StamPLC IO

SKU:A176

Description

StamPLC IO is an electrically isolated IO expansion module designed for the StamPLC host and developed for industrial environments where high- and low-voltage circuits coexist. It provides two active analog acquisition channels, two solid-state relay outputs, and one mechanical relay output. The module supports signal acquisition from industrial active voltage and current sensors while controlling the on/off state of various load circuits. Its onboard STM32G030F6P6 main controller centrally manages external inputs and outputs, relay driving, address assignment, and I2C bus communication over the isolated channel. A hardware DIP switch allows the I2C address to be customized, enabling multiple modules to be connected in parallel or cascaded for flexible IO expansion.

The module integrates a CA-IS3020S digital isolator and B0505M-2WR3 isolated power module to provide complete electrical isolation between the communication bus and power circuit. This design effectively suppresses common-mode interference and surge impacts from sensors and field loads, significantly improving overall system stability. It is suitable for industrial automation applications such as power branch monitoring, low-voltage actuator driving, and sensor power management.

Tutorial

Arduino IDE

This tutorial explains how to program and control StamPLC IO using Arduino IDE.

Features

STM32G030F6P6 main controller
I2C communication interface
Onboard 4-position DIP switch for configuring the device I2C address
2 active analog signal detection channels
- Supports DC 0 ~ 10V voltage-output sensors
- Supports 0 ~ 20mA current-output sensors
2 solid-state relay control channels
- Supports switching DC 0 ~ 60V MAX 2.5A circuits
1 mechanical relay control channel
- Supports switching AC 250V@5A / DC 28V@5A circuits
Built-in CA-IS3020S I2C isolator
Built-in B0505M-2WR3 isolated power module
Onboard relay output status indicator LEDs
Protection circuits on input and output channels
DIN rail mounting / mounting-hole installation

Includes

1 x StamPLC IO
2 x Mounting Bracket

Applications

General-purpose analog signal acquisition
External actuator switch control
Remote control of relay dry contacts
Multi-module isolated IO expansion

Specifications

Specification	Parameter
MCU	STM32G030F6P6
Communication	I2C @ 0x20
I2C Isolator	CA-IS3020S
Isolated Power Module	B0505M-2WR3
Power Conversion	TPAP7343D-33FS4
Voltage / Current Monitor	INA226AIDGSR
Detection Channels	2 analog signal detection channels (compatible with 0 ~ 20mA and 0 ~ 10V analog acquisition)
MOS Switch Output	2 solid-state relay outputs, MOS1 / MOS2, common terminal COM, supporting DC 0 ~ 60V MAX 2.5A switching
Relay Output	1 SRD-5VDC-SL-C mechanical relay, N.C / COM / N.O terminals, supporting AC 250V@5A / DC 28V@5A switching
Address Configuration	4-position DIP switch, configurable I2C address range: 0x20 ~ 0x2F
Control Interface Type	2 x 3P switch output / relay terminals, 1 x 6P input terminal
Installation	DIN rail mounting / mounting hole
Product Size	51.4 x 80.0 x 27.1mm
Product Weight	62.1g
Package Size	84.0 x 56.0 x 29.0mm
Gross Weight	69.2g

Learn

Voltage Sensor Wiring

To measure voltage, connect an active device under test to the IN+ and ISO GND terminals of an input detection channel, as shown below:

Current Sensor Wiring

To measure current, connect an active device under test to the IN+ and IN- terminals of an input detection channel, as shown below:

Relay Switch Wiring

The mechanical relay output provides N.C / COM / N.O terminals, while the solid-state relay output provides MOS1 / MOS2 / COM terminals. The wiring is shown below:

Safety Warning

When connecting 220V AC to the mechanical relay terminals, always follow safe operating procedures to avoid the risk of electric shock.