RIO application scene: building HVAC ductwork and ceiling air diffusers, BMS airflow control

REMOTE I/O

RIO Expandable I/O Module Controller

Modbus Remote I/O · Direct Digital Control

Configure your I/O modules Product models

OVERVIEW

Modbus Remote I/O

Flexible I/O module selection, mix and match to your needs

The RIO series is flexibly expandable, offering common Digital and Analog Input/Output interfaces for control and measurement data acquisition. System integrators can fit 1 to 6 expansion I/O modules to match field requirements.

An optional advanced DDC (Direct Digital Control) function adds numeric computation and automated output-point control.

LLD-Modbus32E-01 top view with ModIO modules installed, Modbus remote I/O

FEATURES

RIO Core Features

Modular Plug-In

5 general slots + 1 EXT expansion slot

Mix and match 9 ModIO module types

Easy field service and replacement

Dual Modbus Interfaces

Modbus-TCP over Ethernet

Modbus-RTU over RS-485

Can act as a Modbus master

DDC Function

Real-time monitoring

ICDT graphical control compiler

Data conversion and processing

Multiple Signal Types

Analog and digital signals

Analog Input selectable mA / V / NTC

Higher-precision measurement units

MODELS

Backplane Models

All three backplanes share the same ModIO module ecosystem — choose by interface and I/O scale, then configure modules below.

FLAGSHIP

LLD-Modbus32E-01

Ethernet ×1 ＋ RS-485 ×2

5 general slots + EXT expansion slot, up to 32 I/O points

Supports LLD-DDC direct digital control, runs standalone offline

Details

STANDARD

LLD-ModbusIO-01

RS-485 ×2

Shares slot rules and the full ModIO module lineup with DDC32E

DIP-switch addressing lets multiple units form distributed I/O

Details

COMPACT

LLD-ModbusIO-02

RS-485 ×1

Single-slot compact design — small footprint, low cost

Suited to low-point-count nodes spread across the field

DIP-switch addressing drops straight into an RS-485 loop

Details

CONFIGURATOR

Build Your Own I/O Configuration

Drag a module onto a backplane slot, or select a module then click a highlighted slot to install it

General slots (Module 01–05) accept 4-point modules; Module EXT accepts 12-point high-density modules.

Install limits: general-slot modules up to 5; 12-point modules limited to 1 in the EXT slot.

LLD-Modbus32E-01 top view Modbus Remote I/O baseboard

LLD-ModbusIO-01 top view Modbus Remote I/O baseboard

Module 01

Module 02

Module 03

Module 04

Module 05

Module EXT

General slots (Module 01–05) accept 4-point modules; Module EXT accepts 12-point high-density modules.

Install limits: general-slot modules up to 5; 12-point modules limited to 1 in the EXT slot.

MODULES · ModIO Library

Drag or click

ModIO-DI

4DI

Up to 5

ModIO-DO

4DO

Up to 5

ModIO-Relay

2 Relay

Up to 5

ModIO-AI

4AI

Up to 2

ModIO-AI+

4AI+

Up to 5

ModIO-AO

4AO

Up to 5

ModIO-AIAO

2AI+2AO

Up to 1

ModIO-12DI

12DI

Up to 1

ModIO-12DO

12DO

Up to 1

LIVE · Current Configuration

RELAY

Total I/O points0

MODBUS ADDRESS MAP

No modules installed

MODULES

ModIO Feature Modules

Filter by signal type and mounting slot; installation limits match the configurator rules.

9 modules

4DI

ModIO-DI

4-channel digital input (wet contact / sink mode)

5–24VDC input voltage

2000Vrms isolation + 400W surge protection

Up to 5 · Module 01–05

4DO

ModIO-DO

4-channel digital output (open collector)

5–30VDC@200mA load

2000Vrms isolation + 400W surge protection

Up to 5 · Module 01–05

2 Relay

ModIO-Relay

2-channel relay output (SPDT)

2A@24VDC / 1A@120VAC contact rating

Auto / manual control

Up to 5 · Module 01–05

4AI

ModIO-AI

4-channel analog input, 12-bit resolution

4–20mA / 0–10VDC / NTC signal types

Up to 2 · Module 04／05

4AI+

ModIO-AI+

4-channel analog input, 16-bit high resolution

4–20mA / 0–10VDC / NTC signal types

Up to 5 · Module 01–05

4AO

ModIO-AO

4-channel analog output, 12-bit resolution

4–20mA / 0–10VDC

Up to 5 · Module 01–05

2AI+2AO

ModIO-AIAO

2-in + 2-out combined analog, 12-bit resolution

4–20mA / 0–10VDC

Up to 1 · Module 05

12DI

ModIO-12DI

12-channel high-density digital input (wet contact / sink mode)

5–24VDC input voltage

2000Vrms isolation

Up to 1 · Module EXT

12DO

ModIO-12DO

12-channel high-density digital output (open collector)

5–30VDC@200mA load

2000Vrms isolation

Up to 1 · Module EXT

SOFTWARE · LLD-DDC

Direct Digital Control

Control logic is written directly onto the backplane: author DDC programs in the IcdtDDC development tool, then download them to run standalone on the controller — field control keeps running even when the host system goes offline.

Handle point-data processing and logic control with simple programs

Stored in the product's built-in memory — runs continuously with no external device

Low development effort, with complete examples and tutorials

Connect over Ethernet / RS-485 to update, modify and view remotely

IcdtDDC development tool controller parameter window, online debugging

APPLICATIONS

Applications

APPLICATION · 01 / 03

Building Automation

Aggregate lighting, access, power and environment points over Modbus for centralized building management and energy control.

SPECS

Spec Comparison

Specification	LLD-Modbus32E-01	LLD-ModbusIO-01	LLD-ModbusIO-02
Ethernet	×1 · 10/100Mbps	—	—
RS-485	×2 · 4,800–115,200 bps	×1 · 4,800–115,200 bps	×1 · 4,800–115,200 bps
Modbus protocol	TCP＋RTU	RTU	RTU
General module slots (4-point)	5	5	1
EXT expansion slot (12-point)	✓	✓	—
Max I/O points	32	32	4
DDC function	✓	✓	✓
Power supply	24V AC/DC	24V AC/DC	24V AC/DC
Board Dimensions	200 × 107 × 23 mm	200 × 107 × 23 mm	92 × 87 × 23 mm

RESOURCES

Product Resources

LLD-Modbus32E-01 Datasheet

Product datasheet · PDF · CN/EN

LLD-ModbusIO-01 Datasheet

Product datasheet · PDF · CN/EN

LLD-ModbusIO-02 Datasheet

Product datasheet · PDF · CN/EN

User Manual

Installation, slot rules and Modbus address map · PDF

IcdtDDC Development Tool

DDC program editor with online debugging · ZIP · V1.7.0.2