4-20mA Sensor Brick

Overview

4~20mA Sensor Brick is an electronic brick module that can be used to test electronic current loop from 4mA to 20mA and support type2,3,4 current output. With a 5V to 24V DC-DC power boost convertor, its max current output can be 150mA, which can be for equipment use.

Go shopping 4-20mA Sensor Brick(IM140819001)

Features

• Compatible with the mainstream 2.54 and 4-pin Grove interface in market
• Compatible with type2,3,4 electronic current loop
• With use of M4 standard fixed holes, compatible with M4-standard kits such as Lego and Makeblock.

Specification

PCB size	40.6mm X 29mm X 1.6mm
Power supply	5V DC
Compatible interfaces	2.54 4-pin interface and 4-pin Grove interface(1)

Electronic Characteristics

Parameter	Min.	Typical	Max.	Unit
Power supply	4.5	5	5.5	VDC
Input measurement current	4	-	20	mA
Output Current(DCDC)	-	-	150	mA

Hardware

	JP1	JP2
Connected	CH1 Type 2/3	CH2 Type 2/3
Disconnected	CH1 Type4	CH2 Type4

Loop current type

• Type 2 loop current

• Type 3 loop current

• Type 4 loop current

The relationship between output voltage and input current in channel 1,2

In theory, their relationship can be described into this formula:

Vout1 = R1 * Iin1 * 2

Vout2 = R2 * Iin2 * 2

R1=R2=100ohm

Note: error ±2% in practical test.

Instruction

• 1. Upload the demo File:4_20mA_demo.zip into Iteaduino UNO
• 2. Connect the sensor brick and UNO as following picture. S1->A4 and S2->A5.

• 3. Measure current loop

When access in type2,3 loop current, please connect JP1 or JP2, both 1In- and 2In- is equal to connecting ground, 1In+ and 2In+ are connected with the current pins to be measured.

When access in type4 loop current, connect the input end to 1In+ or 2In+, the output end to 1In- or 2In-, and unplug JP1 or JP2 simultaneously.

Download

• Schematic--File:IM140819001-4~20mA Sensor Brick-schematic.pdf