2 layers86 × 68 mm Modbus RJ45-Breakout, the printed circuit board in 3D

Modbus RJ45-Breakout

A breakout board for Dual-ModBus-over-Twisted-Pair (RJ45) with isolated converters option

Size: 86 × 68 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 86
Nets: 79
Pads: 320
Tracks, vias: 831, 239
Pours: 3
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 24 Apr 2023
Updated: 26 Apr 2023

Overview

Modbus RJ45-Breakout is an open-source printed circuit board by the78mole, from the the78mole/Modbus-RJ45-Breakout repository on GitHub. It is a 2-layer board of 86 × 68 mm with 86 parts on 79 nets, routed with 831 tracks and 239 vias.

It is built around the MAX485ED. Its parts include 28 capacitors, 16 resistors, 10 ICs, 10 connectors and 6 diodes. It belongs with the interfaces and adapters boards of this library.

Main components

MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICs

README

README.md

Modbus-RJ45-Breakout

A breakout board for Dual-ModBus-over-Twisted-Pair (RJ45) with isolated converters option

Front Back

Category and platform

Interfaces and adapters

Project files

Show this board on your page

https://pcbkit.io/boards/the78mole/Modbus-RJ45-Breakout

The board's own page, for a message or a post.

Source

Repository: the78mole/Modbus-RJ45-Breakout
Board file: Modbus-RJ45-Breakout.kicad_pcb
Commit: 01b8e73
Licence: Not stated

Parts

Qty	Value	Footprint	References
14	100n	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C3, C5, C7, C8, C9, C11, C15, C17, C19, C20, C21, C23, C26, C28
8	10u	Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C6, C10, C12, C18, C22, C24, C25, C27
6	VCC_BR	Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm	JP4, JP5, JP6, JP8, JP9, JP10
4	4u7	Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C2, C4, C14, C16
4	Conn_01x02	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J5, J6, J7, J8
4	M4	MountingHole:MountingHole_4.3mm_M4_DIN965	H1, H2, H3, H4
4	WE-TVS-824001	Package_TO_SOT_SMD:SOT-23-6	U1, U5, U6, U10
2	0	Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R1, R16
2	120	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R4, R5
2	1K	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R8, R13
2	1n	Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C1, C13
2	220	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R10, R15
2	22K1	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R6, R11
2	270	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R9, R14
2	47K5	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R7, R12
2	500mA	Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder	F1, F2
2	560	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R3
2	ADM2687E	Package_SO:SOIC-16W_7.5x12.8mm_P1.27mm	U4, U9
2	CP2102N-Axx-xQFN24	Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm	U2, U7
2	Conn_01x04	the78mole:Wago_734-164_1x04_P3.50mm_Horizontal	J3, J4
2	GND_BR	Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm	JP3, JP7
2	MAX485E	the78mole:SO-8_3.9x4.9mm_P1.27mm	U3, U8
2	RJ45_Weidmueller_2562920000	the78mole:RJ45_Weidmüller_2562920000_Horizontal	J1, J2
2	SolderJumper_2_Open	Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm	JP1, JP2
2	USB_B_Mini	the78mole:USB_Mini-B_Wuerth_65100516121_Horizontal	J9, J10
2	green	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D1, D2
2	red	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D3, D5
2	yellow	LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder	D4, D6

Similar boards

2 layers63 × 46 mm
Pi485
bvarner/pi485
An open-source TTL UART <-> RS485 converter, intended for a Raspberry Pi or Arduino
31 parts41MIT
2 layers150 × 50 mm
Esp32-led smps
lucysrausch/esp32-led-smps
230V main LED smps. 2x30W Constant Current.
179 parts30
4 layers96 × 172 mm
Servo cpu
wiciu15/servo2
Servo inverter for 3-phase AC motor with/out encoder feedback
167 parts29
2 layers60 × 30 mm
Scoring table hardware
GrappleRobotics/JMS
Another alternative field management system for the FIRST Robotics Competition.
30 parts18
2 layers68.6 × 53.3 mm
XyloShield
StefanKrupop/XyloShield
Shield for Arduino that hosts a RFM26W radio module and allows DMX-512 connectivity
19 parts17
2 layers257.1 × 166.2 mm
PiccoloBlack2021 14juillet v8sansMasse
SylvainVanIniitu/Piccolo-4C-Black
Piccolo MIDI stochastic sequencer
102 parts16
2 layers65 × 56.5 mm
Pool pi v1.1
ChaseDurand/Pool-Pi
Hardware+software solution for controlling a Goldline/Hayward Aqualogic pool control board over WiFi via a Raspberry Pi.
28 parts14
2 layers53 × 68.7 mm
EEC IV Reader
flxkrmr/eec-iv-reader-arduino
Arduino based diagnostics-tool for Fords EEC IV ECUs
39 parts14GPL-3.0

Questions

How big is the Modbus RJ45-Breakout PCB?

It measures 86 × 68 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Modbus RJ45-Breakout use?

86 parts, built around the MAX485ED. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Modbus RJ45-Breakout KiCad files?

From the the78mole/Modbus-RJ45-Breakout repository on GitHub, at the commit this page was made from: the board is Modbus-RJ45-Breakout.kicad_pcb and its schematic Modbus-RJ45-Breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

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

Its repository states no licence, so its author keeps all rights: ask the78mole before reusing the design.