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.
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BELDEN, 9841 (see https://www.belden.com/products/Cable/Electronic-Wire-Cable/RS-485-Cable)
CEAM, CPR 6003
TASKER, C521
FANTON, ACS 9841
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
if a cable is actually used as indicated, the shielding (in the following drawing highlighted in blue) must be connected ONLY IN ONE POINT to the zero of the power supply and where the cable is interrupted, to allow the connection of the various devices (in the example below a REG-DIN-8, a REG-EXP-8, a REG-THL sensor and a REG-OTG), the shielding must be spliced, but NOT connected to anything:
PHOTO TBD
The BUS cable that connects the devices (master, I/O expansions, combined temperature and humidity sensors, displays) as mentioned before MUST be wired "in/out"; do not create backbones or star connections:
PHOTO TBD
if the installation needs do not allow for in-out wiring (houses on several floors for example) it is possible to install signal repeaters/splitters (code RIP-RS485) which allow the bus to be split correctly:
PHOTO TBD
The BUS cable must NOT be closed in a loop, it must ALWAYS be OPEN!
PHOTO TBD
some very large systems may require multiple power supplies, in these cases the references (zero) of all the 12 Vdc power supplies of the regulation system must be short-circuited:
PHOTO TBD
Note
The choice to have multiple power supplies may depend on:
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The sizing depends on how the various elements are distributed along the bus, and therefore it is impossible to give general guidelines
In factIndeed, the problem is not the capacity of the power supply, which is almost always overabundant, but the voltage drop along the line
Assuming the worst case (such as that all the current, 5A for the PS60 for example, is absorbed at the end of the line, say even just 30 meters) leads to unrealistic situations, with cables with too large sections
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BUS ERRORS TROUBLESHOOTING
Gli errori bus fanno riferimento alla mancanza di comunicazione tra i componenti del sistema REG e se si verificano la spia Err bus sul Master è accesa e fissa. Prima di proseguire con quanto sotto indicato verificare che il cablaggio del bus sia stato fatto come indicato nella parte precedente.
Se la comunicazione viene ripristinata la spia Err Bus sparisce se si preme il tasto Reset da RegConfig (Pagina Configurazione 1) oppure da display REG tenere premuto il tasto OK all’interno del menu Informazioni – Allarmi/Err.Bus – Errore Bus indir finché l’errore non torna a zero. In alternativa togliere e ridare corrente al Bus errors refer to lack of communication between the components of the REG system and if they occur the Bus Err led on the Master is ON and fixed. Before continuing with what is indicated below, check that the bus wiring has been done as indicated in the previous part.
If communication is restored, the Err Bus led disappears if you press the Reset button from RegConfig (Configuration Page 1) or from the REG display, press the OK button in the menu Information – Alarms/Bus Error – Address Bus Error until the error does not return to zero. Alternatively, power OFF and ON the REG-DIN-8.
Nel momento in cui si presenta un errore bus fissoWhen a fixed bus error occurs:
Verificare il cablaggio e l’alimentazione del componente (sotto i 9 Vdc i componenti potrebbero non essere in grado di supportare la comunicazione via bus)
Provare ad invertire A con B
Verificare che A e B non siano in corto
Verificare che l’indirizzo del componente sia corretto, se lo si cambia ricordarsi di togliere e ridare corrente altrimenti non viene acquisito
Verificare di aver configurato l’indirizzo corretto anche sul REG
Verificare che tutti i componenti del progetto siano presenti, installati e alimentati
Scambiare il componente con un altro funzionante
Se il componente a questo punto funziona il problema è il cablaggio
Altrimenti resta il componente (verificare nuovamente punti 4 e 5)
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