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Compare serial communication protocols RS-232C and RS-485.

written 5.8 years ago by teamques10 ★ 67k

•   modified 2.8 years ago

Mumbai University > Electronics Engineering > Sem 6 > Embedded System and RTOS

embedded system and rtos

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written 5.8 years ago by teamques10 ★ 67k

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	$\gt =12k$

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