Finder's industrial expertise is combined with the open-source innovation of Arduino Pro. Opta is the first programmable logic relay, as reliable as a Finder industrial relay. Innovative and connected with Ethernet, Wi-Fi, and Bluetooth Low Energy technology. Programmable without licenses using Arduino IDE or programming languages such as LADDER, FBD, or IEC/EN 61131. Thanks to an integrated secure element chip, it guarantees the highest IoT security. OPTA is a programmable logic relay (PLR) with 8 digital/analog inputs (0…10 V). It can be programmed in both traditional programming languages (LADDER) and the innovative open-source programming language (IDE/ARDUINO). USB (Type C) interface for power supply during programming and data collection via a USB stick. The product range includes: Type 8A.04-8300 – Lite with USB (Type C High-speed interface), ETH; Type 8A.04-8310 – Plus with USB (Type C High-speed interface), ETH, and Modbus RS485; Type 8A.04-8320 – Advanced with USB (Type C High-speed interface), ETH, Modbus RS485, Wi-Fi, and BLE.