IMST iM871A - Wireless M-Bus Starter-Kit; Demo Board

User Manual
iM871A Wireless M-Bus Module Specification
iM871A_WMBus_UserManual.docx, Wireless Solutions, v1.2 Page 21
4.3 Current Consumption
Figure 4-3 shows schematically the current consumption of a meter device, that is triggered
by the host controller to transmit a Wireless M-Bus packet every 2 seconds. After transmission
the meter is able to receive commands from a master device (concentrator, data collector,
etc.). The rest of the time the meter remains in Low Power Mode.
µC
RX
T
X
~4mA
~21mA
~38mA
RX-Window
< 100nA
µC
RX
T
X
RX-Window
Low Power Mode (RTC off)
Low Power Mode (RTC off)
1s
2s 3s
Figure 4-3: Current Consumption