Littelfuse RM1000 - The RM1000 is a motor-monitoring device to be used in conjunction with the 777 family of products (excluding the P1 Series), 77C family of products and the 601 voltage monitors, via Modbus protocol with a communications module. The RM1000/777 motor management system combines unsurpassed electronic motor protection and critical, user-friendly, motor monitoring. The RM1000 can monitor up to 16 relays through an RS-485 network using Modbus RTU protocol. A second communication port allows monitoring and control of up to 99 relays from a computer, PLC, DCS or SCADA system and can be accessed from the host computer or PLC with the RM-1000 acting as a repeater for any of its motor protectors. In addition to the monitoring functions, the RM-1000 can be used to reset a tripped relay.
Littelfuse

RM1000

Alternate Item Number: RM1000

UPC: 079458998191


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Overview

The Littelfuse RM1000 is a motor-monitoring device designed for integration with the 777 family (excluding P1 Series), 77C family, and 601 voltage monitors using Modbus RTU protocol. This advanced system delivers electronic motor protection and user-friendly monitoring for critical applications. The RM1000 supports monitoring of up to 16 MotorSaver® and/or PumpSaver® relays via an RS-485 network, while a second communication port enables control and monitoring of up to 99 relays from a computer, PLC, DCS, or SCADA system. Acting as a repeater, the RM1000 enhances connectivity across motor protectors and allows remote resetting of tripped relays to minimize downtime. The device is easily mounted remotely, improving safety by enabling control and monitoring without opening electrical cabinets, aiding compliance with arc flash safety regulations. The RM1000 features a water and UV-resistant enclosure with NEMA 3R or NEMA 4X (optional) ratings, and UL Type 12 certification for the RM1000 and RM1000 NEMA 4 models. The RM1000-3R includes weep holes for applications subjected to condensing moisture or humidity. Ideal for industrial motor management, the RM1000 ensures reliable performance and seamless integration with existing systems.
  • Monitors up to 16 MotorSaver® and/or PumpSaver® relays via RS-485 Modbus RTU network
  • Second communication port enables control and monitoring of up to 99 relays from PLC, DCS, SCADA, or PC
  • Acts as a repeater for motor protectors, enhancing connectivity and control
  • Supports remote resetting of tripped relays to reduce downtime
  • NEMA 3R or NEMA 4X (optional) rated enclosure with UL Type 12 certification (RM1000 & RM1000 NEMA 4)

Specifications

Brand Name
Littelfuse
Mounting
Surface mountable on backplane using 4 crews
Number Of Poles
Surface mountable on backplane using 4 crews
Operating Temperature
-40 to 158
Operating Temperature, Maximum
158
Operating Temperature, Minimum
-40
Standard
UL/CSA/CE
Sub Brand
Symcom
Package Dimensions (L x W x H)
0.9 IN x 4.54 IN x 3.62 IN
Package Dimensions (L x W x H)
22.9 mm x 115.4 mm x 91.9 mm
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Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.