PLBus512 head-end coding board

Overview

PLBus512 performs DMX512 light control data transmission through the light power cord, and implements light control without the need to lay an additional RS485 control line. Therefore, construction, installation, commissioning and maintenance are simple and convenient, and the overall cost is low (Note: DMX512 is currently a commonly used industrial standard for lighting control. PLBus512 directly supports this standard).
The PLBus512 head-end encoding board is a small module that transmits and receives data through the power cord, and can be placed in the DMX512 encoder. It can convert the DMX512 signal into a power line carrier signal and transmit it to the light terminal data through the landscape light power supply line, and then restore the DMX512 signal through the PLBbus light terminal decoder board in the light, so as to realize the light control.



The main technical indicators of the product

● Modulation method: OFDM
● Carrier working support frequency range: 2.4-5.7MHz
● Default communication rate: ≥250kbps can support data relay standard, DMX512 data transmission, support 4 levels, limit can support 15 levels
● Communication distance: under normal conditions, up to 100 meters, the limit communication distance is 300 meters
● Standby power consumption: ≤0.4w
● Transmission media: suitable for AC and DC transmission media



Module interface

● UART serial interface: 0~3.3V TTL level, the default 250kbps standard DMX512 interface, the default serial port is TXD1, RXD1 (PIN18, 19)
● Data interface: standard DMX512 data transmission, while supporting Uapps protocol (like CoAP protocol)
● Other interfaces: support 4 PWM interfaces, SPI bus, I2C bus, GPIO interface



Working conditions

● Working temperature: Normal working temperature: -40℃~ +70℃, the limit temperature can reach +105℃
● Relative humidity: ≤98%
● Line voltage: can support DC or AC, adapt to high and low voltage
● Module input power: 12V DC±1V with load ≥200mA, ripple voltage ≤120mV
● Module input power: 3.3V DC±1V with load ≥200mA, ripple voltage ≤50mV
● Clock accuracy: Active crystal oscillator is used to ensure the frequency accuracy of the modulated carrier



Module structure

● Size: 38.0mm(L)*18.0mm(W)*6.0mm(H)
● Module hardware interface: 1*22pin, pitch:1.27mm single row of pins
● Pin header size: 0.5mm

Application block diagram

The encoder board receives PLC signals from the line through a coupling transformer or couples the sent PLC signals to the line.
Withstand voltage: According to different line voltage, select the appropriate safety capacitor withstand voltage value.



Application field
Road and bridge landscape lighting
Landscape lighting such as underground lights, underwater pools and outdoor underwater fountains
Landscape lighting such as advertising screens, outdoor entertainment facilities, building exterior walls, stage lighting, etc.

Industry Classification: Lighting Display

Development Platform: Leaguer Lihe Microelectronics

Delivery form: PCBA

Performance parameters: Carrier working support frequency range: 2.4-5.7MHz, default communication rate: ≥250kbps can support data relay standards, communication distance: under normal conditions, up to 100 meters, limit communication distance 300 meters

Application scenario: landscape lighting