News Center

DB9 Curly Cable manufacturers take you to understand whether the serial cable is crossed or directly connected

Many people do not know whether the serial cable should be crossed or directly connected. The following DB9 Curly Cable manufacturer will take you to find out.

good price and quality DB9 Curly Cable on sales
1. Serial line interface and connection method
The DB9 Curly Cable manufacturer tells you that there are three types of male and female headers: male to female, male to male, and female to female. The above three connection lines have crossover lines and straight lines, so there are a total of 6 connection methods.
2. What is straight line and cross line?
Direct serial cable: 2 to 2, 3 to 3, 5 to 5. Cross serial cable: 2 to 3, 3 to 2, 5 to 5.
3. Why do cross and direct serial lines appear?
The DB9 Curly Cable manufacturer tells you that the standard definition of DB9 is that pin 2 is RXD and pin 3 is TXD. When designing the circuit, some people connect pin 2 to TXD and pin 3 to RXD in order to use a direct cable.
The DB9 Curly Cable manufacturer tells you that if you do not reverse the definition of the transceiver and the standard pins in the circuit design, you must use a crossover cable. Under normal circumstances: two female headers are crossed wires, one male and one female are straight connections. Communication conditions: RXD is connected to TXD, TXD is connected to RXD, and whether it is a cross-wire or a straight-line connection is selected according to the circuit design. Making serial cable: DB9 Curly Cable manufacturer tells you that when you only have straight cables, you can cut them off. 2 pairs of 3, 3 pairs of 2, and 5 pairs of 5 are soldered to form a crossover cable.

Related News

What is a terminal block used for?

While there are many factors to consider when designing an overall system, terminal blocks are an optimal solution for complex electrical system connections. With a variety of color options and configurations, Premier Cable’ terminal blocks offer a range of options to meet your design challenges.

CANBus Applications

CAN-bus has been widely used in various automation control systems. For example, CAN-bus has incomparable advantages in various fields such as automotive electronics, automatic control, smart buildings, power systems, and security monitoring.

Introduction to M12 connector pin coding

M12 encoding types are A encoding, B encoding, D encoding and X encoding. A-code, B-code and X-code are some of the earliest developed and longest-available M12 connectors. The latest M12 coding types currently under development are K coding for AC and L coding for PROFINET DC.

Cables – What are the correct cable sizes for an NMEA 2000 network?

The three different sizes of NMEA 2000 certified DeviceNet standard cabling are "micro," "mid," and "mini."

What are the advantages of NMEA 2000?

The Premier Cable Starter Kits provide everything you need to get to create a basic NMEA 2000 network from scratch.

The role of DeviceNet terminal resistor

DeviceNet_network is a fieldbus network protocol based on Controller Area Network (CAN). In the DeviceNet network, the terminal resistor plays the role of compensation and protection for signal transmission. The function of the terminal resistor is to eliminate signal reflection and interference and ensure the signal transmission quality.