AllSerial RS485 RS422

Phunkafizer·AllSerial·Slaveboards/RS485_422/Board/AllSerial_RS485_RS422.kicad_pcb

AllSerial RS485 RS422 PCB layout, top view — open source board by Phunkafizer

About the AllSerial RS485 RS422 PCB

AllSerial RS485 RS422 is an open source PCB design by Phunkafizer, published on GitHub under the MIT license. It is a 2-layer board measuring 67.4 × 44.8 mm, with 19 components from 9 distinct parts.

Other key parts include the 7402D and MAX485CSA. By type, the board carries 5 ICs, 5 capacitors, 5 resistors, 2 crystals and 2 connectors.

It belongs with the usb & debug tools and iot & wireless designs in this gallery.

From the project

An universal sophisticated USB-serial converter

SEE PROJECTHOMEPAGE UNDER https://www.seegel-systeme.de/2025/07/10/allserial

Over the course of time I had to work with many different devices which had to be connected via a kind of serial interface. There are lots of different cheap USB-serial adapters available, but no adapter was including all features I needed in a single device. Every USB-serial adapter has in common the USB Controller. So I came up with the idea having a masterboard providing all the common features like USB interface, isolation and diagnostic elements. The most used interfaces (RS232, RS485, TTL UART, TTY current…

AllSerial RS485 RS422, from the project README — From the project README

Main components on the AllSerial RS485 RS422

7402DMAX485CSA

AllSerial RS485 RS422 bill of materials (BOM)

19 components, 9 distinct parts.

Qty	Part	Footprint	Refs
1	7402D	SOIC-14_3.9x8.7mm_P1.27mm	IC1
4	MAX485CSA	SOIC-8_3.9x4.9mm_P1.27mm	IC2, IC3, IC4, IC5
1	ALLSERIALSLAVE	SlaveBoard	X1
1	AKL18X-10W	Metz_PT11310HBBN_182	X2
1	PinHeader_2x05_P2.54mm_Horizontal	PinHeader_2x05_P2.54mm_Horizontal	J1
1	Conn_02x03_Odd_Even	PinHeader_2x03_P2.54mm_Vertical	J2
5	100n	C_0805_2012Metric	C1, C2, C3, C4, C5
1	4k7	R_0805_2012Metric	R1
4	120	R_0805_2012Metric	R5, R22, R30, R31

AllSerial RS485 RS422 design files

The KiCad project lives in the Phunkafizer/AllSerial repository on GitHub; these links point at the commit this page was built from.

AllSerial RS485 RS422: common questions

How big is the AllSerial RS485 RS422 PCB?

The AllSerial RS485 RS422 measures 67.4 × 44.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the AllSerial RS485 RS422?

19 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the AllSerial RS485 RS422 design files?

From the Phunkafizer/AllSerial repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the AllSerial RS485 RS422 design in my own project?

Yes, under the terms of its MIT license, which Phunkafizer chose for the repository.

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