Industrial 4-Ch Ethernet I/O Module (4DI/2AI/4DO) & Modbus Gateway

The Valtoris 4-Channel Ethernet I/O Module (4CH-IO-ETH) combines 4 digital inputs, 2 analog inputs and 4 relay outputs into one seamless package and is intended for localized field automation.

Part No. 4CH-IO-ETH
sku : IoT-RIC101
INSTANT QUOTE

Compact Ethernet Data Acquisition

With this 4-Channel Ethernet I/O Module, you can monitor and control industrial equipment remotely, reliably. It supports 4 channels of digital input (DI), 2 channels of analog input (AI) and 4 channels of relay output (DO) at the same time over standard TCP/IP network.

Industrial 4-Channel Ethernet I/O Module Overview

Engineered for the Control Cabinet

Panel real estate is expensive. This I/O module features an ultra-compact footprint with a native 35mm DIN-rail buckle mechanism. You can slide it effortlessly alongside existing PLCs and contactors without custom mounting brackets.

Native 35mm DIN Rail Mounting
Module Terminal block Interfaces

Advanced Modbus Edge Processing & P2P Control

The 4CH series provides intelligent edge capabilities, unlike basic I/O blocks. It supports dual protocols (Modbus TCP/RTU) and Peer-to-Peer (P2P) control. Two modules can be coupled over a LAN so that a physical switch on Module A can instantly trigger a relay on Module B without the need for a central server.

Advanced Modbus Edge Processing and Protocol Support
Rich indicator light for status monitoring

Flexible Networking: DHCP & DNS Support

Deploying dozens of nodes shouldn't require manual IP address bookkeeping. The built-in DHCP client automatically pulls network configurations from your router, while DNS resolution allows you to send telemetry data directly to cloud domain names instead of static IP addresses.

Flexible Networking with DHCP and DNS Support settings

Stackable Design & Dimensions

Need more than 4 channels? The module's flush chassis design enables stackable, side-by-side mounting on DIN rails, allowing you to scale your acquisition nodes linearly as project requirements grow.

Stackable Side-by-Side DIN Rail Installation
Outline Mechanical Dimensions

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Remote I/O Controller Selection Guide

Compare the Valtoris 4CH series against our larger capacity and wireless telemetry modules to find the exact fit for your control architecture.

ModelI/O DensityNetwork UplinkPower InputDimensions (mm)

4CH-IO-RS232/485

2 AI / 4 DI / 4 DOSerial (RS232/485)Terminal (DC 9~24V)121 × 72 × 34

4CH-IO-ETH (This Model)

2 AI / 4 DI / 4 DOEthernet (TCP/IP)Terminal (DC 9~24V)121 × 72 × 34

8CH-IO-ETH

8 AI / 8 DI / 8 DOEthernet (TCP/IP)Terminal + DC Jack197 × 92 × 25

8CH-IO-WE

8 AI / 8 DI / 8 DOWi-Fi (Wireless)Terminal (DC 9~24V)197 × 92 × 25

8CH-IO-LTE

8 AI / 8 DI / 8 DO4G LTE (Cellular)Terminal + DC Jack197 × 92 × 25

Hardware & Interfaces
Network Interface1x RJ45 (Ethernet 10/100M)
Power Input9~24V DC (Terminal Block)
Power Consumption< 1.8W, < 75mA @ 24V DC
I/O Configuration
Digital Inputs (DI)4 Channels (Passive switch or Active level 9V/24V)
Digital Outputs (DO)4 Channels (Relay Output: 5A@250VAC / 30VDC)
Analog Inputs (AI)2 Channels
AI Sub-model Options4~20mA / 0~20mA / 0~5V / 0~10V / Resistance 0~10kΩ
Software & Performance
ProtocolsModbus RTU / Modbus TCP
Response Time< 30ms
Mechanical & Environment
Dimensions12.2 cm × 7.2 cm × 3.4 cm (L x W x H)
Operating Temp.-40°C ~ +85°C
4CH-IO-ETH Key Capabilities
✓ Dual Protocol Support: Access local sensor data via traditional Modbus RTU, or stream directly to your SCADA via Modbus TCP over the Ethernet port.
✓ Active Reporting (Push Mode): No more polling congestion on the network. Configure the module to forward DI status changes or AI limit violations directly to your host server.
✓ Peer-to-Peer (P2P) Control: Connect two modules of the back to back over a LAN. A physical switch on Module A will immediately actuate the relay output on Module B without a PLC in the middle.
✓ Fail-Safe State Retention: Configure default power-on parameters. If network communication is lost, Digital Outputs (DO) automatically revert to your pre-defined safe state.
✓ Dynamic Networking (DHCP/DNS): Dynamically pull IPs from network routers . Avoid address conflicts . Speak directly to cloud platforms using Domain Names .

* Ensure you have administrative privileges on your Windows machine before running the VirCom setup utility.

Frequently Asked Questions

How does the Peer-to-Peer (P2P) control work between two modules?
By assigning one module as a Client and the other as a Server via the VirCom software, a DI change (like a switch being flipped) on DevA automatically sends a Modbus command to actuate the corresponding DO relay on DevB over the Ethernet network.
Can the built-in relay outputs (DO) directly drive heavy field motors?
No. The internal relays are rated for 5A@250VAC. They are designed for control-level switching. To drive large inductive loads like motors, you must wire these relay outputs to external, appropriately sized AC contactors or SSRs.
Can I change the Analog Input (AI) type from 4-20mA to 0-10V via software?
No. The AI input format depends on the specific hardware sub-model you order (e.g., 4CH-IO-ETH-A for current, 4CH-IO-ETH-10V for voltage). The sampling circuitry is physically different to ensure accuracy.
Does the module retain its output state if the network disconnects?
This is up to you. The “DO hold time” and “DO hold bit sel” parameters allow you to specify if digital outputs hold their state or go to a safe mode if no Modbus TCP commands are received within a specified time frame.
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