MM20-USB is interface converter intended for transparent readout and power supply of M-Bus slave devices. Converter is powered from USB port and galvanically isolated from the M-Bus line. LED indications show power supply presence, data transmit and receive. Data rate and format adjustment is performed according to M-Bus slave device. Converter is designed to withstand short circuit on M-Bus line. Drivers are installed automatically, if for some reason drivers are not recognized you can download them here.
MM20-USB is suitable for installation and service of M-Bus slave devices. In combination with a laptop, it is suitable for the local setting and reading of heat, water and electricity meters, and other devices that communicate according to M-Bus protocol. Converter acts on M-bus line as standard M-Bus master device which can sustain up to 20 M-Bus slave devices.
M-Bus master, up to 20 M-Bus slave devices, transparent protocol, data rate 300-9600bps;
Connection: pluggable screw terminal 5mm, 2.5mm2
quiescent current: 0-30mA, short circuit: 50-70mA with restart function, line voltage: 30.5V ± 5%, internal resistance <100 Ohm
M-Bus line length
> 12km@300bps, > 4km@2400bps, > 1km@9600bps cable JYSTY nx2x0.8
tranzorb on M-Bus line
USB 1.1 and USB 2.0 standard; Connection: USB (type B)
Data rate and format
Automatic, according to M-Bus slave device
On, Rx, Tx
From USB port – no additional mains adapter is required
-20 do 75°C
90 x 43 x 20 mm
M-Bus interface converter for transparent readout of up to 20 M-Bus slave devices.
*Minimum functionality kit needs to include the device and an appropriate power supply. Please note that all accessories are sold separately.