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Overview
The PC817 4-Channel Optocoupler Voltage Isolation Module is a reliable board for isolating digital signals between high-voltage and low-voltage systems. Featuring four PC817 optocouplers, this module protects sensitive microcontrollers, sensors, or PLCs from electrical surges, noise, and voltage spikes.
A built-in jumper allows easy switching between common ground mode (for simplified setups) and full isolation mode, making it highly flexible for a wide range of applications.
Specification
Technical details for PC817 4 Channel Optocoupler Voltage Isolation Board
| Specification | Details |
|---|---|
| Optocoupler IC | PC817 (4 channels) |
| Input Voltage Range | 3.6V to 24V DC (with onboard current-limiting resistors) |
| Output Voltage | 3.6V to 30V |
| Output Type | Open-collector (pull-up resistors required on output side) |
| Jumper Function | Connects or isolates input and output ground:
|
| LED Indicators | Yes (1 per channel to show input status) |
| Isolation Voltage | Up to 5kV (internal PC817 rating) |
| Board Dimensions | Approx. 50mm x 30mm x 18mm |
| Mounting | Pre-drilled holes for easy mounting |
| Applications | Microcontroller interfacing, PLC systems, industrial automation, sensor protection |
Pinout
| Pin Label | Input or Output | Description |
|---|---|---|
| IN1, IN2, IN3, IN4 | Input Side | Signal input pins for each channel (connect to sensor or microcontroller GPIO) |
| GND (IN) | Input Side | Ground for input signals (isolated from output side if jumper is removed) |
| OUT1, OUT2, OUT3, OUT4 | Output Side | Open-collector output pins for each channel (connect to receiving circuit with pull-up resistor) |
| GND (OUT) | Output Side | Ground for output signals (connects to output system ground) |
| VCC | Output Side | Optional VCC pin for powering output circuit or pull-up voltage (typically 3.3V or 5V) |
| Jumper | Between Input and Output Grounds | Connects input and output grounds when inserted (for non-isolated mode). Remove for full isolation. |
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