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Custom RS232 Cable

Our customized RS232 cables
Our customized RS232 cables

RS232 is a serial communication protocol defined as a single-ended standard used to increase the communication distance in low-rate serial communications.

Over the past 27 years, our factory has produced a variety of customized RS232 cable assemblies for many customers, including but not limited to DB9, DB15, DB25, DB37, HD50, etc. If you have any project about RS232 cable assembly,  please feel free to contact us.

Our customised RS-232 cable assemblies

Advantages of our customized RS232 cables

  1. Accept small-batch production orders at affordable prices.
  2. Equipped with multiple automated production equipment, high-end complex RS232 cable assemblies can be customized.
  3. Fast delivery, all processes (such as welding, over-moulding, and performance testing) are done in-house, and orders are usually done within 10-15 working days.
  4. 100% product qualification rate, all products are 300% tested and zero defects.
  5. We have passed relevant certifications such as UL, CE, and USB4TID, and provide various options, lengths, and materials to meet your needs.

You may want to know more about RS232 cables

RS232 generally uses a 9-pin and 25-pin serial interface, divided into male (Male) and female (Female) two, males for DTE devices, female for DCE devices, and different pins for different functions.

RS-232 (9-pin serial port pin definition)

RS-232 (DB9 serial port pin definition)
RS-232 (DB9 serial port pin definition)
NumberNameAbbreviation
1Data Carrier DetectDCD
2Received DataRxD
3Transmitted DataTxD
4Data Terminal ReadyDTR
5GroundGND
6Data Set ReadyDSR
7Request To SendRTS
8Clear To SendCTS
9Ring IndicatorRI

RS-232 (25-pin serial port pin definition)

RS-232 (DB25 serial port pin definition)
RS-232 (DB25 serial port pin definition)
NumberNameAbbreviation
1Shield/
2Transmitted DataTxD
3Received Data RxD
4Request To SendRTS
5Clear To SendCTS
6DCE Ready/Data Set ReadyDSR
7Signal ground/common returnSG
8Received line signal detector/
9Reserved for data set testing/
10Reserved for data set testing/
11Unassigned/
12Secondary received line signal detector/
13Secondary Clear To Send(S)CTS
14Secondary Transmitted Data(S)TxD
15Transmission signal element timing/
16Secondary Received Data(S)RxD
17Receiver Signal Element Timing(DCE)/
18Local Loopback
19Secondary Request To Send(S)RTS
20DTE Ready/Data Terminal ReadyDTR
21Remote Loopback/Signal Quality Detector /
22Ring IndicatorRI
23Data Signal Rate Selector/
24Transmit signal element timing (DTE)/
25Test Mode/
SpecificationsRS232
Mode of operationSingle ended
Receiver Input Resistance3K to 7K Ohms
Driver load impedance3K to 7K Ohms
Receiver input sensitivity+/-3V
Receiver input voltage range+/-15V
Slew rate(max)30 V/µS
Max. driver current in high impedance state+/-6mA at +/-2V
Max. driver output voltage+/- 25 V
Maximum data rate460kbps
Maximum cable length50 feet
Number of drivers/receivers on one line1 driver, 1 receiver

Advantages of RS-232

  • Widely used for point-to-point connections between DCE and DTE devices.
  • Due to its simplicity, the RS-232 interface is supported in many devices.
  • Low cost.
  • No noise

Disadvantages of RS-232

  • The interface requires a separate transceiver chip, which increases system cost.
  • Used in single-master, single-slave configurations, not in single-master, multi-slave mode.
  • Low bandwidth.
  • Limited cable length.
  • Increased power consumption.
Application of RS232 cable
Application of RS232 cable

RS-232 cables are widely used for computer serial interface peripheral connections, such as connecting a computer to a printer or modem, and it is also used in industrial automation for connecting sensors and other devices to a control system.

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