Description �� PC817 4-Channel Optocoupler Isolation Module – 3.3V / 5V to 24V Signal Converter | AuscomTech The PC817 4-Channel Optocoupler Isolation Module is a compact and reliable solution for safely isolating low-voltage control signals from higher-voltage circuits. Using four independent PC817 optocouplers, this module provides strong photoelectric isolation to protect sensitive microcontrollers from noise, voltage spikes, and ground loops, while enabling control of higher-voltage devices such as relays, transistors, and MOSFETs. It is well suited to Arduino, ESP32, Raspberry Pi, PLCs, and industrial control applications where clean, isolated signal switching is required. ⭐ Key Features �� 4 Independent Optocoupler ChannelsEach channel uses a dedicated PC817 optocoupler, allowing multiple isolated signals to be controlled simultaneously. ⚡ Wide Voltage CompatibilitySupports 3.3V or 5V logic input signals and switches output voltages from 3.6V up to 24V DC. �� Photoelectric Signal IsolationOptocoupler-based isolation protects control electronics from electrical noise, transients, and ground potential differences. �� Configurable Output LogicOnboard jumper allows selection between high-potential or low-potential output to suit different circuit requirements. �� MCU & Driver FriendlyCapable of driving power transistors, MOSFETs, and low-power 24V relays. �� Pulse Signal SupportDesigned for switching and pulse signals up to approximately 4kHz. �� Technical Specifications Optocoupler: PC817Channels: 4Input Logic Voltage: 3.3V / 5VOutput Voltage Range: 3.6V – 24V DCMax Output Current: 10mA per channelSignal Frequency: ≤ 4kHzIsolation Type: Photoelectric (optocoupler)Board Length: 48 mmBoard Width: 38 mmMounting Hole Spacing (Long): 42 mmMounting Hole Spacing (Wide): 32 mm ⚠️ Important Notes • Output current is limited to 10mA per channel• Not suitable for high-speed signals above ~4kHz• Voltage and current are inversely related — observe load limits• For faster switching, use a high-speed optocoupler �� Compatible With • Arduino (Uno, Mega, Nano)• ESP32 / ESP8266• Raspberry Pi GPIO• STM32 microcontrollers• PLC digital I/O modules• Relay, MOSFET, and transistor driver stages ⚙️ Typical Applications • PLC signal isolation• Microcontroller I/O protection• 3.3V / 5V to 12V / 24V level shifting• Industrial automation systems• Relay, MOSFET, and transistor control• Noise-sensitive or mixed-voltage circuits• Ground loop and interference protection �� Package Includes • 1 × PC817 4-Channel Optocoupler Isolation Module
