This is a receiver for turning on/off continuous current for lighting, motors, Hobby color light signals (74371, 74380, 74391), and other electrical accessories. The m 84 supports the digital formats Motorola, DCC, and mfx. The digital address can be set by means of coding switches or by means of the programming track in 4 steps. The address range in the Motorola format is up to 320 and in the DCC format up to 2040. The m 84 has 8 relays in 4 galvanically separated groups for switching users. Using the 66360/66365/66367 switched mode power pack allows you to achieve the bi-stable state of the relays and to store the switching status. 4 Hobby color light signals and 4 Hobby distant signals can be controlled with the simultaneous switching capability of the track current. In addition, the m 84 has 8 inputs for manually switching the relays (similar to the 7244 universal relay). The m 83 and m 84 decoders can be arranged in any sequence. Connections on the decoders are done by means of set-screw terminal clips. The maximum current load per group is 5 amps.