AD2RS Remote I/O Controller

AD2RS is an industrial-grade remote I/O controller designed for data acquisition and remote control applications. It combines 4 digital inputs, 2 analog inputs and 4 relay outputs with RS485 communication, making it suitable for energy management, building automation, factory automation and smart monitoring systems.

The controller supports Modbus RTU communication and can be integrated with PLC, SCADA, BMS, EMS, IoT gateways and IoTWatt 4.0 for remote monitoring, status collection, pulse counting, analog signal reading and relay-based control.

Digital Input 4 x DI for dry contact, wet contact, pulse and status

Analog Input 2 x AI for current or voltage signal input

Relay Output 4 x relay output, 5A maximum

Communication RS485 / Modbus RTU

Overview

AD2RS is used when field signals need to be collected and transmitted to a remote monitoring or control system. It can collect digital status, pulse signals and analog values, while also providing relay outputs for control or alarm actions.

Typical use cases include energy monitoring panels, pump and motor status monitoring, utility meter pulse collection, alarm feedback, remote start / stop signalling, BMS integration and IoT-based industrial monitoring.

Positioning: Compact RS485 remote I/O module for industrial data acquisition, remote control, energy monitoring and automation integration.

Key Features

4 Digital Inputs

Supports passive dry contact and active wet contact inputs for pulse counting and status monitoring.

2 Analog Inputs

Accepts current and voltage signals for sensor, transducer and process monitoring applications.

4 Relay Outputs

Relay outputs can be used for alarm, control, interlock or remote switching applications.

RS485 Communication

Integrates with Modbus RTU master systems, PLC, SCADA, BMS, EMS and IoT gateways.

Industrial Temperature

Designed for harsh industrial environments with wide operating temperature range.

Configuration Tool

Device management and configuration tool is provided for setup and commissioning.

Typical Applications

Energy Management

Collect meter pulses, equipment status and sensor values for energy monitoring systems.

Building Management

Integrate field contacts, alarms and control points into BMS or facility monitoring systems.

Factory Automation

Connect machines, counters, switches, sensors and relays to PLC or SCADA systems.

Utility Monitoring

Monitor water, gas, compressed air, flow or other utility signals through DI and AI inputs.

Remote Control

Use relay outputs for alarm signalling, remote actuation and simple control functions.

IoTWatt 4.0 Integration

Use AD2RS with IoT gateways to bring site signals into IoTWatt 4.0 dashboards and analytics.

I/O Functions

I/O Type	Function	Typical Use
4 x Digital Input	Passive dry contact or active wet contact input	Status, alarm, pulse counting, equipment feedback
2 x Analog Input	Current input or voltage input	Sensor, transducer, flow, pressure, level or process signal
4 x Relay Output	Relay output rated up to 5A	Alarm output, remote switching, control and interlock
RS485 Port	Modbus RTU communication	PLC, SCADA, BMS, EMS, IoT gateway and remote monitoring

Technical Parameters

Parameter	Specification
DI Input	Passive: 0V dry contact Active: low level 0~3V, high level 8~24V
AI Input	Current: 4~20mA / 0~20mA Voltage: 0~5V / 0~10V
DO Output	Voltage: 250Vac and 30Vdc Current: 5A Max Response: <30ms
Serial Port	RS485
Power Consumption	< 1.7W and < 70mA @ 24V
Temperature Rating	Operation: -40°C to +85°C Storage: -45°C to +165°C Humidity: 5% to 95% RH
Dimension	L12.2cm x W7.2cm x H3.4cm
Weight	208g

System Integration

AD2RS can be used as a field I/O expansion module where digital and analog signals need to be brought into a central monitoring platform. Through RS485 Modbus RTU, it can communicate with compatible PLC, SCADA, BMS, EMS, data logger, IoT gateway or energy monitoring system.

Connect dry contacts, switches, alarms and equipment status points
Collect pulse outputs from utility meters or energy meters
Read analog values from sensors and transmitters
Control external devices using relay outputs
Integrate field I/O into IoTWatt 4.0 through compatible gateways

AD2RS Supply and Integration

3Wire AD2RS Remote I/O Controller is suitable for industrial data acquisition, automation, building management and energy monitoring projects. Saturn Pyro can support AD2RS supply, configuration, RS485 integration and connection to IoT gateway, EMS, BMS, SCADA and IoTWatt 4.0 systems.

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