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The REG system devices require a 12 Vdc power supply and a BUS connection, therefore a total of 4 wires. The REG bus uses the EIA-485 standard (formerly known as RS-485), so the first choice is to use cables specifically created for this type of bus.

The ideal installation is given by a twisted and shielded cable specific for EIA-485 BUS, such as:

Note

These models are given as examples of cables that have the suitable electrical characteristics; the electrical designer will have to verify the compliance of the chosen cable with the specific needs of the system: type of installation, fire resistance, etc.; BELDEN in particular has a whole family of EIA-485 cables, suitable for any type of installation).

The use of this type of cable and compliance with the "IN-OUT" wiring is MANDATORY as shown in the following image:

PHOTO TBD

Furthermore, it is important to underline that:

  • the devices order (REG-DIN-8/REG-EXP-8/REG-TH etc.) is NOT important, they must not be connected in any particular order

  • each device must be addressed and there cannot be two components with the same address

  • if the address is changed using a dip switch to any of the components, the power supply must be switch OFF and then ON again for the new address to be acquired

  • being the MASTER, REG-DIN-8 has no address

  • the 12 Vdc power cable and the bus cable (A and B) must NOT share the electrical conduits with the 230 Vac

Attention

  • nel caso in cui si utilizzi effettivamente un cavo come da indicazioni, la schermatura (nel seguente disegno evidenziata in azzurro e chiamata comunemente “calza”) va collegata SOLO IN UN PUNTO allo zero dell’alimentazione e dove il cavo è interrotto, per consentire il collegamento dei vari dispositivi (nell’esempio sotto un REG-DIN-8, una REG-EXP-8, un sensore REG-THL e un REG-OTG), la schermatura deve essere giuntata, ma NON collegata a nulla:

PHOTO TBD

  • Il cavo BUS che collega i dispositivi (centralina di controllo, espansioni, sensori combinati di temperatura e umidità, display) come detto prima DEVE essere cablato “entra/esci”;  non realizzare dorsali o collegamenti a stella:

PHOTO TBD