USB connector standard (version 1.0 and 2.0) started with a USB type A connector with 4 contact pins (USB A pinout). Then came the newer version USB 3.0 standard. The number of pins increases to support higher data transfer speed. The USB type A plug/receptacle is then redesigned with more pins, with physical compatibility when it is plugged with the older version of the USB type A connector.
USB Type A pinout diagram (USB A pinout)
USB Type A (USB version 2.0, version 1.0)
Pinout of the simple version of the USB plug/receptacle.
Pin No.
Name
Description
1
5V
5V power supply
2
D-
Data -ve
3
D+
Data +ve
4
Gnd
Ground
USB type A (USB version 1.0, version 2.0) pin out description
USB Type A (USB version 3.0)
Pinout of the new USB 3.0 standard, design the type A connector (plug/receptable) to be backward compatible to the former USB 2.0 type A connector.
Instant Pass or Fail result with an audible and visual indicator
(Step 1) Setup RS232 Connectors.
Find a mating connector for your RS232 Cable.
The mating connectors can come from an RS232 cable. Cut it in half and strip the wire of the mating connectors. Screw down the striped bare end of the wires to the screw terminal (green plug).
d-sub 09 female connector setup for RS232 cable testing.
Screw each of the wire onto the screw terminal (green plug).
You can screw the wire in in any order onto the screw terminal.
d-sub 09 male connector setup for RS232 cable testing.
(Step 2) Learn master cable’s connection.
Plug in your mating connector to the CCT-01 Cable Continuity Tester.
Plug in your original master RS232 cable onto the mating connector.
Press LEARN button to learn the wiring connection of your master cable.
Learning master RS232 cable
(Step 3) Test RS232 cables
Unplug the master cable aside. You no longer need this master RS232 cable. The connection from this master RS232 cable is learned and memorized by this cable tester.
Plug in the RS232 cable that you want to test. Press the “Start Test”.
A green LED indicates with beep tones indicates that the RS232 cable has passed the test. The connection of this RS232 cable is the same as the master cable that was learned earlier.
A red LED indicates that the RS232 cable tested is different from your master cable.
Testing the rest of the RS232 cables
More than just a RS232 Cable Tester
CCT-01 Cable Continuity Tester is a universal cable tester that can test all kinds of cable, no matter how complex your cable connection is. There are also many advance features loaded to help you test and document your cable connection instantly.
An ultimate handy testing tool on your workshop bench top.
An RJ45 to RS232 console cable is used to connect a computer to a serial console port on a network device, such as a router, switch, or firewall. One end is connected to the server with RJ45 connector (8P8C, 8 pins), and the other end is to a computer with a D-Sub connector (female 9 pins, often known as d-sub09 connector)
A serial console cable is usually used for conveniently sending serial configuration commands to a server or equipment (usually Cisco equipment, often known as the Cisco Console Cable).
Serial Console Cable Pin Out Diagram (RJ45 to RS232 female cable)
Serial Communication Setup
Typical communication baud rate setup for a serial console cable for Terminal Console.
In most applications, only pin 02 03 05 on the D-Sub 9 Pins connector is used for the RS232 application. This 3-wire communication mode is non-hardware-handshaking or asynchronous data communication. Meaning that the serial data is sent out based on a pre-set timing clock.
The rest of the pins are meant for controlling the flow of the data. Hardware handshaking (synchronous data communication) is slower. These are hardly used these days because of the faster processing power of IC chips and the timing precision that we have now. For most applications, you don’t need to wire up these wires. But we will still be presenting the purpose of these pins on the D-sub connector for complete documentation of the pin out.
Pin 01 DCD – Data Carrier Detect (IN), indicator signal is detected from the remote terminal (the other end of the terminal).
Pin 02 TXD – Transmitted Data (OUT), data sending out to the remote terminal.
Pin 03 RXD – Received Data (IN), data coming in from the remote terminal.
Pin 04 DTR – Data Terminal Ready (OUT), local terminal side is ready to receive data.
Pin 05 GND – Signal Ground (COMMON), reference pin for all the signal pins.
Pin 06 DSR – Data Set Ready (IN), remote terminal is ready to receive and send data.
Pin 07 CTS – Clear To Send (IN), remote terminal is ready to receive data.
Pin 08 RTS – Request To Send (OUT), the local terminal is requesting the remote terminal to send over data.
Pin 09 RI – Ring Indicator (IN), the local terminal receives the ring from remote terminal.
Check out here for our universal Cable Tester project.
