M-BUS-EK Datasheet, PDF (14/20 Pages) Silicon Laboratories – AC to DC power adapter

Wireless M-Bus-EK
13. Header Descriptions
Headers J10 and J11 may be configured to select the Monitor section power source.
Table 1. Monitor Section Power Options
Monitor Section Power Source
USB Bus Power
AC to DC Power Adapter
3.6 V Lithium Battery
J10
Short 2-3
Short 1-2
Short 1-2
J11
Remove Shorting Block
Short 1-2
Short 2-3
Header J12 may be used to select the power source for the Meter Section.
Table 2. Meter Section Power Options
Meter Section Power Source
USB Bus Power
AC to DC Adapter
3.6 V Lithium Battery
J12
Short 1-2
Short 1-2
Short 2-3
Header J5 may be used to select the power source for the Meter LCD. This includes the CP2400 Meter LCD
controller (U3). Normally the LCD will be powered from the same source as the Meter section, as selected above.
Alternatively, the LCD may be powered from an MCU port pin. This provides a lower current consumption when the
LCD is inactive.
Table 3. Meter LCD Power Options
Meter LCD Power Source
Meter Section Power Source
C8051F930 Port Pin P0.0
J5
Short 2-3
Short 1-2
Headers J7-9 may be used to select which components in the Meter section are included in the current
measurement.
Table 4. Current Measurement Options
Header
J7
J8
J8
Component
C8051F930 MCU
Si4431 EZRadioPRO
CP2400 LCD Controller
Enabled
Short 1-2
Short 1-2
Short 1-2
Disabled
Short 2-3
Short 2-3
Short 2-3
14
Rev. 0.1