220V AC Optocoupler Isolated PLC Signal Detection Module
220V AC Optocoupler Isolated PLC Signal Detection Module
220V AC Single-Channel Optocoupler Isolated PLC Detection Module
The Gaqqee 220V Single-Channel Optocoupler Isolated PLC Module is a compact, high-performance signal processing module designed to detect the presence of 220V AC power and output clean TTL logic levels for seamless integration with microcontrollers or PLC systems. Whether you're building an industrial automation setup or a DIY electronics project, this module delivers stable, reliable performance in a space-saving DIN rail-mountable form factor.
Made in Mainland China.
Key Features
- 220V AC Detection: Accurately detects the presence or absence of 220V AC voltage with optical isolation for safety and signal integrity.
- Optocoupler Isolation: Fully isolates the high-voltage side from the low-voltage signal side, protecting your microcontroller or PLC from dangerous voltage spikes.
- TTL Logic Output: Outputs standard TTL logic levels (HIGH/LOW) directly compatible with Arduino, Raspberry Pi, STM32, and other microcontrollers.
- PLC 24V Compatible: Can interface directly with PLC input terminals at 24V logic levels — no extra components needed.
- Low Power Consumption: 3–5V logic supply keeps power draw to a minimum, ideal for battery-powered or energy-sensitive applications.
- DIN Rail Mounting: Snap-on rail mounting bracket included for quick, tool-free installation in control panels and enclosures.
- Compact & Robust Design: Premium materials ensure durability and long service life in industrial and hobby environments alike.
Specifications
| Input Voltage (Detected) | 220V AC |
| Logic Supply Voltage | 3V – 5V DC (microcontroller) / 24V DC (PLC) |
| Output Type | TTL Logic Level (OUT) |
| Channels | 1 (Single-Channel) |
| Isolation | Optocoupler (electrical isolation) |
| Mounting | DIN Rail |
| Condition | New |
| Quantity | 1 Module |
| Origin | Mainland China |
Wiring Guide
Microcontroller Connection (3–5V Logic)
- Connect the module's VCC to 3.3V or 5V on your microcontroller.
- Connect the module's GND to the power supply negative terminal.
- Connect the OUT pin to a digital input pin on your microcontroller.
- Connect the blue 2P 5.0 terminal to the 220V AC source you wish to monitor.
PLC Connection (24V Logic)
- Connect PLC's COM terminal to the 24V power supply positive.
- Connect the PLC input terminal to the module's OUT signal output.
- Connect the module's GND to the power supply negative terminal.
- Connect the blue 2P 5.0 terminal to the 220V AC source.
⚠️ Safety Warning
HIGH VOLTAGE HAZARD: After powering on this module, do NOT touch any components within the white-lined area on the PCB — high voltage (220V AC) is present in this zone. Always exercise proper electrical safety precautions. Work on wiring only when the 220V AC supply is fully disconnected.
Package Contents
- 1 × 220V AC Single-Channel Optocoupler Isolated PLC Detection Module
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Frequently Asked Questions
Q: What does the 220V optocoupler isolated PLC module actually do?
A: This module detects whether a 220V AC voltage is present on its input terminals and outputs a corresponding TTL logic signal (HIGH or LOW) on its OUT pin. The built-in optocoupler provides full electrical isolation between the high-voltage AC side and the low-voltage logic side, protecting your microcontroller or PLC input circuitry from potentially damaging voltages.
Q: Can I use this module with a 3.3V microcontroller like an Arduino or ESP32?
A: Yes. The logic supply side of this module supports 3V to 5V DC, making it fully compatible with 3.3V boards (ESP32, ESP8266, STM32) as well as 5V boards (Arduino Uno, Mega, etc.). Simply supply the appropriate VCC voltage to the module's power terminal and connect OUT to a digital input pin.
Q: How do I mount this module in a control panel?
A: The module supports standard DIN rail mounting, allowing you to snap it securely into any standard 35mm DIN rail inside an electrical enclosure or control panel cabinet — no additional tools or brackets required.
Q: Is the module safe to use around 220V AC?
A: The optocoupler isolation design means the high-voltage AC circuitry is electrically separated from the low-voltage logic output. However, always follow proper electrical safety practices: never touch the components inside the white-lined zone on the PCB while the 220V AC supply is connected, and ensure all high-voltage wiring is performed by a qualified person with the AC supply disconnected.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.