DMR4IO Interface

DMR4IO is interface which allows connecting up to four radio stations to computer or server. This interface is particularly developed for Motorola DM3000 and DM4000 series stations. For old analog radios there is an option to order interface with PTT and SQL signal controler.

Each radio interface consists of USB port, audio IN, audio OUT, PTT and SQL signals. DMR4IO has integrated sound cards that are galvanically isolated with transformer. USB interfaces are protected with EMC filter and diodes. Interface has USB 2.0 connection to computer or server.

Hardware is plug and play on Microsoft Windows and Linux systems. Computer sees interface as four separated sound cards. Radio’s USB are connected to computer via USB hub. PTT and SQL
signals on analog radios can be controlled via integrated virtual serial connection.

Interface is powered with 12 V DC.

We also have DMR2IO which allows to connect two Motorola DM3000 or DM4000 series radio stations. This version has no support for SQL and PTT. IGN signal is fixed 12 V.

Datasheet DMR4IO
datasheet_4IO.pdf