Difference between revisions of "M-BUS"

Revision as of 15:49, 4 November 2023

	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

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
Newhaven display 2x20

@@ Line 19: / Line 19: @@
 *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://newhavendisplay.com/content/specs/NHD-C0220BiZ-FSW-FBW-3V3M.pdf Newhaven display 2x20]
 *See [https://m-bus.com/documentation-wired/04-physical-layer M-BUS physical layer]]