Eaton EMR-3MP0-2A9BB1-1 Motor Relay - Modbus RTU RS-485
Part Number: EMR-3MP0-2A9BB1-1
Quick Summary
The Eaton motor relay EMR-3MP0-2A9BB1-1 enables reliable motor control for industrial drives. Many teams struggle with integrating protection, communication, and diagnostics in a single, scalable device. Compliance details should be confirmed with the manufacturer; typical industrial relays in this family support CE marking and IP ratings, though exact certifications vary by model. This solution combines protection, measurement, and Modbus RTU or DNP3 RTU communication over RS-485 to streamline motor protection workflows, while offering easy field installation and compatibility with MP-3000 settings. In practice, you gain reduced wiring, faster deployments, and improved visibility into motor health for maintenance planning.
Product Information
Extended Description
EMR-3MP0-2A9BB1-1 Eaton: Eaton motor relay, EMR-3MP0-2, current only motor relay, 4I, 4O, 1AO , IRIG-B, 5A PH and GND, Modbus RTU or DNP3 RTU over RS485, Conf. coat, Fixed CT Term, Projection mount, with MP Term Conv
Product Name
Eaton motor relay
Catalog Number
EMR-3MP0-2A9BB1-1
UPC
786689239398
Product Length/Depth
8.06 in
Product Height
8.62 in
Product Width
6.82 in
Product Weight
5.82 lb
Compliances
Contact Manufacturer
Application
Motor
Type
Motor relay
Analog inputs
0
Phase current
5A
Analog outputs
1
Digital inputs
4
Digital outputs
4
I/O options
IRIG-B URTD Interface
Modbus / DNP3 RTU
over RS-485
Sensing inputs
Current Protection and Metering
Zone selective interlocking
0
Frequency rating
50/60 Hz
Mounting method
Projection
PowerPort-E 4.71
PowerPort-E 4.71
EMR-3MP0 Modbus® register maps
EMR-3MP0 Modbus® register maps
EMR-3MP0 technical data
MP-3000 to EMR-3MP0 Settings Sheet
MP-3000 to EMR-3MP0 Settings Sheet
EMR-3MP0 motor protection relay instruction book
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Interfacing with an Eaton E-Series Relay, Step 6: Front Panel Navigation
Eaton Specification Sheet - EMR-3MP0-2A9BB1-1
Feature: 4 digital inputs and 4 digital outputs with 1 analog output. Business Impact: Enables complex control logic and real-time monitoring with minimal panel wiring, reducing installation time and potential wiring errors. Application: Ideal for motor protection and control in conveyors or packaging lines. Feature: Modbus RTU or DNP3 RTU over RS-485 with IRIG-B interface. Business Impact: Seamless integration with SCADA and time-synchronised metering, improving commissioning and remote diagnostics. Application: Industrial automation ecosystems requiring reliable remote supervision. Feature: 5A phase current rating and current protection with current sensing and metering. Business Impact: Accurate motor health data supports proactive maintenance and energy optimization, cutting unplanned downtime. Application: Medium-size motors in process and utilities. Feature: 4 DI / 4 DO I/O options and 1 AO. Business Impact: Consolidates control and monitoring signals into a single device, simplifying wiring diagrams and field updates. Application: Machines with integrated safety and sequence control. Feature: Projection mounting, fixed CT term, and MP Term Conv. Business Impact: Easier cabinet installation and robust mechanical fit, reducing commissioning time. Application: Panel builders and retrofit projects in established engineering standards. Feature: Sensing inputs cover Current Protection and Metering. Business Impact: Direct measurement reduces need for separate metering devices, lowering total cost of ownership. Application: Motor protection schemes in critical production lines.
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FAQs
Installation begins with mounting the relay using the projection mounting option and wiring the 4 digital inputs, 4 digital outputs, and the single analog output. The device supports fixed CT term and MP term conversion, which simplifies integration with MP-3000 settings. Ensure RS-485 communication lines are correctly terminated for Modbus RTU or DNP3 RTU operation and verify IRIG-B interface connections for time synchronization in your control network.
The EMR-3MP0-2A9BB1-1 supports Modbus RTU and DNP3 RTU over RS-485, with an IRIG-B interface for precise time stamping. This enables seamless integration with SCADA systems and remote diagnostics, allowing you to monitor motor protection status from a central control room while maintaining robust resilience in harsh industrial environments.
The device is rated for up to 5A phase current, with current protection and metering built in. This makes it well-suited for medium-sized motors in manufacturing and process environments. For very high-current motors, evaluate load profiles and consider parallel protection strategies or larger-rated relays, ensuring the chosen device remains within its electrical specifications.
Compliances are listed as Contact Manufacturer. Always confirm specific certifications—such as CE marking or IP ratings—and any SIL requirements with Eaton prior to purchase or deployment, to ensure the product meets your regional regulatory and safety standards for the intended installation.
By consolidating motor protection, metering, and communication into a single device, you reduce wiring complexity, shorten commissioning times, and improve downtime visibility. The integrated metering and remote diagnostics support proactive maintenance, which lowers unplanned outages and extends motor life, delivering a favorable total cost of ownership over the device’s service life.