The DECODE MM20-24 is an industrial module that functions as a converter between RS232, RS485, and M-BUS communication protocols. It is designed to convert these different communication protocols, allowing communication to be established between different systems and components in professional applications. The module operates using an input voltage of 10 ÷ 28 VDC and can accommodate two potential-free contacts, one opto-isolated output, and one digital input. The module features protection against reverse polarity, surge current in dry contact, and electromagnetic disturbances. It is designed for use in harsh industrial applications and is available for both automatic installation on the DIN rail and manual installation.