Wireless M-Bus-EK
14 Rev. 0.1
13. Header Descriptions
Headers J10 and J11 may be configured to select the Monitor section power source.
Header J12 may be used to select the power source for the Meter Section.
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.
Headers J7-9 may be used to select which components in the Meter section are included in the current
measurement.
Table 1. Monitor Section Power Options
Monitor Section Power Source J10 J11
USB Bus Power Short 2-3 Remove Shorting Block
AC to DC Power Adapter Short 1-2 Short 1-2
3.6 V Lithium Battery Short 1-2 Short 2-3
Table 2. Meter Section Power Options
Meter Section Power Source J12
USB Bus Power Short 1-2
AC to DC Adapter Short 1-2
3.6 V Lithium Battery Short 2-3
Table 3. Meter LCD Power Options
Meter LCD Power Source J5
Meter Section Power Source Short 2-3
C8051F930 Port Pin P0.0 Short 1-2
Table 4. Current Measurement Options
Header Component Enabled Disabled
J7 C8051F930 MCU Short 1-2 Short 2-3
J8 Si4431 EZRadioPRO Short 1-2 Short 2-3
J8 CP2400 LCD Controller Short 1-2 Short 2-3
