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Compare serial communication protocols RS-232C and RS-485.
written 5.2 years ago by | • modified 2.2 years ago |
Mumbai University > Electronics Engineering > Sem 6 > Embedded System and RTOS
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written 5.2 years ago by | • modified 2.2 years ago |
Mumbai University > Electronics Engineering > Sem 6 > Embedded System and RTOS
written 5.2 years ago by |
Comparison of RS232 and RS485:
Specifications | RS232 | RS485 |
---|---|---|
Mode of Operation | Single Ended | Differential |
Total Number of Drivers and Receivers on One Line (One driver active at a time for RS485 networks) | 1 Driver 1 Receiver | 32 Driver 32 Receiver |
Maximum Cable Length | 50 FT. | 4000 FT. |
Maximum Data Rate (40ft. - 4000ft. for RS422/RS485) | 20kb/s | 10Mb/s-100Kb/s |
Maximum Driver Output Voltage | +/-25V | -7V to +12V |
Driver Load Impedance (Ohms) | 3k to 7k | 54 |
Slew Rate (Max.) | 30V/uS | N/A |
Receiver Input Voltage Range | +/-15V | -7V to +12V |
Receiver Input Sensitivity | +/-3V | +/-200mV |
Receiver Input Resistance (Ohms) | 3k to 7k | $\gt =12k$ |