The two types of standard serial communication protocols are RS-232 and RS-485. Both are used to enable serial communication between devices, although they differed in number of ways. The difference between RS-232 and RS-485 can be seen in the type of data cable they use.
Definition of RS 232?
In the year 1962, the RS-232 serial cabling interface was created. It is the earliest cabling method for establishing a link between data terminal and data transmission equipment. For instance, a computer system can be connected to a printer.
Definition of RS 485?
The RS-485 is a serial interface, which was first introduced in 1998, is a technological development of the RS 232 serial cabling interface. Unlike RS-232, this communication protocol can support 32 linked devices, whereas RS-232 could only handle one.
Difference between RS-232 and RS-485 | RS-232 VS RS-485:
- RS 232 has 1 transmitter and 1 receiver only. While RS-485 has 32 transmitters and 32 receivers present on a single bus.
- The signaling type of RS-232 is unbalanced, whereas the signalling type of RS-485 is balanced.
- The RS485 data transfer rate is over 20 Mbps, but the RS-232 data transmission rate is only 10 kbps. The communication speed of RS-232 was a significant constraint, so RS485 was created to address it.
- RS-232 and RS-485 are data connection types that allow data to be sent between nodes in a network. The data transit between nodes is divided into two types: single-ended and differential. RS-232 is a single-ended data transport protocol. Because the data transport afforded by RS-232 was inadequate over long distances, the differential type RS 485 was adopted.
- In comparison to RS-485, RS-232 is less noise-resistant since 485 runs in differential mode, which lessens the impacts of ground shifts and induced noise in the network. This also aids in the resolution of data collision difficulties.
- The cable length of an RS232 cable is roughly 50 feet, which is fairly little in comparison to the 4000-foot cable length of an RS485 line. When the length of a RS 232 cable exceeds 50 feet, resistance and voltage loss becomes a problem.
- 232 provides receiver input resistance ranging from 3k to 7k ohms. With a value of more than 12k ohms, it is comparatively higher in the case of 485.
- Because it only connects two devices, the network topology offered by RS-232 is a point-to-point type. While the network topology enabled by RS-485 is multipoint in nature, this cabling strategy can connect numerous devices.
- RS-485 is utilized for transmission distances that are significantly longer than RS-232. This is due to the fact that RS232 has a slower transmission speed, making it inefficient for long-distance communication.
- The RS-485 driver load is 60 ohms, which is lower than the RS232 driver load, which is between 3k and 5k ohms.
The two types of standard serial communication protocols are RS-232 and RS-485. Both are used to enable serial communication between devices, although they differed in number of ways. The difference between RS-232 and RS-485 can be seen in the type of data cable they use.
Definition of RS 232?
In the year 1962, the RS-232 serial cabling interface was created. It is the earliest cabling method for establishing a link between data terminal and data transmission equipment. For instance, a computer system can be connected to a printer.
Definition of RS 485?
The RS-485 is a serial interface, which was first introduced in 1998, is a technological development of the RS 232 serial cabling interface. Unlike RS-232, this communication protocol can support 32 linked devices, whereas RS-232 could only handle one.
Difference between RS-232 and RS-485 | RS-232 VS RS-485:
- RS 232 has 1 transmitter and 1 receiver only. While RS-485 has 32 transmitters and 32 receivers present on a single bus.
- The signaling type of RS-232 is unbalanced, whereas the signalling type of RS-485 is balanced.
- The RS485 data transfer rate is over 20 Mbps, but the RS-232 data transmission rate is only 10 kbps. The communication speed of RS-232 was a significant constraint, so RS485 was created to address it.
- RS-232 and RS-485 are data connection types that allow data to be sent between nodes in a network. The data transit between nodes is divided into two types: single-ended and differential. RS-232 is a single-ended data transport protocol. Because the data transport afforded by RS-232 was inadequate over long distances, the differential type RS 485 was adopted.
- In comparison to RS-485, RS-232 is less noise-resistant since 485 runs in differential mode, which lessens the impacts of ground shifts and induced noise in the network. This also aids in the resolution of data collision difficulties.
- The cable length of an RS232 cable is roughly 50 feet, which is fairly little in comparison to the 4000-foot cable length of an RS485 line. When the length of a RS 232 cable exceeds 50 feet, resistance and voltage loss becomes a problem.
- 232 provides receiver input resistance ranging from 3k to 7k ohms. With a value of more than 12k ohms, it is comparatively higher in the case of 485.
- Because it only connects two devices, the network topology offered by RS-232 is a point-to-point type. While the network topology enabled by RS-485 is multipoint in nature, this cabling strategy can connect numerous devices.
- RS-485 is utilized for transmission distances that are significantly longer than RS-232. This is due to the fact that RS232 has a slower transmission speed, making it inefficient for long-distance communication.
- The RS-485 driver load is 60 ohms, which is lower than the RS232 driver load, which is between 3k and 5k ohms.
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