4 Channel Optocoupler Isolated Board Key benefits Isolation and voltage conversion in one compact board: interfaces 3.3V or 5V logic signals and converts them to 3.6 24V output levels while preserving signal integrity. Strong anti interference performance: photoelectric isolation provides robust noise rejection, enabling stable operation when driving higher voltage devices. Flexible /low level output control: supports both and low level outputs, adjustable easily through a jumper cap, increasing compatibility across applications. What it does 4 channel optocoupler isolation: suitable for separating control logic from voltage or noisy circuits. Output range: converts input logic signals to 3.6 24V voltage levels for driving downstream devices. voltage capability: designed to drive devices that require higher voltage levels, such as power related loads, including power triodes and MOS tubes. Compatibility and configuration Relays and outputs: effortlessly drives low power 24V relays. Adjustable outputs: jumper cap changes between level and lowlevel output modes to fit different circuits. Pulse signaling note: for pulse signal applications, the 817 module operates below 4 kHz. Applications and use scenarios Microcontroller to relay control: isolate a 3.3V/5V control MCU and safely drive a 24V relay in automation or control systems. voltage interface projects: connect lowvoltage control signals to higher voltage devices such as power stages or MOSFET/tube driven circuits while maintaining signal integrity. Signal processing and test setups: use in test benches or prototype rigs where stable voltage output is needed at slower pulse rates (below 4 kHz) for reliable measurements. General purpose isolation hub: acts as a versatile adapter for projects requiring isolation, voltage level shifting, and adjustable output polarity. Notes Model reference: 817 module operates below 4 kHz for pulse signals. Built to provide signal isolation with the convenience of voltage conversion and output level flexibility, suitable for a variety of multichannel control tasks.