Eaton EMR-4000-2A1BA1 Motor Relay - RS-485
Part Number: EMR-4000-2A1BA1
Quick Summary
Eaton motor relay EMR-4000-2A1BA1 provides reliable motor control and protection for industrial drives. Engineers often struggle with multi-protocol integration, wiring complexity, and space constraints in control panels. Typical certifications for motor relays include CE, UL, and IP-rated enclosures; confirm exact approvals with the manufacturer. By combining RS-485 communication, broad voltage ranges from 19 to 300 Vdc and 40 to 250 Vac, and rich I/O, this device streamlines deployment. For OEMs and end users, it translates to faster commissioning, improved data visibility, and lower total cost of ownership through integrated protection and metering.
Product Information
Extended Description
EMR-4000-2A1BA1 Eaton: Eaton, motor relay, 5A, 1A, Motor, over RS-485, 19-300Vdc, 40-250Vac, Power Protection and Metering,Voltage Protection and Metering,Current Protection and Metering, Sensitive Ground Input,IRIG-B,URTD Interface
Product Name
Eaton motor relay
Catalog Number
EMR-4000-2A1BA1
UPC
786679146989
Product Length/Depth
8.06 in
Product Height
8.7 in
Product Width
9.72 in
Product Weight
9.259 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
Contact Manufacturer
Application
Motor
Type
Motor relay
Analog inputs
0
Phase current
5A, 1A
Analog outputs
4
Digital inputs
8
Digital outputs
5
I/O options
Sensitive Ground Input IRIG-B URTD Interface
Modbus / DNP3 RTU
over RS-485
Sensing inputs
Power Protection and Metering Voltage Protection and Metering Current Protection and Metering
Zone selective interlocking
1
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-4000-2A1BA1
Feature: Wide voltage range and protective functions. Benefit: Enables reliable operation across global sites and reduces the need for multiple devices, lowering BOM cost. Application: Motor control panels requiring 19–300 Vdc / 40–250 Vac operation with integrated protection and metering. Feature: RS-485 communication with Modbus/DNP3 RTU. Benefit: Simplifies integration with SCADA/PLCs and enables robust remote monitoring. Application: Industrial drive systems needing seamless data exchange. Feature: Rich I/O set (8 digital inputs, 5 digital outputs, 4 analog outputs, 0 analog inputs). Benefit: Flexible signaling for complex control schemes, reducing wiring complexity. Application: Custom motor protection schemes and metering data acquisition. Feature: I/O options (Sensitive Ground Input, IRIG-B, URTD Interface). Benefit: Time-stamped diagnostics and precise event logging for high-availability systems. Application: Mission-critical panels with demanding instrumentation. Feature: Zone Selective Interlocking support. Benefit: Reduces fault energy and improves selective tripping, enhancing system reliability. Application: Protection schemes in power distribution and motor drives. Feature: Sensing inputs for Power, Voltage, and Current Protection and Metering. Benefit: Consolidates protection and metering functions in one device, improving data quality. Application: Energy management and protective relays in motor-driven equipment. Feature: Compact enclosure footprint and Eaton warranty. Benefit: Easier installation and predictable support lifecycle. Application: OEM assemblies and retrofit projects seeking efficiency and support.
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FAQs
Plan for Modbus/DNP3 RTU over RS-485 wiring with proper line termination and biasing. Connect IRIG-B and URTD interfaces as needed, and verify the 8 digital inputs, 5 digital outputs, 4 analog outputs, and 0 analog inputs align with your PLC/SCADA topology. Ensure physical mounting accommodates the device size and fits within panel clearances to prevent heat buildup.
Key specs include two phase current sensing values (5A and 1A), voltage support from 19–300 Vdc and 40–250 Vac, and integrated protection with Power, Voltage, and Current metering. The device offers 8 DI, 5 DO, 4 AO, and I/O options for precise control, plus Zone Selective Interlocking to optimize protection during faults.
Yes. The relay provides motor protection combined with metering data, RS-485 connectivity for SCADA integration, and optional IRIG-B/URTD interfaces for time-stamped diagnostics. Its flexible signaling (8 DI/5 DO/4 AO) supports complex panel logic and energy-management workflows while enabling accurate monitoring of power quality and motor health.
Current documentation shows Compliances: Contact Manufacturer; regional approvals such as CE, UL, or IP ratings may apply depending on installation location. Always confirm exact certifications with Eaton for your market, ensure the product meets local electrical safety and interoperability requirements, and review warranty terms aligned with the shipment policy.
ROI improves through reduced wiring complexity, consolidated protection and metering, and smoother integration with RS-485 networks, leading to faster commissioning and lower maintenance costs. The warranty spans one year or eighteen months from shipment, whichever occurs first. With solid‑state I/O and robust design, ongoing maintenance is typically minimal, focusing on periodic checks and firmware updates as needed.