RS485 Connector Expansion Shield for LattePanda V1

1. Usage Example for LattePanda-Upper-computer Software Control

This guide details the usage of LattePanda with RS485 Connector Shield and IoT Ethernet Relay Controller, providing step-by-step wiring instructions and software setup for controlling devices.

2. Usage Example for LattePanda-Serial Debugger Control

This article offers a comprehensive guide on utilizing the LattePanda Serial Debugger for controlling relay modules, featuring hardware preparation, wiring diagrams, and command instructions for effective operation.

3. Example Code for LattePanda-Python ModBus Library Control

This article presents example code for controlling relay modules using Python ModBus libraries on LattePanda V1, including hardware setup, wiring diagrams, operation steps, and results to achieve effective device control.

Reference

The article provides a detailed examination of RS485 and Modbus communication protocols, focusing on their electrical characteristics, transmission methods, and advantages in industrial applications, including noise immunity, long transmission distances, and multi-station capabilities.

Parameter	Specification
Operating Voltage	+5V
Compliance Standard	EIA/TIA-232-F Standard Compliant
Max Baud Rate	115200 bps (LattePanda V1.0 TTL signal can only be adjusted to 115200 bps)
Max Power Output	12V (Output current is smaller than 150mA)
Isolated Voltage	2500 VDC
Bus Load Capacity	1/8 Unit Load, Bus load up to 256 nodes
Protection Function	Bus fault protection and Bus driver short-circuit protection
Operating Temperature	-40℃ to +105℃

RS485 Connector Expansion Shield for LattePanda V1

Specification

Pinout