NOYITO TLP281 4-Channel Optocoupler Isolation Board for High and Low Level Optocoupler Isolation Expansion Board (Pack of 5)

Product Overview This 4-channel optocoupler isolation board is designed to safely connect low-voltage digital systems (such as 3.3V/5V microcontrollers or Arduino) to high-voltage or noisy equipment. Built with TLP281 optoisolator ICs and discrete transistors, it creates a reliable electrical noise barrier, isolating your controller from high-power systems to prevent electromagnetic interference (EMI) caused by devices like servos or motors turning on and off. Unlike standard optoisolators that invert signal logic, our integrated transistor design corrects this inversion—what you input to the IN pins is precisely replicated on the OUT pins, but at your desired high voltage (HV) level. With 4 independent channels, it’s ideal for noisy circuits where signal lines require electrical isolation. Key Features Low-Voltage Control for High-Voltage Devices: Effortlessly control 9V/12V (up to 24V max) equipment using 3.3V or 5V signals from microcontrollers, Arduino, or other TTL logic devices Reliable Signal Isolation: Built-in TLP281 optoisolators (4 LEDs + 4 photodiodes) and discrete transistors eliminate logic inversion, ensuring accurate signal transmission Strong Anti-Interference Performance: Creates an electrical noise barrier to protect your control system from EMI generated by motors, servos, or other high-power devices 4 Independent Channels: IN1/IN2/IN3/IN4 pins directly control OUT1/OUT2/OUT3/OUT4 respectively, supporting multi-device control simultaneously Stable Electrical Parameters: Maximum HVCC (high-voltage supply) ≤ 24V; maximum output current = HVCC / 5.1KΩ; maximum sink current up to 500mA Easy Wiring: Input GND connects to microcontroller/Arduino GND; HVCC connects to the positive terminal of the high-voltage power supply, HGND connects to the negative terminal Compact & Lightweight: Small size (25×24×11mm L×W×H) and light weight (3.0g/pcs) for easy integration into various projects *Package Included: *5 pcs NOYITO TLP281 4-Channel Optocoupler Isolation Board

• TLP281 4 Channel Optical Coupler Isolation Module
• A normal LED opto-isolator will invert the logic of a signal
• A higher voltage than the TTL logic on the (3.3V or 5V) micro
• Connecting digital systems (like a 5V microcontroller) to a high-voltage or noisy system
• Small size (25×24×11mm L×W×H)
• Manufacturer's One-year After-sale Warranty.