PLC control scheme
System Features
·No need for line renovation, simple and convenient implementation;
·Mature technology;
·Anti interference technology has been proven for a long time.

Features
·Carrier communication: point-to-point transmission distance of 2500 meters, 2 kilometers after automatic relay at the terminal;
·The number of terminals that can be controlled by the centralized controller is ≥ 2000;
·The terminal controller can control lighting equipment such as sodium lamps, LED lamps, ceramic metal halide lamps, etc. with a power of 500W;
·The terminal device supports two dimming modes: PWM forward and 0-10V forward; Configurable reverse mode;
·Using existing cables for signal transmission without the need for additional control circuits;
·Implement control functions;
·Implement alarm function;
·Low investment, no need to consider line investment;
·Suitable for any line with wires and cables.

NB IoT Control Solution
Application
·Urban road lighting control
·Intelligent lighting control for tunnels
Characteristic
·Easy installation, low power consumption, low cost
·Wide coverage, large capacity, high stability
Features
·Adopting NB IoT wireless communication method;
·The terminal controller can control lighting equipment such as single lamp heads, LED driver power supplies, sodium lamps, etc; The terminal device supports PWM and 0-10V forward dimming modes;
·Standard NEMA interface, easy and fast installation;
·Wide coverage, 20dB gain;
·Low power consumption, zero battery life;
·Large connection, 50000 connections per community;
·Low cost, module cost of $5;
·Implement alarm function;
·Implement control functions;
·Equipped with lightning protection function;
·Suitable for tunnel lighting, urban road lighting, and landscape lighting.
 

Smart City
The current situation and pain points of urban road lighting: With the acceleration of urbanization in China, the role of urban lighting construction as a reflection of urban image is increasingly valued. In the urban lighting system, how to save energy, improve the utilization rate of street lamp energy, and achieve intelligent upgrading of street lamp lighting has become an urgent problem to be solved. The traditional way of controlling street lights has multiple pain points: manually switching on and off the lights according to a schedule, using time as the sole basis for turning on and off the lights, power line carrier control is susceptible to interference from strong magnetic fields on power lines, and GSM short message control must be done through mobile phones, which is costly. The problems with the five traditional street light control methods mentioned above are: the operation results cannot be centrally monitored, recorded, and statistically analyzed, which cannot meet the requirements of quantitative management, and inspection and maintenance are extremely inconvenient, which is not suitable for the development of urban modernization. With the continuous promotion of modern urban construction and the implementation of the concept of smart cities, the requirements for street lighting are also increasing. How to remotely control the lighting, brightness adjustment, inspection, and maintenance of street lamps on a large scale has become an important direction in urban planning for street lamps.
Solution: IoT management for intelligent lighting
DM Smart Lighting: An intelligent lighting system based on LoRa and NB IoT narrowband IoT communication technology.
Composition of Smart Lighting System: The DESIGNMAN smart lighting system mainly consists of lighting street lamps, IoT node controllers, centralized controllers, DM cloud service platforms, web clients/APPs, providing a series of products based on LoRa and NB IoT IoT smart lighting.
Node Controller: The Dm IoT node controller is the terminal control device for smart lighting systems; Suitable for different solutions: NEMA external/internal wireless/internal RJ45
 

Smart lighting system functions
·View records: Display the geographical location distribution of smart streetlight poles in GIS geographic information system; Remote acquisition of the current online and offline status of street lamps; Tagging system and equipment status information, operation and maintenance information, and data statistics information, supporting the customization of the number and type of displayed information tags.
·Precise control: supports flexible grouping of street lamps, single lamp control, centralized control, and automatic control; For single lamps, group street lamps are operated in real-time to turn on, off, and adjust brightness; Support setting lighting control plans to automatically turn on and off lights, and adjust brightness; Support installation of address latitude and longitude coordinate gateway to automatically calculate sunrise and sunset time, automatically switch on and off, and adjust brightness; Support setting special dates and locations to automatically implement lighting control plans; Customizable radar sensing activation and dimming.
·Easy maintenance: Real time monitoring of the current, voltage, power, power factor, and brightness of street lamps, automatic alarm for abnormalities, self repair of equipment, or generation of manual maintenance orders.