ENANCER Electrónica S.A. Page 3 of 17
Rua Max Grundig 9
4705-820 Braga Portugal info@only-smartbuildings.com
Tel: +351 253 221 484 www.only-smartbuildings.com
Introduction
This document is intended to guide the work on site of the installer ONLY automation system installer. The next
chapters explain how the installation should be made, the precautions to take and the way to test and configure
the system.
It is essential to respect it in order to achieve a proper and trouble-free installation.
ONLY Automation system
The modules of the ONLY automation system allow load switching, dimming, gate command by impulse and
command of shutters, blinds, curtains or awnings.
The modules of the automation system derive their power directly from 230V, being the Neutral the ground of the
system.
The ONLY modules communicate via a BUS line, by determining the presence or absence of tension on this
referred line. This tension is generated in a BUS line feeder and is short-circuited with the neutral by the modules
during a communication. The pulses in the BUS line codify a communication.
For all modules to communicate with each other, they must all be connected to the BUS. Connection is made as a
star, i.e., all modules are connected to the same BUS.
Fig. 1: Star type connection.
Since the ground of the system is the Neutral, the BUS line is also an active line. This fact simplifies the piping
installation.
Electrical piping and threading
ONLY provides electronic commands for switching, dimming, shutter control, gate control or commands without
function, all for in-wall box installation. It is therefore possible to replace mechanical commands by electronic
ONLY commands with the condition that they can receive the lines Phase, Neutral and BUS in order to work.
Architecture of electrical conduits
The electrical piping of a house with ONLY is similar to a conventional installation because the switching
is done on the in-wall commands, as if it were a mechanical switch.
The diagram below illustrates this situation.
