Wi reless M-Bus-EK

Rev. 0.1

3

Figure 3. Monitor Section

The monitor section includes the following components:

The C8051F342 microcontroller is used to monitor the meter current consumption, display the current consumption

on the eight-digit alphanumeric display, and communicate over USB with the PC applications on the PC host. The

discrete current amplifier and integrator are used with the internal comparator and timer to calculate the average

current consumption.

A second CP2400 is used to drive the monitor display. The monitor display is an alphanumeric display with eight

14-segment characters. The monitor display is normally used to display average current consumption. Pressing

the Mode button will alternately display the elapsed time or output pulse frequency.

Three pin headers are provided for different power options. The Wireless M-Bus demo board may be powered from

a USB, a wall adapter, or a 3.6 V long-life Lithium battery. The meter section can be powered from the battery while

the monitor section is powered from USB or wall power.

C8051F342

CP2400