Unit AIN4-20mA

SKU:U162

Description

Unit AIN4-20mA is a single-channel 4~20mA current analog measurement unit. It uses the STM32G030F6 main control chip and communicates with the M5 host via I2C. It supports switching between internal or external power supply wiring modes through jumper caps. The onboard power isolation chip and built-in op-amp circuit can accurately measure external current sensors, ensuring signal accuracy and system safety. It is suitable for fields such as power system equipment monitoring, motor control, energy management, and automation and industrial process control.

Features

STM32
I2C communication
Supports 2 or 4-wire sensors, switchable via jumper caps
Built-in electrical isolation chip
Supports Arduino, UIFlow, and other programming platforms

Includes

1 x Unit AIN4-20mA
1 x VH3.96-4.0P
1 x HY2.0-4P Grove connection cable (20cm)
3 x Jumper caps

Applications

Power system equipment monitoring
Motor control
Energy management
Automation and industrial process control

Specifications

Specification	Parameter
MCU	STM32G030F6 (64 Kbytes of Flash/8 Kbytes of SRAM)
Signal Isolation Chip	HCNR200
Op-Amp Chip	SGM321YC5/TR
I2C Communication Address	0x55
IN+ and IN- Input Impedance Typical Value	200Ω
Operating Temperature	0 ~ 40°C
Product Dimensions	56 x 24 x 12mm
Packaging Dimensions	136 x 92 x 13mm
Product Weight	8.2g
Gross Weight	15.6g

Learn

Jumper Cap Connection and Instructions

If your current-type sensor already has external power, connect the jumper cap as shown in the left image.
If your current-type sensor does not have external power, connect the jumper cap as shown in the right image, and connect an appropriate external power supply to the AIN4-20mA Unit interface as needed.