Real-time Energy Insights Powered by Smart Monitoring and Edge Control
OVERVIEW
What is groov RIO EMU? Smart, Secure, and Scalable Edge I/O
Why groov EMU?
Conventional Power Metres
Tracking energy usage helps identify abnormal patterns that signal equipment issues early.
Energy data enables proactive servicing before failures occur, reducing unplanned downtime.
Monitoring energy consumption reveals inefficiencies that can be corrected to lower expenses.
How Is groov RIO EMU Different from Other Power Metres
Built-in cybersecurity features protect data and network integrity.
Seamless integration with modern systems via MQTT, REST, and secure APIs.
Real-time data analysis at the source eliminates the need for external processing hardware.
Benifits
Benefits of groov RIO EMU
Revolutionising Energy Monitoring & Insights
Monitor, manage, and optimise energy at the edge — without a PLC
Gain real-time visibility into your electrical systems with Opto 22’s groov RIO EMU, a powerful energy monitoring unit that captures over 60 detailed electrical parameters in 3-phase systems. With built-in support for open protocols, edge processing tools like Node-RED and Python, and no additional controller required, groov RIO EMU makes deploying energy intelligence faster, more flexible, and secure.
Turn electrical data into actionable insights — right at the source
groov RIO EMU enables you to capture power usage, identify inefficiencies, and reduce downtime by analysing detailed electrical parameters directly at the edge. With onboard analytics, protocol-ready integration, and flexible CT compatibility, you can make smarter decisions without waiting for upstream processing.
Simplify power monitoring in retrofit or greenfield installations
With universal input support and compact design, groov RIO EMU is perfect for both retrofit energy audits and new industrial builds. It integrates seamlessly into your existing network using MQTT, Modbus, OPC UA, or REST — no PLC or software licences required.
Built-in security, scalability, and protocol freedom
From industrial plants to remote assets, groov RIO EMU delivers accurate energy data with enterprise-grade security and dual Ethernet ports for network segmentation. Publish to cloud platforms, stream to SCADA, or trigger logic flows locally — all in one device, engineered to scale with your energy management goals.
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From industrial plants to remote assets, groov RIO EMU delivers accurate energy data with enterprise-grade security and dual Ethernet ports for network segmentation. Publish to cloud platforms, stream to SCADA, or trigger logic flows locally — all in one device, engineered to scale with your energy management goals.
Features
Features of Groov RIO EMU
Accurately measures voltage, current, power, energy, and power factor across 3-phase systems, using 0.5% accuracy class metering.
Works with a wide range of current transformers (CTs), including 333 mV, 1 V, and 5 A types — making it ideal for retrofit or new installations.
Real-time access to over 60 electrical parameters, including watts, VA, VAR, frequency, and harmonics — perfect for energy auditing and predictive maintenance.
Supports MQTT Sparkplug B, OPC UA, Modbus/TCP, and REST APIs — no gateway needed. Seamlessly sends data to cloud platforms or SCADA systems.
Run automation logic with Node-RED, Python 3, and optional PAC Control Runtime directly on the device — no separate controller required.
Dual Ethernet ports, integrated firewall, user management, VPN support, and a wide temperature range (-20 to 70 °C) for rugged reliability in demanding environments.
Case Studies
How a Heat Treatment Manufacturer Reduced Energy Waste Saved
RESOURCES
Resources for groov RIO EMU
groov EPIC, groov RIO, MQTT
Guide to Networking groov Products
Discover how to network groov EPIC and RIO — read
groov RIO, groov RIO EMU, groov RIO M1 & M2, groov RIO Security, Opto 22
groov RIO Data Sheet
This data sheet outlines technical specifications, I/O capabilities, supported protocols,
groov RIO, groov RIO EMU, Opto 22
groov RIO EMU Brochure
Get real-time insight into your energy use with groov RIO
groov EPIC, groov RIO, Opto 22, Reports
I/O for the IIoT
See how Edge I/O creates a simpler way to meet
groov EPIC, groov EPIC Security, groov RIO, groov RIO EMU, groov RIO Security, Opto 22
groov EPIC and groov RIO Cybersecurity Design and Best Practices
groov EPIC and groov RIO are built from the ground
groov RIO, groov RIO EMU, Opto 22
groov RIO Energy Monitoring Unit Data Sheet
Technical specifications for the groov RIO EMU, including input compatibility,
COMPARE
Compare the groov RIO
RIO M1
An industrial controller with real-time control, edge computing, and secure connectivity.
