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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| + | ==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: [https://www.mikroe.com/m-bus-slave-click MIKROE-4137 M-BUS SLAVE CLICK] | ||
| + | Transceiver example: [https://download.mikroe.com/documents/datasheets/tss721a_datasheet.pdf TI-TSS721A] | ||
| + | |||
| + | See [https://m-bus.com/documentation-wired/04-physical-layer M-BUS physical layer]] | ||
==Links== | ==Links== | ||
Revision as of 07:01, 15 December 2022
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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
See M-BUS physical layer]
Links
- https://m-bus.com/ (Good documentation)