Decode RS-232, RS-485, & RS-422

Decode RS-232, RS-485, & RS-422

The new Saleae Logic products (Logic 4, Logic 8, Logic Pro 8, Logic Pro 16) can be used to read and decode RS-232, RS-485, and RS-422 data up to +/- 25V.
Our older Logic products (Original Logic, Logic16) have a 0V to 5V absolute maximum range. Therefore, neither product can be used to measure signals outside of this range. That limits its usage for directly recording RS-232, RS-485, and RS-422, which exceed this range in many cases.

Precautions to Avoid Damage to Saleae Logic

These protocols typically operate at higher voltages, sometimes up to +/- 25V. For this reason, there are several precautions and setup requirements to consider beforehand, which you can read more about below.

Use the Async Serial Analyzer

RS-232, RS-485, and RS-422 transmit data via asynchronous serial communication. For this reason, you can use our Async Serial Analyzer to decode the data. You can view our setup guide below.
Last modified 3yr ago