Understanding the Differences Between RS232 and RS485 Communication Buses

Understanding the Differences Between RS232 and RS485 Communication Buses

Overview of RS232 The RS-232 interface complies with the serial data communication interface standard established by the Electronic Industries Alliance (EIA). The original designation is EIA-RS-232 (abbreviated as 232, RS232). It is widely used for connecting computer serial interface peripherals. This includes connection cables as well as mechanical, electrical, signal, and transmission processes. The RS-232-C … Read more

Connecting Inverters’ PU Interface to Computers with RS-232C Interface

Connecting Inverters' PU Interface to Computers with RS-232C Interface

Connecting Inverters’ PU Interface to Computers with RS-232C Interface Since most computers do not come with RS-485 interfaces, and many computers are equipped with RS-232C interfaces (serial ports, also known as COM ports), an RS-232C to RS-485 interface converter can be used to connect computers with RS-232C interfaces to the PU interface.

RS-232, RS-422, RS-485, and Modbus: A Detailed Explanation of Industrial Communication Standards

RS-232, RS-422, RS-485, and Modbus: A Detailed Explanation of Industrial Communication Standards

These communication standards play different roles in industrial automation. Let me use a traffic system analogy to help you understand: Basic Positioning of the Four Standards 1. RS-232: A One-to-One Small Road Features: The earliest serial communication standard (1969) Point-to-point full-duplex communication (simultaneous two-way) Single-ended signal transmission (susceptible to interference) Typical transmission distance ≤ 15 … Read more

Comparison of RS-232 and RS-485 Interfaces

Comparison of RS-232 and RS-485 Interfaces

Serial interfaces are primarily used for serial bit-by-bit data transmission, allowing for bidirectional communication with just a pair of transmission lines, which offers the advantages of simple communication lines and low costs. Nowadays, many serial data interfaces are used in specific fields, with common examples including I2C, CAN, LIN, SPI, Flex, MOST, and I2S. Of … Read more

Evaluation of 50 Cent MCUs: How Fast Can GPIO Toggle?

Evaluation of 50 Cent MCUs: How Fast Can GPIO Toggle?

Recently, an engineer asked me how fast the highest toggle speed of an MCU can reach. I had heard about this topic years ago, but I had never actually tested it. This time, I took the opportunity to conduct some tests and discovered a lot of knowledge hidden within. For this test, I selected three … Read more

QT290G Indoor LoRaWAN Gateway

QT290G Indoor LoRaWAN Gateway

1. Product Overview The QT290G is an indoor gateway that adheres to the standard LoRaWAN™ protocol. It can connect to standard LoRaWAN terminals and facilitate bidirectional communication. The gateway connects to the company’s NS (Network Server) via a standard Ethernet interface and can be expanded to support 4G/LTE for data upload. It also supports local … Read more

CAN to CANopen – Gateway Converter HD67042-A1

CAN to CANopen – Gateway Converter HD67042-A1

CAN to CANopen –Gateway Converter–HD67042-A1 Author: Zou Wuyi Mobile185-020-77899 Email: [email protected] 1、Product Features:HD67042 is a CAN / CANopen converter. It has the following features: Triple isolation between CAN and power, CAN and CANopen, CANopen and power; Bidirectional information transmission between CANopen bus and CAN bus; Can be mounted on a 35mm DIN rail; Wide power … Read more

Siemens PROFIBUS Terminal Resistors

Siemens PROFIBUS Terminal Resistors

When transmitting voltage signals over an electrical network, if the impedance at the end of the transmission line suddenly becomes infinite, the voltage signal will cause reflections at that point. The reflected signal superimposes on the normal signal, affecting communication. To eliminate such reflections, a terminal resistor that matches the characteristic impedance of the cable … Read more

Application of PROFIBUS in Electric Control of Oil Drilling Rigs

Application of PROFIBUS in Electric Control of Oil Drilling Rigs

In the electric control system of oil drilling rigs, PROFIBUS serves as an advanced industrial communication protocol, providing a stable and reliable communication platform for the automation control of drilling rigs. PROFIBUS has been widely used in electric drive systems due to its mature technology, high reliability, and modular functionality. It can connect various sensors, … Read more

Application of PXB-6021: Transforming Modbus IO Modules into CANopen IO Modules

Application of PXB-6021: Transforming Modbus IO Modules into CANopen IO Modules

In modern industrial control, we often encounter situations where Modbus IO needs to connect to CANopen IO. How can we achieve interoperability between these two different communication protocols? PXB-6021 is a newly launched Modbus to CANopen protocol converter from Zhiyuan Electronics. It features 1 CAN channel, 1 100Mbps Ethernet port, and 1 RS485 port.This product … Read more