M-Bus Master Interface (Driver and Receiver)

Marcos Olandoski

Prodigy 55 points

Other Parts Discussed in Thread: TSS721A

Dear all

Does anybody has a schematic/circuit for a M-Bus Master Interface?

TI has a IC for M-Bus Slave.

Thank you

Best Regards

Marcos Olandoski

over 12 years ago

0 Thomas Kugelstadt over 12 years ago

TI__Mastermind 28265 points

Marcos, while it's not my department, TI has an M-Bus transceiver TSS721A. In the data sheet are a few application schematic diagrams. Also the attached MSP430 apps-note has an M-bus application included.

Also a good M-Bus website is http://www.m-bus.com/default.php .

regards, Thomas

MBUS-APPS.pdf

0 Marcos Olandoski over 12 years ago in reply to Thomas Kugelstadt

Prodigy 55 points

Dear Thomas

Thank you. But I already read all those information you had suggested. Everybody show you the slave interface, including TI, but you can't find any information about Master.

The TSS721A is a Slave IC.

Best Regards

Marcos Olandoski

0 Remo Reichel over 12 years ago in reply to Marcos Olandoski

Prodigy 10 points

Dear Marcos,

pleas take a look at:

http://www.solvimus.de/smart-metering/

There are module, level translators and gateways for M-Bus (master devices).

Please do not hesitate to contact me for further (and english) informations.

Best regards,

Remo Reichel.

0 efi rushinek over 7 years ago in reply to Remo Reichel

Intellectual 310 points

You can implement the master by using a DC/DC booster. Connect your UART TxD to a transistor. The transistor drain connects the DC/DC Vref through a resistor to GND. So you have a permanent resistor that is connected in parallel with switched resistor from Vref to GND. In this way you have the Master M-BUS voltages. The UART RxD should be driven by current sense component i.e. current to voltage OP

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M-Bus Master Interface (Driver and Receiver)