PC817 2 Channel Optocoupler Isolation Module

PC817 2 CH Optocoupler Isolation Module is a dual-channel signal isolation board using PC817 optocouplers. It provides reliable electrical isolation between high-voltage or noisy circuits and low-voltage microcontroller logic. Ideal for level shifting, signal protection, and eliminating ground loops in automation and embedded applications.

Key Features:

• Dual Channel Isolation: Each channel uses a PC817 optocoupler for signal separation.
• Wide Input Range: Operates on 3.3V or 5V input signals.
• Fast Switching: Provides quick and accurate signal transfer with low latency.
• LED Indicators: Built-in LEDs for visual status of signal activity.
• Optical Isolation: Eliminates noise, surges, and interference from control logic.

Technical Specifications:

• Optocoupler Model: PC817
• Input Voltage: 3.3V or 5V logic level
• Output Type: Open collector output
• CTR: 50% to 600% typical
• Response Time: 4µs (rise), 3µs (fall)
• Input Resistors: Pre-soldered onboard for signal conditioning
• Channel Count: 2 isolated input-output paths

Mechanical Specifications:

• PCB Material: FR4 with copper traces
• Board Dimensions: Approx. 34mm × 20mm
• Pin Header: Male headers for plug-and-play connection
• Mounting Holes: 2 × M2 holes for panel or enclosure mount

Pinout and Wiring:

• Inputs: IN1, IN2 (for logic signals)
• Outputs: OUT1, OUT2 (open collector or pull-up required)
• Power Supply: VCC and GND for module operation
• Connection: Match input/output pins with microcontroller I/O or control signals

Datasheet and Documentation:

• Download PC817 Optocoupler Datasheet (PDF)

Applications:

• Microcontroller Isolation: Prevents electrical noise from damaging GPIOs.
• Industrial Signal Monitoring: Isolates sensors or switches in noisy environments.
• Switch Debouncing: Acts as a buffer between mechanical switches and logic circuits.
• Communication Isolation: Separates RS232/RS485 signals from logic side.
• Home Automation: Used for controlling relays, fans, and lights safely.

Equivalent Models:

• EL817: Functionally equivalent 4-pin optocoupler
• 4N35: Alternate phototransistor optocoupler with similar specs
• TLP521: Toshiba-compatible version used in isolation circuits

Package Includes:

• 1 x PC817 2 Channel Optocoupler Isolation Module