MicroBCU

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MicroBCU
MicroBCU top.png
MicroBCU bottom.png
Developer Eugen Burkowski
Status released
Microcontroller/Board universal


Description

A little Bus Coupler Unit with an UART interface

Hardware

  • IC: NCN5120
  • Size: 23 x 19 x 5.4 (10.3) mm
  • Voltage 1: 3.3V
  • Voltage 2 (optinal): 5V (default), can be changed: 3.3V - 21V
  • Max. current: up to 100mA
  • UART: 19200bps 8E1

User Documentation

the new version (R1.2) has to connectors:

  • 7x pin 2.54mm THT
  • 2x4 or 2x5 pin 1.27 SMD

MicroBCU pins.png

Attention: MicroBCU has no dedicated pins for WAGO terminal (Red/Grey)!

Developer Documentation

Build It

If you solder the MicroBCU yourself, be carefull: On (some?) PCV Rev 1.2 the solder print on the top (NCN-) side is wrong. The two capacitors C5 and C6 in the top right corner are switched - here you can see the correct soldering:

https://github.com/KONNEKTING/KonnektingHardware/blob/master/MicroBCU/R1.2/Board_top.pdf

Also be carefull wenn soldering the big capacitor C2: The solder print marks the + side of the capacitor, because this is the standard for tantalum capacitors. If you use aluminium capacitors, the - side is marked.

Links

[1] [2]