Difference between revisions of "M-BUS"
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==Physical layer== | ==Physical layer== | ||
| − | Master to slave: 36 Volt = 1 - 24 Volt = 0 | + | *Master to slave: 36 Volt = 1 - 24 Volt = 0 |
| − | Slave to Master: Draws < 1,5 mA = 1 - draws11-20 mA = 0 | + | *Slave to Master: Draws < 1,5 mA = 1 - draws11-20 mA = 0 |
| − | Baudrate: 300 - 9600 | + | *Baudrate: 300 - 9600 |
| − | Cable: Two-wire standard telephone cable (JYStY N20.8 mm) | + | *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) | + | *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 | + | *Power: Up to 27 Watt through the cable = 0,75 A |
| − | Slaves: Up to 250 in a single segment | + | *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 | + | *Repeater: Also called a master and typically is an M-BUS to RS232 converter attached to a host |
| − | Plug: No standard | + | *Plug: No standard |
| − | M-BUS slave example: [https://www.mikroe.com/m-bus-slave-click MIKROE-4137 M-BUS SLAVE CLICK] | + | *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] | + | *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]] | + | *See [https://m-bus.com/documentation-wired/04-physical-layer M-BUS physical layer]] |
==Links== | ==Links== | ||
Revision as of 07:02, 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)