Co je to MBUS

[Bad Gibbon]

Hmmm. Posli mi to pros?m, mysl?m tie subory na moj email....

Thanx...

Bad Gibbon

Jind?ich Franc wrote:

> PaPouch wrote:
> >
> > M-BUS je prumyslova sbernice , max 100m, max 250 zarizeni. Prenos je dost
> > podivny, jednim smerem se signal prenasi jako napeti a druhym smerem jako
> > proud. je na to obvod od Texase - TSS721. M-BUS ma definovan i vlastni
> > protokol.
> >
> > Pokud ovsem nejde o Measurement Bus, to je logicky protokol na fyzicke
> > vrstve RS485.
> >
> > S pozdravem
> > ing. Pavel Poucha
> >
> > Navstivte prosim nase stranky: www.pap-el.cz
> >
> > ----- P?vodn? zpr?va -----
> > Od: <rkanovsky@csas.cz>
> > Komu: Multiple recipients of list <hw-news@list.gin.cz>
> > Odesl?no: 28. ledna 2000 8:34
> > P?edm?t: Co je to MBUS
> >
> > > Na internetu jsem hledal nejake informace o me male nokii 3210 a narazil
> > > jsem na
> > > pojem MBUS. Co to vlastne je a k cemu to slouzii ?. Byl tam popsan i
> > nejaky
> > > interface pro pripojeni k PC (MAX232, dva tranzistory, stabilizator
> > napeti).
> > >
> > > Dik
> > >
> > > Roman K.
> > >
> > >
>
> P?r informac? k M-BUSu
>
> Prof.Dr.H.Ziegler:                                                                      Nov.1, 1996
>
> 30 reasons why to use an M-Bus interface
>
> I)      Technical reasons
>
>         1.)     Simple two wire bus interface for slave devices
>         2.)     Integrated remote powering of all slave interfaces
>         3.)     Optional integrated remote powering of slave devices (3.3V, 0.6mA each)
>         4.)     Slave device powering optionally from bus, battery or external/mains
>         5.)     Up to 250 slave devices per segment
>         6.)     Interchangable polarity
>         7.)     Arbitrary bus topologie (star, tree, net)
>         8.)     Maximum segment size: 1000m (f?r <=9600 Baud)
>         9.)     Maximum distance for 250 devices with standard telephone wiring: 350m
>         10.)    Maximum distance for 1 device: 10km
>         11.)    Larger nets/systems possible via transparent repeaters
>         12.)    Transmission baudrates: 300-38 400 Baud (includes mixed baudrate operation)
>         13.)    Isolation by isolated construction or via optocouplers
>         14.)    Optional reversible mains protection
>         15.)    Short circuit proof
> 16.)    Bus will not block for arbitrary single defect in a slave interface or device
> 17.)    Single chip solution for slave interfacing available
>         18.)    Automatic segment supervision and diagnosis
>         19.)    Safe data transmission via current sink technique
>         20.)    Can meet all EMC, ESD and EMI requirements
>         21.)    Tap proof because of data transmission via current modulation
>
> II)     Strategic reasons
>
>         1.)     Very low incremental cost per slave (Components <2 euro)
>         2.)     European standardisation (prEN1434, part 3)
>         3.)     M-Bus-User-Group for coordination of application and development
>         4.)     High acceptance (>700k p.a), especially in metering
>         5.)     System components (level converter, repeater, software) available
>         6.)     Increasing usage for sensors, actors, etc.
>         7.)     Physical layer (interface) independent of software protocols used
>         8.)     Any protocol with >=1 idle bit within 11 bits (e.g. stop bit of UART) usable
>         9.)     Works well with established world wide standard FT1.2 of IEC870-5.
>
> V p??pad? z?jmu tu m?m p?r soubor? s dokumentac?.
>
> --
> ___________________________________________________________________
> Jind?ich Franc                    mailto:franc@elsaco.cz
> ELSACO - Ing.Jindrich Franc       http://www.elsaco.cz
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