Difference between revisions of "M-BUS"
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|Meter-BUS or short M-BUS which is designed mainly for remote reading of water meter, gas or electricity meters - not to be confused with [[Smart-BUS]] or short S-BUS is designed mainly for home automation | |Meter-BUS or short M-BUS which is designed mainly for remote reading of water meter, gas or electricity meters - not to be confused with [[Smart-BUS]] or short S-BUS is designed mainly for home automation | ||
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| + | [[image:MBusLogo240.svg|right|200px]] | ||
==Physical layer== | ==Physical layer== | ||
*Master to slave: 36 Volt = 1 - 24 Volt = 0 | *Master to slave: 36 Volt = 1 - 24 Volt = 0 | ||
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*M-BUS master example: [https://www.mikroe.com/m-bus-master-click MIKROE-3880 M-BUS MASTER CLICK] | *M-BUS master example: [https://www.mikroe.com/m-bus-master-click MIKROE-3880 M-BUS MASTER CLICK] | ||
*[https://oms-group.org/en/open-metering-system/oms-specification OMS-Group] - Extension of M-BUS and wM-BUS | *[https://oms-group.org/en/open-metering-system/oms-specification OMS-Group] - Extension of M-BUS and wM-BUS | ||
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*See [https://m-bus.com/documentation-wired/04-physical-layer M-BUS physical layer]] | *See [https://m-bus.com/documentation-wired/04-physical-layer M-BUS physical layer]] | ||
Latest revision as of 07:35, 22 November 2023
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Meter-BUS or short M-BUS which is designed mainly for remote reading of water meter, gas or electricity meters - not to be confused with Smart-BUS or short S-BUS is designed mainly for home automation |
Physical layer
- Master to slave: 36 Volt = 1 - 24 Volt = 0
- Slave to Master: Draws < 1,5 mA = 1 - draws11-20 mA = 0
- Baudrate: 300 - 9600
- Cable: Two-wire standard telephone cable (JYStY N20.8 mm)
- Max cable length: 350 Meter (Lower baud rates up to 1000 Meter - but restricted power not below 12 V max capacitance 180 nF)
- Power: Up to 27 Watt through the cable = 0,75 A
- Slaves: Up to 250 in a single segment
- Repeater: Also called a master and typically is an M-BUS to RS232 converter attached to a host
- Plug: No standard
- M-BUS slave example: MIKROE-4137 M-BUS SLAVE CLICK
- Transceiver example: TI-TSS721A
- M-BUS master example: MIKROE-3880 M-BUS MASTER CLICK
- OMS-Group - Extension of M-BUS and wM-BUS
- See M-BUS physical layer]
Links
- M-BUS Documentation (Loads PDF)
- m-bus Linux
- https://m-bus.com/ (Good documentation)
- libmbus is an open source library for the M-bus (Meter-Bus) protocol
- libmbus on github (Newest??)
- Kamstrup M-Bus mater Multiport 250D (PDF)
- Kamstrup MUTICAL 603 Heat Meter