Industrial 8-Channel Ethernet Remote I/O Module & RS485 Gateway

The Valtoris 8-Channel Ethernet Remote I/O Module (8CH-IO-ETH) replaces expensive micro-PLCs. It seamlessly consolidates 8DI, 8DO, and 8AI with an integrated RS485 serial gateway. 

Part No. 8CH-IO-ETH
sku : IoT-RIC102
INSTANT QUOTE
Remote IO Controller
Remote IO Controller

Hybrid Edge Data Acquisition

-40°C ~ +85°C
Extreme Temp Range
DC 9~24V
Wide Voltage Input
30mA @ 12V
Ultra-Low Power

This 8-Channel network I/O module replaces costly micro-PLCs. It directly converts 8DI, 8AI and 8DO signals into standard Modbus TCP or MQTT payloads, immediately reducing cabinet complexity and hardware costs.

8-Channel Ethernet Remote I/O Module Overview
Digitize Edge Sensors Without a Local PLC

Wireless Extension & Cellular Gateway Companion

Plug this I/O module into any industrial wireless router's LAN port. It instantly transmits isolated field data (like tank levels or pump status) back to the central server via secure Wi-Fi Mesh or 4G LTE.

The Perfect Companion for Cellular & Mesh Gateways

Industrial Protocol Flexibility (Modbus & MQTT)

Native support for Modbus TCP, Modbus RTU, MQTT+JSON and HTTP. The RS485 port is built-in and provides a transparent gateway to external serial devices, allowing fast SCADA integration, without complex ladder logic programming.

Industrial Protocol Flexibility with Modbus and MQTT
Supports 8-channel DI/DO/AI and Protocols

Visual Configuration Without Ladder Logic

Forget complex PLC programming. Use our free VirCOM utility to easily map I/O parameters, define AI input ranges, and configure Modbus/MQTT JSON payloads through a clear, graphical interface.


VirCOM Software Visual Configuration Interface

Peer-to-Peer (P2P) I/O Tunneling

Create a P2P tunnel by connecting two modules on an Ethernet network. A Digital Input (DI) on Device A immediately closes the corresponding Digital Output (DO) relay on Device B, like a virtual control cable.

Peer-to-Peer (P2P) I/O Tunneling for Cable Replacement

Comprehensive Diagnostic Indicators

Front panel LEDs provide real-time status for DI/DO logic, Ethernet linkage, and RS485 transmission, drastically reducing on-site troubleshooting time.

LED Diagnostic Indicators
IndicatorNameGreenBlue
PWRPowerSystem is powered on-
ACT3IO Comm485-IO Interface data input485-IO interface data returned
ACT2NetworkNetwork port is receiving dataNetwork port is sending data
ACT1SerialData output on RS485 portData input on RS485 port
LINKTCP LinkEthernet cable connectedTCP connection established
DI1～DI8DI statusInput is low (closed circuit)-
DO1～DO8DO statusRelay is actively closed-

Product Details & Dimensions

Product Hardware View Details
Outline Dimensions Schematic

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Remote I/O Controller Selection Guide

4CH-IO

4CH-IO-RS232/485

RS232/485
2 AI | 4 DI | 4 DO
DC 9~24V

View Details

4CH-IO

4CH-IO-ETH

Ethernet
2 AI | 4 DI | 4 DO
DC 9~24V

View Details

★ CURRENT MODEL

8CH-IO

8CH-IO-ETH

Ethernet
8 AI | 8 DI | 8 DO
Terminal + DC Port

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8CH-IO

8CH-IO-WF

Wi-Fi Wireless
8 AI | 8 DI | 8 DO
DC 9~24V

View Details

8CH-IO

8CH-IO-LTE

4G LTE Cellular
8 AI | 8 DI | 8 DO
Terminal + DC Port

View Details

Hardware & Interfaces
Network Interface1x RJ45 (Ethernet 10/100M)
Serial Port1x RS485 (Terminal Block, 1200~921600 bps)
Power InputDC 9~24V (Terminal Block or DC Jack)
I/O Configuration
Digital Inputs (DI)8 Channels (Passive Dry Contact or Active Level 9V/24V)
Digital Outputs (DO)8 Channels (Relay Output: 5A@250VAC / 30VDC)
Analog Inputs (AI)8 Channels (12-bit ADC accuracy)
AI Sub-modelsCurrent (4~20mA), Voltage (0~5V, 0~10V), or Resistance
Software & Environment
ProtocolsModbus TCP / Modbus RTU / MQTT / JSON / HTTP
Power Consumption30mA @12V (Stable) / 300mA @12V (All relays closed)
Dimensions19.7cm × 9.2cm × 2.5cm
Operating Temp.-40°C ~ +85°C
⚙️ Core Hybrid Acquisition Capabilities
✓ All-in-One Data Collection: Simultaneously captures 8 Digital Inputs (DI), executes 8 Digital Outputs (DO), reads 8 Analog Inputs (AI), and polls an independent external RS485 bus.
✓ Unified Modbus/MQTT Up-link: Converts raw I/O terminal states and daisy-chained RS485 slave data to standard Modbus TCP, MQTT or JSON payloads. Push directly to your SCADA central or public cloud dashboard.
✓ Streamlined Configuration (No Ladder Logic): No need for complicated PLC programming. Using our free intuitive VirCOM utility, you can easily define AI input ranges and map I/O parameters over the network.
✓ Ultra-Low Power Consumption: 30mA (@12V) in stable running condition. Great for solar or off grid remote telemetry enclosures.

Frequently Asked Questions

What happens to the Digital Outputs (DO) if the Ethernet connection to the SCADA/PLC is accidentally lost?
The 8CH-IO-ETH features a configurable network watchdog and “Safe State” mechanism. In case the module detects a loss of Modbus TCP communication for a user-defined amount of time (DO hold time), it will automatically force all DO relays into a pre-configured safe state (e.g., all disconnected). This prevents runaway valves or motors during an outage.
Can the DO relays directly drive high-power AC motors or large inductive solenoid valves?
Not directly. The internal relays are designed for control-level switching, supporting up to 5A at 30VDC or 250VAC. AC motors driving high inductance loads will cause inrush current and back-EMF that can damage the module. You must wire the DO to trip an external heavy-duty industrial contactor or a Solid State Relay (SSR) to control the main power load.
Does the RS485 port only serve to configure the module, or can it collect data from external sensors?
The built-in RS485 port acts as an active Modbus RTU gateway. It can be daisy-chained to third-party RS485 devices like power meters or VFDs. The 8CH-IO-ETH polls them and maps their data into its own unified Modbus TCP or JSON payload.
How accurate are the Analog Inputs (AI), and can they be recalibrated?
The AI module provides 12-bit ADC accuracy. Every IO controller is professionally calibrated at the factory. However, if fine-tuning is required, users can use the “AI Calibration” function within the VirCOM utility to connect a standard voltage/current source and recalibrate the system.
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