Hello Friends,
Today we are talking about the RS485 Module, In this video we have demonstrated the data transmission through RS485. We have also shown the difference between RS232 and RS485.
RS232 and RS485 both are Serial communication Standards used in many Industries. Sensor Data loggers system generally use such type of communication standards.
RS232 & RS485 can be found in Applications like
1) Industrial Data Logger System
2) Medical Equipment's
3) Scientific Instruments
4) Robotic Arm
5) Remote Display System etc.
Difference Between RS232 & RS485
RS232
1.Signal are Voltage Level Based
2.Point to Point Line Configuration
3.Operational Distance less than 20Mtr
4.Full Duplex Mode
5.Maximum Transmission Rate 1Mbits/s
RS485
1.Signal are Differential Voltage based
2.Multidrop Line Configuration
3.Operational Distance up to 1200Mtr
4.Half Duplex Mode
5.Maximum Transmission Rate 10Mbits/s
More About RS232
RS232 is a Simple communication between two devices.
Transmitter of one device is connected with the receiver of another and vice versa.
Voltage between -3V to - 25 V as a logic 1( one)
while the voltage between +3 to +25V as a logic 0 (Zero)
Advantages:
1.Very widely used
2.Low Complexity
3.Supports Full Duplex Communication
Disadvantages :
1.Only Two device communication
2.Short distance communication
3.Chances of noise
More About RS485
RS485 is a supports multipoint communication up to 32 devices.
Differential signaling between devices called A & B
Voltage -200mV as a logic 1( one)
while the voltage +200mVas a logic 0 (Zero)
Advantages:
1.Multidrop communication support
2.Faster Transfer Speed as compare to RS232
3.Works over longer distance
4.Less chance of Noise
Disadvantages :
1.Not widely used.
2.Support Half Duplex Communication, only two device communicates at a time.
3.Require termination resistor.
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