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R4PIN08-PIN-4DI-4DO 8-Channel RS485 Modbus RTU Remote I/O Module | 4 Digital Inputs & 4 Digital Outputs | 5V/12V/24V TTL
The R4PIN08_PIN_4DI-4DO is a compact and versatile 8-channel RS485 Remote I/O Module designed for industrial automation, PLC control, and distributed I/O applications. Configured with 4 Digital Inputs (DI) and 4 Digital Outputs (DO), it communicates using the industry-standard Modbus RTU protocol over an RS485 interface, enabling reliable long-distance data transmission and seamless integration with PLCs, HMIs, SCADA systems, and industrial controllers.
Supporting 5V, 12V, and 24V TTL operation, the module offers flexible connectivity for a wide range of sensors, switches, relays, and actuators. It features configurable input/output logic, multiple baud rate options, and supports up to 247 Modbus slave devices on a single RS485 network. Its compact 2.54mm pin-header design makes it ideal for embedded systems, custom automation panels, and IoT gateways where space is limited. The module also supports selectable I/O modes via onboard jumpers, allowing it to be adapted to various digital control requirements.
Features
- 4 Digital Inputs (DI) and 4 Digital Outputs (DO)
- RS485 communication with Modbus RTU protocol
- Supports 5V, 12V, and 24V TTL applications
- Compatible with PLCs, HMIs, SCADA, and industrial PCs
- Configurable NPN/PNP input and output logic
- Supports up to 247 devices on a single RS485 bus
- Adjustable baud rates from 1200 to 115200 bps
- Compact 2.54mm pin-header interface for easy wiring
- Low power consumption and reliable industrial performance
- Ideal for remote monitoring, automation, and distributed I/O expansion
Specifications
- Model: R4PIN08_PIN_4DI-4DO
- I/O Configuration: 4 Digital Inputs (DI) + 4 Digital Outputs (DO)
- Communication Interface: RS485
- Communication Protocol: Modbus RTU
- Supported Modbus Function Codes: Read: 01, 02, 03 • Write: 05, 06, 15, 16
- Supply Voltage: DC 6–25V (reverse polarity protected) or DC 4–5V (TTL supply)
- Compatible Logic Levels: 3.3V / 5V TTL Input, 5V TTL Output
- Input Channels: 4 Digital Inputs
- Output Channels: 4 Digital Outputs
- Input Type: Configurable Low-Level (Default) or High-Level Input
- Output Type: Configurable Low-Level (Default) or High-Level Output
- NPN/PNP Support: Software configurable via Modbus registers
- Working Current: 6–13 mA
- Baud Rate: 1200, 2400, 4800, 9600 (Default), 19200, 38400, 57600, 115200 bps
- Serial Format: None / Odd / Even Parity
- Maximum Devices on RS485 Bus: Up to 247 Modbus slave devices
- I/O Status Reporting: Query mode and Automatic Reporting
- Interface: 2.54 mm Pin Header
- Supported I/O Modes: 8DI, 8DO, 4DI-4DO, 2DI-6DO, 6DI-2DO (Jumper Selectable)
- Dimensions: 30 × 25.4 × 2 mm
- Weight: Approx. 3 g
- Operating Applications: PLCs, SCADA, HMIs, Industrial Automation, Remote Monitoring, Embedded Control Systems
Package Includes
- 1x R4PIN08_PIN_4DI-4DO 8-Channel RS485 Modbus RTU Remote I/O Module | 4 Digital Inputs & 4 Digital Outputs | 5V/12V/24V TTL
Warranty Terms :
Branded products (Waveshare/ Raspberry Pi/ Radxa/ DWIN etc) are as per brand warranty terms. Generic products are eligible for replacement within 7 days of delivery based on following conditions.
Products are eligible for a replacement if there is physical damage during transit or a clear manufacturing defect. Any claim for damage/ wrong items/ replacement must be made within 48 hours of successful delivery of the product. Requests for refund of amount or exchange of product(s) will be reviewed on a case by case basis and HUBTRONICS carries final rights to take a final decision on refund, store credit or exchange.
What to take care of ?
Most of our products are technical in nature and require trained personnel to handle them. Any kind of mishandling can result in damage or malfunctioning of the product, it is not possible for us to provide a replacement or refund if the product is damaged due to technical or physical mishandling.
Who pays the return shipping cost?
Free of cost return pickup from delivery address is eligible for products categorized as manufacturing defect/ Damage in transit/ Wrong items delivered. We do not support return pickup for any B2B order or offline orders not placed on website. Buyer need to arrange return shipping for B2B orders.
What voids warranty?
Please note that replacement/ return or refund is not possible if the product is not compatible with your system/application. Please check all the technical details/ dimensions etc. before ordering and contact us for any kind of clarifications.
If product is soldered/ programmed at any point or physically altered in any way, it is not eligible for return/ replacement. If the item requires soldering for testing, please ensure that you use suitable clips or jig to test it without soldering. Any kind of soldering job makes the product ineligible for return or replacement.
Following items are not eligible for return under any circumstances
- Device Programmers / Dongles
- Soldering Consumables (Wire, Flux etc)