8 Digital Input 8 Digital Output to RS485
Remote I/O
- RS485-based with Modbus RTU protocol for easy integration with PLC, SCADA, and HMI systems.
- 8 optically isolated inputs and 8 digital outputs for reliable operation.
- Supports half-duplex communication with cost-effective two-wire connectivity.
- Offers robust communication, strong isolation, and industrial-grade reliability.
- Ideal for factory automation, building control, and distributed monitoring applications.
Description
The 8DI/8DO RS485 Remote I/O Module is an industrial I/O device designed for reliable digital signal acquisition and control in distributed automation systems. It supports Modbus RTU protocol over RS485 communication, allowing easy integration with most PLCs, SCADA, HMI, and DCS systems.
With 8 optically isolated digital inputs and 8 digital outputs, the module is ideal for monitoring switches, sensors, and controlling actuators or relays in real-time. It supports half-duplex communication with cost-effective two-wire connectivity, making it suitable for legacy industrial systems.
This device provides robust communication, strong electrical isolation, and industrial-grade reliability, making it suitable for factory automation, energy management, building control, and distributed monitoring applications.
Specifications
| Input Power | Unregulated 9 – 24 VDC |
|---|---|
| Power Consumption | Less than 1 W @ 12 VDC |
| Protections | Reverse Polarity, Overvoltage (+/-35 VDC), Short Circuit, Transient Voltage, TVS/ESD |
| Indication | Power (Red), Status (Green) |
| Connector | 5mm pitch screw terminal blocks |
| Enclosure | ABS Enclosure |
| Installation Type | Plug and Play |
| Dimensions | Modular Architecture (145mm x 90mm x 40mm) |
| Warranty | 12 Months from date of installation or 18 Months from date of delivery (whichever is earlier)* |
Data Connectivity
| Connectivity Supported | RS485 |
|---|---|
| Protocol Supported | Modbus RTU |
| Communication Interface | 2 Wire Type |
| Watchdog Timer | System (5 Sec) and Communication |
| Indication | Green for Communication Status |
Digital Input
| Channels | 8 |
|---|---|
| Contact Rating | 24 VDC Sink/source (isolated) Upto 5000 VRMS for 1 minute |
| Standard | Digital Isolator type IEC 60950 |
Digital Output
| Channels | 8 |
|---|---|
| Contact Rating | 5Amp @ 240VAC 5Amp @ 30VDC |
| Type | Form A Type Relay Output |
Environment
| Operating Temperature | 0 to 65° C |
|---|---|
| Storage Temperature | -10 to 70° C |
| Operating Humidity | 5 – 95% RH (non-condensing) |
Mounting
| Built Architecture | Modular |
|---|---|
| Mounting | DIN Rail Mountable, Wall Mountable, Stack Mountable |
| Installation | Plug and Play Device |
Key Features
8 Optically Isolated Digital Inputs
Support source type connections for reliable signal acquisition.
8 Digital Outputs
Available in relay, transistor (open collector) configurations.
Modbus RTU over RS485
Standard industrial protocol for easy integration with control systems.
Two-Wire Half-Duplex Communication
Cost-effective connectivity with simple two-wire installation.
Multi-Drop Network Support
Connect multiple devices on a single RS485 bus network.
Watchdog Timer & Fail-safe Protection
Maintain system stability in communication loss scenarios.
Wide Power Supply Range
9–24VDC supports flexible field installation.
DIN Rail / Wall Mount Design
Compact and rugged industrial housing for versatile installation.
Functional Description
Digital Input Channels can detect switch states, limit sensors, proximity sensors, or dry contact devices.
Digital Output Channels can drive relays, solenoids, indicator lamps, or other external loads.
RS485 Communication enables reliable data transmission over long distances using Modbus RTU protocol.
Watchdog Function automatically resets outputs to safe states if communication is lost.
Configuration Tool provides an intuitive interface for setting Modbus address, I/O mode, and monitoring signal status.
Applications
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