RIO M2
A high-performance controller with faster processing and expanded connectivity.
RIO EMU
A compact energy monitoring unit with real-time data logging.
2GB memory for control, connectivity, and data handling.
4GB memory for enhanced performance, ideal for more demanding applications, including Ignition Edge 8.
4GB memory for enhanced performance, ideal for more demanding applications, including Ignition Edge 8.
Standard memory for control, connectivity, and data handling.
Increased memory for enhanced performance, ideal for more demanding applications, including Ignition Edge 8.
Increased memory for enhanced performance, ideal for more demanding applications, including Ignition Edge 8.
Supports PAC Control, CODESYS, Node-RED, and groov Manage; optional Ignition Edge.
Supports PAC Control, CODESYS, Node-RED, and groov Manage; optional Ignition Edge.
Supports PAC Control, CODESYS, Node-RED, and groov Manage; optional Ignition Edge.
Dual Ethernet interfaces, built-in firewall, user authentication, no default passwords, MQTT/Sparkplug, and OPC UA support.
Dual Ethernet interfaces, built-in firewall, user authentication, no default passwords, MQTT/Sparkplug, and OPC UA support.
Dual Ethernet interfaces, built-in firewall, user authentication, no default passwords, MQTT/Sparkplug, and OPC UA support.
FAQ
Frequently Asked Questions for groov RIO EMU
What is the groov RIO EMU energy monitoring unit?
The groov RIO EMU (GRV-R7-I1VAPM-3) by Opto 22 is a compact, industrial-grade energy monitoring device designed for 3-phase power systems. It captures over 60 real-time electrical parameters to help businesses monitor and optimise energy usage without the need for a traditional PLC or gateway.
Does groov RIO EMU require a PLC or external controller?
groov RIO EMU enables you to capture power usage, identify inefficiencies, and reduce downtime by analysing detailed electrical parameters directly at the edge. With onboard analytics, protocol-ready integration, and flexible CT compatibility, you can make smarter decisions without waiting for upstream processing.
Which current transformers (CTs) are compatible with groov RIO EMU?
groov RIO EMU supports 333 mV, 1 V, and 5 A CTs, making it flexible for both new installations and retrofit projects. This wide compatibility allows you to connect to existing infrastructure with ease.
What types of data does groov RIO EMU collect?
groov RIO EMU captures more than 60 real-time electrical parameters, including:
•Voltage (line and phase)
•Current
•Real, apparent, and reactive power
•Power factor
•Harmonics
•Frequency
•Energy consumption (kWh)
This comprehensive data supports smarter energy management and predictive maintenance strategies.
What protocols does groov RIO EMU support for integration?
groov RIO EMU is built for IIoT and industrial integration, supporting:
• MQTT Sparkplug B
• Modbus/TCP
• OPC UA
• RESTful APIs
These allow seamless connectivity to SCADA systems, cloud platforms, and enterprise databases.
Can groov RIO EMU run local logic or automation workflows?
Yes. The device supports local processing via:
•Node-RED for flow-based programming
•Python 3 for advanced scripting
•PAC Control Runtime (on the M2 model) for IEC 61131-3 compatible control logic
This enables you to automate actions based on real-time energy data at the edge.
What types of data does groov RIO EMU collect?
groov RIO EMU captures more than 60 real-time electrical parameters, including:
•Voltage (line and phase)
•Current
•Real, apparent, and reactive power
•Power factor
•Harmonics
•Frequency
•Energy consumption (kWh)
This comprehensive data supports smarter energy management and predictive maintenance strategies.
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