M-BUS-2 / User Manual
8
Revision 07 - 14 September 2020
3 OPERATION
CONTACTS
Converter has 12 contact pairs which are M-BUS interfaces. Converter provide
connection up to 10 M-BUS devices. You can choose any 10 contact pairs. Wherein 1-2
contacts are M-BUS- (bot row), and 13-24 contacts are M-BUS+ (top row).
In order to increase the battery life, the physical level of the M-BUS interface is switch on
(supply voltage is applied to the outputs MBAS +, MBAS-) just before meter polling with a
programmable delay (the delay value is depends on the type of connected meter). The delay is
introduced for initializing own meter interface and its preparing for receiving data from the
converter. When the polling is complete, the physical M-BUS level is turned off.
There is SMA connector for an external antenna connection on the board.
SMA connector for
an external
LoRaWAN antenna
connection
