Specifications: Optocouplers: Type: PC817 Channels: 8 Isolation Voltage: 5000 Vrms Input LED Forward Voltage: 1.2V (typical), 1.4V (max) Input LED Forward Current: 20 mA (typical) Input Specifications: Input Voltage: 3.3V to 24V DC (varies based on design, often adjustable) Input Current: Depends on the input voltage and the series resistor used with the optocoupler’s LED Output Specifications: Output Type: Transistor (open collector) Collector-Emitter Voltage: 80V (max) Collector Current: 50 mA (max) Board Specifications: Dimensions: Varies by manufacturer, typically around 60mm x 100mm PCB Material: FR4 Mounting Holes: Typically 4, one in each corner Terminal Blocks: Screw type, 5mm pitch Power Supply: Varies, typically 5V DC or separate power for input and output sides Performance: Response Time: 4 µs (typical) Temperature Range: -30°C to 100°C (storage), -30°C to 85°C (operating)