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2 CH 4-20 mA to voltage converter board

Fescron·2ch-4-20mA-converter·hardware/2ch-4-20mA/2ch-4-20mA.kicad_pcb

2 CH 4-20 mA to voltage converter board layout, top view — open source board by Fescron

About the 2 CH 4-20 mA to voltage converter board

2 CH 4-20 mA to voltage converter board is an open source PCB design by Fescron, published on GitHub. It is a 2-layer board measuring 46.4 × 46.4 mm, with 14 components from 8 distinct parts.

Other key parts include the LMP8640 and TEC2-0913. By type, the board carries 4 jumpers, 3 ICs, 3 connectors, 2 capacitors and 2 resistors.

It belongs with the test & measurement, sensors and dev boards & breakouts designs in this gallery.

From the project

1/2 channel 4-20 mA to voltage converter boards using LMP8640 current sense monitor.

This board converts two 4 - 20 mA signals to a voltage using a LMP8640 Current Shunt Monitor from Texas Instruments. To provide power to the 4 - 20 mA sensors a TEC2-0913 2W 15V Isolated DC-DC converter is used from Traco Power. Quick-connect terminals from Phoenix Contact are also used.

To allow for extensive testing three separate GND nets/planes and a lot of test points are used. They can be connected together using jumpers if necessary. The power supply can also be disabled and fully disconnected from the sensors using a jumper as well (wich can also be used to measure the in-line…

2 CH 4-20 mA to voltage converter board, from the project README
From the project README

Main components on the 2 CH 4-20 mA to voltage converter board

LMP8640TEC2-0913

2 CH 4-20 mA to voltage converter board bill of materials (BOM)

14 components, 8 distinct parts.

QtyPartRefs
2
LMP8640
U1, U2
1
TEC2-0913
U3
2
Conn_01x02
J1, J2
1
Conn_01x07
J3
3
Jumper_NO_Small
JP1, JP2, JP3
1
Jumper_NC_Small
JP4
2
100 nF
C1, C2
2
6,2 Ω
R1, R2

2 CH 4-20 mA to voltage converter board design files

The KiCad project lives in the Fescron/2ch-4-20mA-converter repository on GitHub; these links point at the commit this page was built from.

2 CH 4-20 mA to voltage converter board: common questions

How big is the 2 CH 4-20 mA to voltage converter board?

The 2 CH 4-20 mA to voltage converter board measures 46.4 × 46.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 2 CH 4-20 mA to voltage converter board?

14 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the 2 CH 4-20 mA to voltage converter board design files?

From the Fescron/2ch-4-20mA-converter repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the 2 CH 4-20 mA to voltage converter board design in my own project?

The repository has no license, so all rights stay with Fescron. Use it as a reference, and ask the author before reusing the design.

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