groov EMU

The GRV-R7-I1VAPM-3 is a groov RIO energy monitoring unit (EMU) designed as an intelligent, distributed power and energy monitoring module. With built-in web-based configuration, commissioning, flow logic software, and the ability to run control programs written in IEC 61131-3 compliant languages, the groov RIO EMU also offers support for multiple OT and IT protocols. All these capabilities give the groov RIO EMU the flexibility to fit into IIoT projects (especially those that require energy data acquisition or communications) or traditional energy management control systems, or to act as a stand-alone energy management control unit.. Learn more about monitoring power and energy with groov products.

The groov RIO EMU simultaneously measures volts AC RMS and amps AC RMS on Category III wye (up to 400 VAC) or delta (up to 600 VAC) circuits. It can monitor three-phase AC current using 0.333 V, 1 V, or 5 A current transformers (CT). (Opto 22 offers a range of split-core current transformers suitable for the groov RIO EMU.) Each phase can be configured to ignore signals below a specified threshold in power measurement and energy accumulation to help you tune signal accuracy.

From the two measured field inputs, the module automatically calculates a total of 64 data values, including voltage and current; true, reactive and apparent power; power factor, frequency, net energy, and other values, as well as accumulated energy values for all phases. 

You can use groov RIO EMUs in several ways:

• As an edge energy monitoring unit, communicating data between loads and data destinations. You can:
  • Push data directly to on-premises or cloud apps, databases, or other software, typically using the included Node-RED
  • Publish data to an MQTT broker
  • Respond to Modbus/TCP requests for data
  • Configure with browser-based groov Manage software
  • Manage local user accounts and permissions, or from a central location through an LDAP server
• As a traditional energy monitoring unit (on its own or as part of a larger system), configuring channels through your control program:
  • With a groov EPIC processor running a PAC Control strategy; add a groov RIO EMU as an I/O unit
  • With CODESYS applications:
    • As part of a larger energy monitoring system: download and install the Opto 22 CODESYS Library Package to the CODESYS Development System, then add a groov RIO EMU as an Ethernet device.
    • As a stand-alone energy monitoring and control unit: enable the on-board CODESYS runtime engine (requires purchase of GROOV-LIC-CRE-RIO), download and install the Opto 22 Library Package for CODESYS, build your control program, and run it on the groov RIO EMU.
  • With a custom control program through either groov RIO's OptoMMP memory map, its REST API, or through secure shell access (requires free GROOV-LIC-SHELL license)

The GRV-R7-I1VAPM-3 has a communications processor with two switched Gigabit Ethernet interfaces, one capable of Power over Ethernet (802.3af PoE Class 0) connections, supplying power to the groov RIO. It also has:

• Supply terminals to connect to a 10-32 V DC power supply.
• A USB host port, which can be used to connect additional devices like a Wi-Fi adapter, a USB memory stick, or a USB-to-serial adapter (none included).
• Status LEDs to display the status of power, network, and electrical activity.
• One 13-pin removable field I/O termination connector with spring clamp wire retention.