ESP32 38-Pin WiFi + Bluetooth NodeMCU Development Board
Waveshare 8CH Industrial Digital Input/Output Module, Modbus RTU, DC 7–36V
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The Waveshare 8CH Industrial Digital Input/Output Module is an industrial-grade 8DI/8DO digital I/O module designed for reliable monitoring and control through an RS485 interface using the standard Modbus RTU protocol. It operates from a DC 7–36V power supply and provides 8 digital inputs rated at 5–36V, supporting both passive and active input modes, including NPN and PNP configurations.
The module also features 8 open-drain digital outputs, with each channel supporting up to 500mA maximum output load. For improved reliability in industrial environments, it incorporates bidirectional optocoupler isolation, power isolation, TVS surge protection, a resettable fuse, and protection diode. The configurable Modbus device address ranges from 1–255, allowing multiple modules to be connected on the same RS485 bus.
With a rail-mount design, status indicators, and support for multiple output control modes, this Modbus RTU I/O module is well suited for industrial automation, machine control, PLC expansion, monitoring systems, and other applications requiring isolated digital input and output control.
| Specification | Details |
|---|---|
| Communication Interface | RS485 |
| Baud Rate | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
| Default Communication Format | 9600, N, 8, 1 |
| Modbus Protocol | Standard Modbus RTU Protocol |
| Power Supply | DC 7–36V |
| Digital Input | 8DI, 5–36V, Passive / Active Input (NPN or PNP), Built-in Bi-Directional Optocoupler Isolation |
| Digital Output | 8DO, 5–36V, Open-Drain Output, Output Load: 500mA per Channel (MAX) |
This product comes with a 1-year manufacturer warranty from the date of purchase, covering manufacturing defects only.
The product shows signs of physical damage, mishandling, exposure to water/moisture, fire, natural calamities, unauthorized repairs, improper storage near heat or direct sunlight, or alteration in any way.