Parameters:
1. ** Electrical characteristics ** :
– ** Voltage range ** : Under no-load conditions, the RS-232 standard specifies the output signal voltage range of ±5V to ±15V. For example, the voltage of logic “1” is usually between -5V and -15V, and the voltage of logic “0” is between +5V and +15V, but there may be a certain deviation in practical applications.
– ** Short circuit current ** : The short circuit current of the driver is usually limited to about 100mA, which is to prevent excessive damage to the equipment in the case of failure such as short circuit.
– ** Input resistance ** : The input resistance at the receiving end is generally between 3KΩ and 7KΩ, which can ensure the accuracy and stability of the received signal and avoid signal distortion due to the mismatch of the input resistance.
2. ** Communication rate ** :
– ** Baud rate support ** : Common baud rates are 9600, 19200, 38400, 115200, etc., of course, some devices may also support other special baud rates. Different application scenarios may select different baud rates based on data transmission requirements.
– ** Data transfer rate ** : The actual data transfer rate is affected by factors such as baud rate, data bit, stop bit, and check bit. In an ideal situation, taking the 9600 baud rate as an example, 9600 bits of data can be transmitted per second, but in practical applications, the actual transmission rate may be lower than the theoretical value due to various factors.
3. ** Data format ** :
– ** Data bits ** : Can usually be set to 5, 6, 7 or 8 bits. The 5-bit data bit setup may have been used in some early devices or special applications, but 7 or 8-bit data bits are now more commonly used. For example, in ASCII transmission, it is common to use 7 or 8 data bits to represent a character.
– ** Stop bit ** : You can choose 1, 1.5, or 2 stop bits. The 1-bit stop bit is a common setting used to indicate the end of a data frame. In some special communication protocols or in the case of high data synchronization requirements, 1.5 bit or 2 bit stop bits may be used.
– ** Check bit ** : Select no check, odd check, or even check. No verification mode does not perform data verification, which has high transmission efficiency, but may cause data errors. Odd check and even check add a check bit to the data bit so that the number of “1” in the data is odd or even, so that the data is checked at the receiving end and the accuracy of the data is improved.
4. ** Interface Type ** :
– **DB9 Interface ** : This is the common RS-232 interface type with 9 pins. Among them, pin 2 is the receiving line (RXD), which is used to receive data; Pin 3 is the TXD for sending data; Pin 5 is the ground (GND), which is used to provide a reference point for the signal.
– **DB25 interface ** : This interface has 25 pins, but in practical applications, many pin functions are not used, and now it has been gradually replaced by the DB9 interface. However, in some older devices or specific application scenarios, the DB25 interface may still be used.
ADA232 communication modules are available in stock worldwide
Parameters:
1. ** Electrical characteristics ** :
– ** Voltage range ** : Under no-load conditions, the RS-232 standard specifies the output signal voltage range of ±5V to ±15V. For example, the voltage of logic “1” is usually between -5V and -15V, and the voltage of logic “0” is between +5V and +15V, but there may be a certain deviation in practical applications.
– ** Short circuit current ** : The short circuit current of the driver is usually limited to about 100mA, which is to prevent excessive damage to the equipment in the case of failure such as short circuit.
– ** Input resistance ** : The input resistance at the receiving end is generally between 3KΩ and 7KΩ, which can ensure the accuracy and stability of the received signal and avoid signal distortion due to the mismatch of the input resistance.
2. ** Communication rate ** :
– ** Baud rate support ** : Common baud rates are 9600, 19200, 38400, 115200, etc., of course, some devices may also support other special baud rates. Different application scenarios may select different baud rates based on data transmission requirements.
– ** Data transfer rate ** : The actual data transfer rate is affected by factors such as baud rate, data bit, stop bit, and check bit. In an ideal situation, taking the 9600 baud rate as an example, 9600 bits of data can be transmitted per second, but in practical applications, the actual transmission rate may be lower than the theoretical value due to various factors.
3. ** Data format ** :
– ** Data bits ** : Can usually be set to 5, 6, 7 or 8 bits. The 5-bit data bit setup may have been used in some early devices or special applications, but 7 or 8-bit data bits are now more commonly used. For example, in ASCII transmission, it is common to use 7 or 8 data bits to represent a character.
– ** Stop bit ** : You can choose 1, 1.5, or 2 stop bits. The 1-bit stop bit is a common setting used to indicate the end of a data frame. In some special communication protocols or in the case of high data synchronization requirements, 1.5 bit or 2 bit stop bits may be used.
– ** Check bit ** : Select no check, odd check, or even check. No verification mode does not perform data verification, which has high transmission efficiency, but may cause data errors. Odd check and even check add a check bit to the data bit so that the number of “1” in the data is odd or even, so that the data is checked at the receiving end and the accuracy of the data is improved.
4. ** Interface Type ** :
– **DB9 Interface ** : This is the common RS-232 interface type with 9 pins. Among them, pin 2 is the receiving line (RXD), which is used to receive data; Pin 3 is the TXD for sending data; Pin 5 is the ground (GND), which is used to provide a reference point for the signal.
– **DB25 interface ** : This interface has 25 pins, but in practical applications, many pin functions are not used, and now it has been gradually replaced by the DB9 interface. However, in some older devices or specific application scenarios, the DB25 interface may still be used.
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