Description

QEED Isolated Signal Converter

QA-VI Current / Voltage Converter

The QEED QA-VI is a 4-way galvanically isolated voltage or current signal converter with analogue input, programmable analogue output, relay alarm output and RS485 Modbus RTU communication. It is suitable for industrial signal conversion, monitoring, alarm and data acquisition applications.

The module behaves as a Modbus RTU slave device with 1 analogue input, 1 analogue output and 1 digital relay output. It can also perform datalogging through USB On-The-Go using a pen drive, with an integrated real-time clock for timestamped data storage.

Input Voltage or current analogue input

Outputs Analogue, relay and RS485 Modbus

Isolation 4-way galvanic isolation

Datalogging USB pen drive logging with RTC

Overview

QA-VI is used when a field voltage or current signal must be isolated, converted, retransmitted, monitored and made available through Modbus RTU. It can convert analogue signals into programmable voltage or current output while also providing a relay alarm and RS485 communication.

The 17.5mm DIN rail format makes it suitable for control panels, machine panels, energy monitoring systems, process instrumentation, BMS, EMS, SCADA, PLC and industrial IoT applications.

Positioning: 4-way isolated current / voltage signal converter with programmable analogue output, alarm relay, RS485 Modbus and USB datalogging.

Key Features

Voltage or Current Input

Accepts programmable voltage input up to 10Vdc or current input up to 20mA.

Programmable Analogue Output

Provides configurable voltage or current output for retransmission to PLC, BMS or monitoring systems.

Relay Alarm Output

5A SPDT relay contact can be configured as an alarm or threshold output.

RS485 Modbus RTU

Communicates as a Modbus RTU slave for SCADA, EMS, BMS, PLC and gateway integration.

USB Datalogger

Logs data to USB pen drive through USB On-The-Go, with integrated real-time clock.

USB / RS485 Configuration

Configured using free FACILE QA-VI software via USB or RS485, with DIP switch support for address and baud rate.

Input and Output Functions

Function	Specification	Purpose
Voltage Input	Programmable up to 10Vdc, input impedance 100kΩ, 1mV resolution	Signal conversion from voltage transducers and process instruments
Current Input	Programmable up to 20mA, input impedance 20Ω, max resolution 2礎	Signal conversion from 0/4 20mA field instruments
Current Output	0 20mA programmable, max load resistance 600Ω	Retransmission to PLC, BMS, EMS, controller or recorder
Voltage Output	0 10V programmable, minimum load resistance 2kΩ	Retransmission to analogue input systems
Contact Alarm	5A / 230Vac SPDT relay, programmable by FACILE QA-VI	Local alarm, threshold output or control signal
RS485 Modbus	RS485 Modbus RTU slave on terminals or optional base adapter	Digital integration to SCADA, EMS, BMS, PLC and IoT gateways

4-Way Isolation

QA-VI is designed with 4-way galvanic isolation between the input, analogue / digital outputs, RS485 / USB communication and power supply. This helps reduce signal interference and protects systems where different parts of the installation may have different electrical references.

Isolation paths: Input, analogue and digital output, RS485 / USB communication and power supply are galvanically isolated at 1.5kV.

Datalogging Function

QA-VI includes datalogging using a USB On-The-Go port and pen drive memory. The integrated real-time clock enables timestamped data storage. Logged data can be downloaded in Excel-importable files for analysis, reporting or troubleshooting.

USB pen drive data logging
Integrated RTC real-time clock
Configuration of logging parameters through FACILE QA-VI
Storage data export in Excel-importable format
Useful for temporary measurement, commissioning and fault investigation

Technical Specifications

Parameter	Specification
Power Supply	10 to 40Vdc or 20 to 28Vac, 50/60Hz
Input	Voltage up to 10Vdc or current up to 20mA, programmable
Retransmission Output	Isolated analogue output, programmable voltage or impressed current; active or passive output supply
Sensor Power Supply	13Vdc, 30mA max
Absorption	Maximum 20VA
Protection Index	IP20
Accuracy	0.1% F.S.
Resolution	16-bit
Rejection	50 60Hz
Thermal Stability at 25°C	<100ppm / °C
Working Temperature	-15°C to +65°C
Storage Temperature	-40°C to +85°C
Isolation	Input, analogue / digital output, RS485 / USB and power supply isolated at 1.5kV
Humidity	10% to 90%, non-condensing
Altitude	Up to 2000m a.s.l.
Mounting	DIN rail mounting with removable terminals; optional base connection for RS485 bus and supply
Connections	Removable 5.08mm terminals
CE Standards	EN61000-6-4:2006 + A1:2011; EN61000-6-2:2005; EN61010-1:2010
Dimensions	17.5 x 100 x 112mm, terminals excluded
Datalogger	Non-volatile memory, USB On-The-Go logging with pen drive, Excel-importable file output, integrated RTC
Configuration	FACILE QA-VI software via USB or RS485; DIP switch for Modbus address and baud rate

Typical Applications

Signal Isolation

Isolate and retransmit voltage or current signals between instruments and control systems.

PLC / SCADA Integration

Convert analogue field signals into PLC analogue input, Modbus RTU data and alarm output.

BMS and EMS Panels

Use in building and energy management systems for signal conversion and alarm monitoring.

Temporary Logging

Use USB logging for commissioning, troubleshooting, trend capture and site investigations.

Process Monitoring

Convert sensor or transmitter signals into standard output formats for industrial monitoring.

IoTWatt 4.0

Can be integrated through Modbus RTU or compatible input modules into IoTWatt 4.0 systems.

Configuration

QA-VI can be configured using the free FACILE QA-VI software through USB or RS485. The software allows configuration of conversion parameters, span, zero, alarm contact, logging settings and Modbus communication parameters.

Configure voltage or current input range
Configure analogue output range and scaling
Set span and zero
Set relay alarm threshold and behaviour
Configure Modbus address and baud rate
Configure USB datalogging interval and data storage
Use DIP switches for basic Modbus address and baud rate settings

Commissioning note: Confirm input type, output type, scaling, relay alarm logic and Modbus settings before connecting the module into a live control or monitoring system.

System Integration

QA-VI is suitable for converting and isolating field signals before they are connected to PLC, SCADA, BMS, EMS, Modbus gateway, data logger or IoTWatt 4.0. The combination of analogue output, relay output, RS485 Modbus and USB datalogging makes it useful for both permanent and temporary measurement applications.

Use analogue output for direct PLC or controller connection
Use relay output for alarm or threshold indication
Use RS485 Modbus RTU for digital system integration
Use USB datalogging for commissioning and troubleshooting
Use optional base connection for cleaner multi-module panel wiring

QA-VI Supply and Integration

Saturn Pyro supports QEED QA-VI current / voltage converters for signal isolation, analogue retransmission, alarm output, RS485 Modbus integration, USB datalogging, PLC, SCADA, BMS, EMS and IoTWatt 4.0 projects in Malaysia.

Enquire Now

More detail about Saturn Pyro Sdn Bhd