* Replaced voltage reference with low IZT 5V6 zener diode (cheaper bu…

…t increases power consumption on the eBus side by ~200uA)

* C2/C4 changed to 10u
* R6/R7 adjusted for ~5V VCC
* AZV3002 as replacement for TSX3702
* USB Type-B port replaced by Type-C port
* ESC protection for USB port
* Phoenix Contact MKDSN connector replaced by MSTBA

README.md

@@ -1,11 +1,11 @@
-# ebus2usb - 2TE DIN Rail eBUS to USB Interface
+# ebus2usb - 2TE DIN Rail eBUS to USB Type-C Interface
 
 eBUS is a serial 2-wire serial data-bus, often used in heating, solar energy, and other building automation systems. This project provides an interface to access an eBUS via USB.
-It uses a series transistor regulator circuit with a ZRC400 voltage reference to extract the operating voltage from the eBUS, an ADuM1201 for the galvanic isolation, and a CH340N for the UART to USB conversion.
-Power consumption on the eBUS side is between 450uA (eBUS idle low/8V) and 700uA (eBUS idle high/24V), making the interface qualify as a class 0 device with respect to the eBUS specification.
+It uses a series transistor regulator circuit with a low IZT zener diode to extract the operating voltage from the eBUS, an ADuM1201 for the galvanic isolation, and a CH340N for the UART to USB conversion.
+Power consumption on the eBUS side is between 620uA (eBUS idle low/8V) and 920uA (eBUS idle high/24V), making the interface qualify as a class 0 device with respect to the eBUS specification.
 It has been designed to fit into an [CNMB/1/2](https://www.camdenboss.com/camden-boss/cnmb12-din-rail-module-box%2c-polycarbonate-enclosure%2c-industrial-iot-electronics-housing/c-23/p-18541) 2TE DIN rail enclosure by CAMDENBOSS. The interface is intended to be used with [ebusd](https://github.com/john30/ebusd/) and can be used as a replacement for an [eBUS Adapter v2](https://adapter.ebusd.eu/v2/).
 
-![Images](ebus2usb-img-v0.8.jpg)
+![Images](ebus2usb-img-v0.9.jpg)
 
 ## Schematic
 
@@ -21,25 +21,29 @@ When ordering at JLCPCB, remove the mouse bites and cut the boards yourself. Oth
 
 |Designator|Footprint|Quantity|Value|LCSC Part #
 |:---|:---|:---|:---|:---
-|C1, C2|C0805|2|1u|C28323
+|C1, C2|C0805|2|10u|C15850
 |C3, C4, C5, C6, C7, C8|C0805|6|100n|C28233
 |D1, D2|SOT-23-3|2|BAV99|C2500
-|D3|SOT-23-3|1|ZRC400, LM4040, ADR5044|C2156870, C2156681, C202194, C659602
-|D4|SOD-123|1|24V/1W|C209605, C438336
-|D5|SOD-123|1|7V5/1W|C209594, C382950
+|D3|SOT-123|1|5V6, Onsemi MMSZ4690*|C152307
+|D4|SOD-123|1|24V/1W, KDZVTR24B, MM1W24|C209605, C438336
+|D5|SOD-123|1|7V5/1W, KDZVTR7.5B, MM1W7V5|C209594, C382950
 |D6, D7, D8|D3.0mm|3||[CHANZON 3mm diffused LED](https://www.aliexpress.com/item/1936229691.html)
-|J1|MKDSN1,5_2-5,08|1|MKDSN1,5/2-5,08|C91153
-|J2, J4|Molex_PicoBlade_53047-0210|2|Molex 53047-0210|C114130
-|J3, J5|Molex_PicoBlade_53047-0410|2|Molex 53047-0410|C504989
-|J6|Molex_670688000|1|Molex 67068-8000|C114097
+|J1|MSTBA_2,5_2-G-5,08|1|MSTBA 2,5/2-G-5,08|C3697
+|J2, J5|Molex_PicoBlade_53047-0210|2|Molex 53047-0210|C114130
+|J3, J6|Molex_PicoBlade_53047-0410|2|Molex 53047-0410|C504989
+|J4|HRO_TYPE-C-31-M-12|1|HRO TYPE-C-31-M-12|C165948
 |Q1, Q2|SOT-23-3|2|BC817-40, S9013J3|C52801, C6749
 |R1|R0805|1|0R|C17477
-|R2, R3, R4, R9|R0805|4|100K|C149504
+|R2, R3, R4, R11|R0805|4|100K|C149504
 |R5|R0805|1|4K7|C17673
-|R6|R0805|1|300K|C17616
-|R7|R0805|1|51K|C17737
+|R6|R0805|1|270K|C17589
+|R7|R0805|1|68K|C17801
 |R8|R0805|1|2M|C26112
-|R10, R11|R0805|2|22K|C17560
-|U1|SO08|1|TSX3702|C2970396
+|R9, R10|R0805|2|5K1|C27834
+|R12, R13|R0805|2|22K|C17560
+|U1|SO08|1|AZV3002, TSX3702|C5123396, C2970396
 |U2|SO08|1|ADuM1201, π122U31|C9669, C471590
 |U3|SO08|1|CH340N, CH330N|C2977777
+|U4|SOT-23-6L|1|SRV05-4|C85364
+
+\* Low IZT of 50uA is required. Other manufacturers than Onsemi may not qualify. For example, MMSZ4690 from Jiangsu Changjing Elec. Tech. is not recommened.