Allen-Bradley 1788-CN2DN ControlNet-to-DeviceNet (CN2DN) linking device. The 1788-CN2DN connects a ControlNet network to a DeviceNet network. The DeviceNet network typically consists of multiple devices, such as RediStation’s, photoeyes, etc. The ControlNet network consists of controllers, such as Logix or PLC-5 processors, HMIs, drives, I/O devices, etc