---
title: "DMX512 port"
canonical: "https://docs.cuesystem.com/space/PRODUCTS/292356229/DMX512%20port"
format: markdown
---
DMX512 (Digital Multiplex) employs EIA-485 differential signaling at its physical layer, in conjunction with a variable-size, packet-based communication protocol. It is unidirectional. It is used to control stage lighting and effects as well as interior and architectural lighting.

The unit equipped with DX512 input and output ports can work in three basic modes.

1. The unit is the master control unit of the DMX512 bus. Only the DMX output of the unit is functional in this mode.
2. This mode is useful if there is some master controller of the DMX512 bus, for example, a stage console. In this mode, it is possible to use the unit to read the levels of particular channels pushed from the DMX512 control console to the DMX input, change it and send the new values to the lights.
3. This mode can be used in the same hardware configuration as in Mode 2, but in this case, the unit only re-sends commands from the master DMX console unchanged to the DMX output.

**Connector pinout:**

|  |  |  |
| --- | --- | --- |
| 3-pin 3.5 mm | Pin | Description |
| ![image](media://5e232738-b7d9-4000-9c86-c5271b37693b) | D+ | Data + |
| D- | Data - |
| C | Signal Common |

## DMX512 Port Usage

![image](media://7b9987c6-4f0c-44e9-b9bd-5805a9a86b7d)

Each DMX512 port can be used as an input or as an output port.