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Overview of Power Line Carrier Technology

Power Line Carrier Communication Technology (PLC). PLC, or Power Line Carrier technology, refers to the method of transmitting digital signals at high speeds over existing power lines using carrier wave modulation. Its most notable feature is that it eliminates the need to build additional network infrastructure—data transmission can be achieved wherever power lines exist.

Power Line Carrier Communication (PLC) Control System Architecture

Centralized Smart Lighting Control System Architecture for Building Retrofit

Traditional office buildings usually rely on manual control for switching lights, which results in high management costs, low efficiency, and frequent occurrences of lights being left on in areas where they should be off, causing unnecessary energy wastage and lacking unified centralized control management. Easyctrl Intelligence adopts a self-developed power line carrier control system solution to upgrade to intelligent lighting centralized control without changing the original wiring. Moreover, its cost is not as expensive as a bus lighting control system, and its stability is much better than that of low-cost wireless control systems. Easyctrl Intelligence's PLC power line carrier control system is a complete solution for upgrading and retrofitting the lighting in traditional office buildings.

Single area PLC system diagram

Developed by Guangzhou Easyctrl Intelligent‌, PLC Single-Space Intelligent Lighting Control System is an innovative smart lighting solution based on power line carrier communication technology. This system utilizes PLC technology to enable functions such as light switching, dimming, color adjustment, and scene customization. Control methods include ‌local panels, 4-inch central touchscreens, mobile apps, and voice control‌. Compared to wired bus systems (e.g., KNX, DALI, RS485, CAN), it eliminates the need for additional communication cabling, significantly reducing installation costs and labor. Unlike wireless systems (e.g., Wi-Fi, Bluetooth, ZigBee), PLC communication offers enhanced stability and reliability with a simpler, faster, and more convenient implementation.The system requires no additional 4-core communication cables, as it transmits control signals through existing power lines. By replacing standard 86-type switch panels with ‌PLC smart panels‌ or ‌4-inch touchscreens‌ and simply adding a neutral wire, users can seamlessly upgrade to a PLC-based single-space intelligent lighting control system. This solution combines cost-effectiveness, reliability, and ease of installation, making it ideal for retrofitting existing electrical infrastructures while supporting advanced smart lighting functionalities.

Multi-Zone Remote PLC (Power Line Communication) Control System Architecture Diagram

In some large-scale industrial plants requiring lighting system retrofits, it is impractical to install cabling (Ethernet or fiber optic) from each partitioned zone to the central control room. Access and control of lighting circuits in these zones currently rely on 4G or similar communication methods, with clients including mobile phones, tablets, and computers for remote control functionality. For each partition, the upgrade aims to transform the existing lighting system into a smart centralized control system ‌without altering the original wiring‌. To address this multi-zone remote control demand, ‌Guangzhou Easyctrl Intelligent provides a robust ‌multi-zone remote PLC (Power Line Communication)-based control system‌. By leveraging PLC technology (data transmission via existing power lines) and integrating ‌edge gateways with MQTT communication services‌, the solution achieves centralized, cross-zone remote control of intelligent lighting. The architecture aligns with the diagram above

System Advantages

Robust and stable Power line carrier system

1‌.Wireless Installation：Single-cable integration: Power and communication combined for 128 lights per panel.

2.‌Flexible Grouping：Software or driver-coded grouping (up to 32 groups) for customized configurations.

3.‌Precise Color Temperature Control：Fixed presets via app/scenes: 2000K (golden), 3000K (warm), 4000K (neutral), 6000K (cool).

4.‌No Programming Required：User-friendly scene customization via app or 4-inch touchscreen; no technical expertise needed.

5.‌High Scalability：Supports RS485, Wi-Fi, and network interfaces with open protocols for cross-system integration.

6.‌High Reliability：Stable operation in harsh industrial environments.

7.‌Anti-Interference Design：Robust resistance to electromagnetic interference (EMI) and external disruptions.

8.‌Cost-Effective：Superior price-to-performance ratio compared to traditional control systems.

9.‌Communication Capabilities：Seamless data exchange and integration with external devices/systems.

10.‌Broad Applicability：Adaptable to diverse industrial applications and system scales.