MicroBCU2: Difference between revisions
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=== Soldering the Kit === | === Soldering the Kit === | ||
MicroBCU2 comes as a kit where the big parts on the bottom side have to be soldered: | MicroBCU2 comes as a kit where the big parts on the bottom side have to be soldered: | ||
C4 | *C4 - 100µF / 35V electrolytic capacitor. Polarization is important, refer to silkscreen or photo | ||
C41 | *C41 - 1µF MLCC 1206 | ||
L1 and L2 | *L1 and L2 - 220µH inductors | ||
R1 | *R1 - 22R resistor 2512 | ||
J1 | *J1 - 7x1 2.54 pin header (or whatever you need to connect to your host PCB) | ||
*D1 - SS16 reverse polarity protection diode. . Polarization is important, refer to silkscreen. The bar on the diode should match the bar on silkscreen. | |||
*D2 - SMAJ40CA TVS diode | |||
I recommend to solder the parts in this order: L1, L2, C4, C41, R1, D1, D2, J1 | |||
=== Deactivate / Change VCC2 === | === Deactivate / Change VCC2 === | ||
Revision as of 11:54, 29 November 2020
| MicroBCU2 | |
|---|---|
 | |
 | |
| Developer | SirSydom |
| Status | beta |
| Version | V00.20 |
| Microcontroller/Board | universal |
Description
A Bus Coupler Unit (BCU) / KNX Transveiver which supplies the connected device with power from KNX Bus and provides a bus interface at OSI Layer 2.
Hardware
- IC: NCN5120 (ready for NCN5121 / 5130)
- Size: 23 x 19 x 9 mm
- Voltage 1: 3.3V
- Voltage 2 (optional): 5V (default), can be changed: 3.3V - 21V
- Max. current: up to 100mA
- UART: 19200bps 8E1 / 3.3V
User Documentation
Soldering the Kit
MicroBCU2 comes as a kit where the big parts on the bottom side have to be soldered:
- C4 - 100µF / 35V electrolytic capacitor. Polarization is important, refer to silkscreen or photo
- C41 - 1µF MLCC 1206
- L1 and L2 - 220µH inductors
- R1 - 22R resistor 2512
- J1 - 7x1 2.54 pin header (or whatever you need to connect to your host PCB)
- D1 - SS16 reverse polarity protection diode. . Polarization is important, refer to silkscreen. The bar on the diode should match the bar on silkscreen.
- D2 - SMAJ40CA TVS diode
I recommend to solder the parts in this order: L1, L2, C4, C41, R1, D1, D2, J1
Deactivate / Change VCC2
Enable High Bus current
Schematic
KiCad
Developer Documentation
Links
Vorstellungs- / Entwicklunsthread im KNX User Forum [1]