Automation Direct / Direct LOGIC HO-ECOM100 DL205 communication module, Modbus TCP, 1 port These are surplus items for training in a major technical training school. See our other equipment plus various Festo Lab-Volt trainer and testing systems and field device simulation modules. Some are listed some are not. Also other testing and training set ups in other auctions. These training systems can also be modified and wired for use with other systems you choose. The last 4 photos are of these testing and training systems in different auctions. Please contact us for any questions