1000 mA |
| #E LC G 1 | Second Corona II module of XLC4 control unit with ID=14 is switched on |
| #0 LC 0 | All channels of all XLC4 control units on this bus are switched on |