Industrial 8-Channel 4G LTE I/O Controller | MQTT Modbus Gateway

Engineered for off-grid telemetry, this cellular 4G LTE I/O edge node consolidates 8 channels of analog and digital signals alongside RS485 serial data, providing robust Modbus and MQTT integration for remote infrastructure management .

Part No. 8CH-IO-LTE
sku : IoT-RIC104
INSTANT QUOTE

Primary function

Supports reading digital input by sending Modbus TCP/RTU protocol commands via RS485/4G for digital output control

ModBus Communication Protocol

Support ModBus TCP or ModBus RTU, Can be selected manually

Controlled via RS485 and 4G

Rich Indicator light

Displays the DI/DO status, network status, and data flow status

Supports DI control DO

A pair of 8CH-IO-LTE devices can be connected via 4G communication to control each other, making them easy to use.

Product Show

Outline dimensions

Remote I/O Controller Selection Guide

ModelREMOTE I/O CONTROLLE TYPECommunication methodPower Supply Voltage RangeDimensions
(L × W × H)

4CH-IO-RS232/485

2 AI 4 DI 4 DO Remote I/O ControllerRS232/485Screw terminalDC 9~24V121*72*34mm

4CH-IO-ETH

2 AI 4 DI 4 DO Remote I/O ControllerEthernetScrew terminalDC 9~24V121*72*34mm

8CH-IO-ETH

8 AI 8 DI 8 DO Remote I/O ControllerEthernetScrew terminal + DC 5.5 power portDC 9~24V197*92*25mm

8CH-IO-WE

8 AI 8 DI 8 DO Remote I/O ControllerWIFIScrew terminalDC 9~24V197*92*25mm

8CH-IO-LTE

8 AI 8 DI 8 DO Remote I/O Controller4GScrew terminal + DC 5.5 power portDC 9~24V197*92*25mm

 

External interface

Size:

L x W x H =9.2cm×19.7cm×2.5cm

Software

Network protocol

Modbus TCP/ MQTT/JSON/ HTTP

RS485 protocol

Modbus RTU

Serial port parameter

 

Baud Rate

115200bps

Parity bit

Parity checking

Data bit

7, 8 bits

Stop bit

1 bit

AI Input Format

Current: 4~20mA, 0~20mA”, Voltage: 0~5V, 0~10V, “Resistor: 0~10K, temperature/humidity sensor, 12-bit accuracy

Power Consumption

4G dial status: 60mA@12V

Communication

Transmission rate

LTE：Max 10Mbps（down）/Max 5 Mbps（up）

GPRS：85.6Kbps（down）/Max85.6Kbps（up）

Support band

B1/B3/B5/B8@FDD LTE

B34/B38/B39/B40/B41@TDD-LTE

B3/B8@GSM

SIM

Voltage: 3V, 1.8V; Size: large card (small card can be purchased to use)

Antenna interface

50Ω/SMA glue stick antenna or suction cup antenna is optional

Environment

Operating temperature

-40~85℃

Storage temperature

-45~165℃

Humidity range

5~95% relative

The 8CH-IO-LTE is a rugged edge node for consolidation of analog and digital signals over RS485 and cellular networks. To prevent remote lockups, we added a dedicated hardware watchdog circuit that guarantees the CAT1 cellular module is always connected and always on. It converts Modbus TCP to RTU protocol seamlessly and allows monitoring of 8x DI, 8x AI and controlling of 8x relay outputs simultaneously without any extra PLC hardware.

Q1: What happens to the relay outputs if the 4G LTE connection drops?

A. Our gateways have configurable Failsafe States. You can set the relay (DO) to remember its last position or automatically go to a predefined safe state (like shutting down a pump) when the cellular network is lost. Meanwhile, the built-in hardware watchdog will continue to attempt to reconnect in the background until the link is restored.

Q2: Can the gateway execute local control logic without relying on cloud commands?

A: Yes. The 8CH-IO-LTE is not just a passive pass-through node; it supports Local Linkage Rules (Edge Logic). You can set up conditions directly on the device—for example, “If AI channel 1 detects high water level, instantly close DO relay 1 to start the pump.” This edge-level control prevents potential disasters caused by network latency.

Q3: Can I customize the JSON payload format when publishing sensor data to an MQTT broker?

A: Definitely. We know that different IoT platforms (AWS IoT, Azure, ThingsBoard) have strict payload requirements. You can completely customize the MQTT topics and the JSON data structure in our configuration interface. If you have legacy SCADA software that does not support MQTT, you can still integrate it using our [Industrial Serial Device Servers & Virtual COM software].

Q4: Can this cellular I/O controller completely replace a local PLC?

A: It depends on your application. For distributed pumping stations, weather monitoring, or remote telemetry where you only need simple threshold-based switching and data logging, it can easily replace a micro-PLC, saving you hardware and programming costs. However, for high-speed, millisecond-level motion control, you should keep the PLC and use this gateway simply as an [Industrial Cellular Modem (DTU)] to pass the PLC’s RS485 data to the cloud.

📥Documents

[User Manual] Valtoris-8CH-IO-LTE User Manual

⚙️Utilities

[Setup Software] VirCom7.22

 
SHOP   https://shop.valtoris.com/shop/8-channel-4g-lte-io-controller-module/
🛠️ Engineering Guides & Pinouts

Practical wiring diagrams, protocol comparisons, and troubleshooting steps for field engineers.

🏗️ Hardware Selection & Architecture

Detailed buying guides and network topologies for scaling your remote SCADA deployments.

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