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ModBus-RJ45-Breakout-2

the78mole·ModBus-RJ45-Breakout-2

ModBus-RJ45-Breakout-2 layout, top view — open source board by the78mole

About the ModBus-RJ45-Breakout-2

ModBus-RJ45-Breakout-2 is an open source PCB design by the78mole, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 87 × 68 mm, with 116 components from 39 distinct parts.

Other key parts include the FT2232D, WE-TVS-82400102, MAX485E, ADM2687E and 93LC46B. By type, the board carries 37 capacitors, 37 resistors, 8 ICs, 8 connectors, 8 jumpers and 7 diodes.

It belongs with the dev boards & breakouts and usb & debug tools designs in this gallery.

From the project

The second iteration of the breakout with a Dual-USB-Serial-Converter (FT2232)

Here are some images of the first prototype, assembled with isolating RS485 transceivers. Echo already works, real testing on a ModBus will take place soon.

This repository includes an automated workflow that generates production-ready files for PCB manufacturing and assembly. The workflow creates:

- Gerber Files - Ready for PCB manufacturer submission - Drill Files - For via and hole drilling - Schematic PDF - Complete circuit documentation - Interactive BOM - HTML component placement guide - 3D STEP Model - For mechanical design verification - PCB Renders - Professional visualizations and…

ModBus-RJ45-Breakout-2, from the project README
From the project README

Main components on the ModBus-RJ45-Breakout-2

FT2232DWE-TVS-82400102MAX485EADM2687E93LC46B

ModBus-RJ45-Breakout-2 bill of materials (BOM)

116 components, 39 distinct parts.

QtyPartRefs
1
FT2232D
U1
2
WE-TVS-82400102
U2, U6
2
MAX485E
U3, U7
2
ADM2687E
U4, U8
1
93LC46B
U5
1
BSP250
Q1
1
6MHz
Y1
2
RJ45_Weidmueller_2562920000
J1, J2
1
Bus_2
J3
1
BUS_1
J4
1
USB_B_Mini
J5
1
2X04
J6
2
2734-104
WAGO 2734-104
WAGO
J7, J8
1
449-440-45
APRA 449-440-45
DRA1
2
500mA
F1, F2
1
SH_GND_B
JP1
1
SH_GND_A
JP2
4
VCC_BR
JP3, JP4, JP6, JP7
2
GND_BR
JP5, JP8
5
Probe
TP1, TP6, TP28, TP34, TP35
Show 19 more
QtyPartRefs
4
green
D1, D2, D3, D6
2
yellow
D4, D5
1
red
D7
1
FB
L2
5
1n
C1, C31, C32, C33, C34
1
4u7
C2
21
100n
C3, C6, C7, C8, C9, C10, C11, C12 +13
2
27p
C4, C5
8
10u
C13, C16, C17, C20, C23, C26, C27, C30
2
0
R1, R16
8
np
R2, R8, R10, R12, R14, R33, R34, R35
8
1K
R3, R13, R19, R20, R24, R25, R29, R32
10
27
R4, R6, R15, R17, R18, R21, R22, R23 +2
2
120
R5, R28
2
1K5
R7, R9
1
470
R11
1
2K2
R26
1
10K
R27
2
0
R30, R31

ModBus-RJ45-Breakout-2 design files

The KiCad project lives in the the78mole/ModBus-RJ45-Breakout-2 repository on GitHub; these links point at the commit this page was built from.

ModBus-RJ45-Breakout-2: common questions

How big is the ModBus-RJ45-Breakout-2?

The ModBus-RJ45-Breakout-2 measures 87 × 68 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ModBus-RJ45-Breakout-2?

116 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the ModBus-RJ45-Breakout-2 design files?

From the the78mole/ModBus-RJ45-Breakout-2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ModBus-RJ45-Breakout-2 design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which the78mole chose for the repository.

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