This digital controller OPT-DPA2024E-X from OPT Machine-Vision is suitable for operating the OPT ring lights, and is available for 4, 8 or 16 channels. programmable trigger modes, autosense of rated current, 256 light intensity settings, RS232 and 100M Ethernet communication are just some of the features. The maximum output voltage is 24V, the maximum output current is 2A.