Terminology » Data Communication » RS232 vs RS485: Interface Differences Explained

RS232 vs RS485: Interface Differences Explained

rs232 rs485 interface serial communication communication protocol

This page clarifies the differences between RS232 and RS485 interface types. You’ll also find links to information on RS422, SPI, CAN, and DigRF interface types.

RS232 vs. RS485: Key Specifications

Here’s a table summarizing the key differences between RS232 and RS485:

SpecificationsRS232RS485
Max. Distance SupportedAbout 50 feetAbout 4000 feet
Max Data rate supportedAbout 20 Kbps100 kbps to 10 Mbps
Application1 Driver with 1 Receiver (One to one)1 Driver and multiple receivers (about 32), multi-drop configuration
Voltage for logic 1 and logic 0Logic 0: +5 to +15 VDC, Logic 1: -5 to -15 VDCLoaded +/-1.5VDC, Unloaded +/-6VDC
Interface mode of operationSingle endedDifferential or balanced
Load impedance in Ohms3K-7K Ohms54 Ohms