These form the heart of the  SIMPLEBUS System, and can be located in the Security Manager`s cabin / Common area / Utility area of the apartment complex.The transformers, mixer power-supplies, switching devices, relays and interfaces come in standard DIN Rail mountable modules, and can be neatly tucked away in a DIN-Rail Junction-Box.They provide the necessary power supply, control and communication signals to, and form the interface between the External and Internal Units for the audio and video signals.
.