Tips: you need 4 Port 3 pin Ethernet to DMX bi-directional converter

see here:
https://www.ebay.com/itm/195603078912

ArtNet-DMX is an Ethernet to DMX bi-directional converters. It provides bi-directional conversions from ArtNet to DMX512. The equipment with high-speed ARM processors, follow the ArtNet protocol standard provides an RJ45 network interfaces and standard DMX512 output interface. ArtNet-DMX highly compliant protocol standards, real-time, stable and reliable. It has been designed through a Ethernet DMX transmission, it has two Operation Mode: INPUT MODE (SERVER MODE), and OUTPUT MODE (NODE MODE). In OUTPUT MODE, the device via the Ethernet receives Art-Net signals and convert to dmx512 signals. In INPUT MODE, the DMX512 signal is converted to Art-Net signal and be transmitted over the Ethernet.

ArtNet-DMX4/8 factory-configure an IP address of 2.xxx and a subnet mask of 255.0.0.0, there is generally no need to amend, you can plug-and-play. Users or special network configuration can be modified using a PC configuration tools and WEB browser.

Packing
1 x 2 way artnet DMX512 signal icontroller
1 x internet cable
1 x USB(Inside have software and manual book)
1 x power plug
1 x box