Skip to main content

All You Wanted to Know About DB9 Connectors


If you deal in cable and connectors, you must have come across the term DB9 Connector. This connector is named like that because of its trapezoidal shape that looks like letter "D". It has been designed in such a way that it can work with EIA/TIA 232 serial interface standard and used for Serial Asynchronous Data Transmission. You will find DB9 Connectors used with computer, audio/video, and data applications. DB9 ports were quite popular during the initial years; but with the introduction of usb, firewire etc its popularity declined.



The RS 232 is the recommended standard for enabling serial data transfer between DCE (Data Circuit-terminating Equipment) and DTE (Data Terminal Equipment). When you buy these connectors, you can recognize them by the letters A to E that denote the shell size and also by the number of pins. M or F indicates whether it is a male or a female connector. Let us know more about these connectors, their types, electrical specifications and applications:

DB9 Connector –Sizes and Types

DB stands for D sub or D subminiature. However, its real name is DE-9. There are times when DE-9 D-sub 9-pin connector is wrongly referred to as "DB-9 connector".  Here, "E" refers to the shell size. Every shell size of DB9 connector corresponds to a particular number of sockets or pins. For example, A with 15, B with 25, E with 9 and so on…  DB9 indicates 9 position shell and 9 indicates contact terminals. They were used a lot in PC. Db-xx on the other hand is used for all types of serial connectors.

Electrical specifications of DB9 Connectors

  1. Rating: 3 Amps max
  2. Contact resistance: 20 mOhms max
  3. Operation voltage: 250VAC max
  4. Insulation resistance: 3000 MOhms min at 1000 VDC between
  5. Dielectric withstanding voltage: 1000 VAC min rms (sea level)

Application of DB9 connectors    

DB9 connectors are used for the following purposes:
  • To connect peripheral devices in the outdated pcs
  • With keyboard, mouse and joysticks
  • In microprocessors evaluation board, circuit boards etc while programming
  • Stepper and servo motor interface
  • Modem and network

There are several firms through which you can buy DB9 serial cables and connectors online including SF Cable. You can get in touch with their experts and seek their advice before deciding on the type of cable you want. Once you get insights about the kind of cable you need, you can order it online. Make sure you are clear with the specifications and usage before you order for these cables and connectors.

Labels:

Comments

Post a Comment

Popular posts from this blog

What is the Difference between C13 and C15 Power Cords?

There is an array of power cords available in the market. It can get quite perplexing to choose the one that will fit your needs. In order to know more about them, you must have more information about these cords. This article will acquaint you with   IEC C13   and   IEC C15   power cords   and how they are different from each other. But before that, let us understand what IEC is. IEC stands for International Electrotechnical Commission. Every cord is standardized by IEC before it is introduced in the market. These cords use the letter “C” which is followed by the number in their cords. Let’s get back to understanding the difference between IEC-C13 and C15 connectors. Some of them are mentioned below. Difference of a Notch One of the most apparent differences between the two connectors is the notch on C15 connector. Although C15 looks quite similar to C13, it has a little groove opposite the earth. The IEC-C15 connectors also work in the C14 outlets. But the IEC-C13 connector
Post a Comment
Read more

How to Improve Your Internet Speed

When your internet speed is slow, you start blaming the game. But it is important to find out the root cause behind that. Today, we are here with a list of solutions which you can apply to achieve an ideal internet set up rendering high-speed data. Here’s how you can increase the internet speed: Choose The Mobile Operator Wisely There is a smart way of doing that. Find out the mobile service provider which would give you the fastest service at your preferred locations. Gather a group of friends with various mobile devices and perform a speed test together. You can even organize a speed test meet up where you can visit your friend’s house turn by turn. Note that, it is important to restart the Wi-Fi connection before you run the test. You can achieve faster speeds by even switching the service providers with each other. Fix The Wi-Fi Dead Spots You can run the speed tests in the areas where you use Wi-Fi to find out if it’s a dead spot. If you encounter a problem at that p
Post a Comment
Read more

How to Distinguish Between C5 and C7 Power Cords?

There is no doubt that the functionality of electronic equipment is significantly influenced by the power cords. When you choose to work with electrical appliances, you may have come across several kinds of cords including c5 power cords and c7 power cords .  However, what is crucial is understanding that these two power cords are not the same entirely. They come with significant differences. Wondering what those are? Well, before you pick between these for your electronic gadget, let's discover the difference they both share. What is Meant by c5 Power Cords? The first types of cord are the C5 power cords which are basically three-pronged and are also known as the "Mickey Mouse" connectors. This is because they have a very unusual design and are used for laptops and other compact electronic devices.  These types of power cords connect easily to the power source and come with a Clover shape connector that fastens to the power adapter. One of the main advantages of the c5
Post a Comment
Read more