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Schneider Electric 170NEF11021

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MANUFACTURER: Schneider Electric 
DESCRIPTION: Modbus PLus Communication Adaptor 
PRODUCT TYPE INFO: Modicon Momentum 

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2 Year warranty

Part Number170NEF11021
ManufacturerSchneider Electric
Model #170-NEF-110-21
Warranty2 Year
Module formatStandard
Range of productModicon Momentum automation platform
Product or component typeModbus Plus communication adaptor
Bus manager PLCQuantum
Compact 984
Structure typeIndustrial
Communication port protocolModbus Plus
Method of accessToken bus
Peer to peer
Transmission rate1 Mbit/s
Transmission support mediumTwisted pair
TopologyMultidrop, device connecting by extension or tap off cable
Number of devices0...31 per segment
0...63 all segment
Cable length<= 16404.2 ft (5000 m) with repeater
Data format984
Fail stateFallback to zero
Full scale value
Forcing to state zero
Maintain value
SupplyFrom I/O base
Local signalling1 LED green module powered up or communicating (MB + ACT)
1 LED red communication error network A (ERR A)
1 LED red communication error network B (ERR B)

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Repair Benefits

MRO can restore your failed 170NEF11021 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this 170NEF11021 we also repair drives, motors, PLCs and more, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty 170NEF11021, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 1lb

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Ask about exchanging your faulty 170NEF11021 for credit when ordering from MRO Electric

What is the replacement part number for the Momentum TIO Module 170BDI54250?

  • The replacement part number for the 170BDI54250 is the 170ADI54050 I/O base and also the 170NEF11021 Modbus Plus Communication Adapter.
MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Schneider Electric 170NEF11021 Overview

Part Number 170NEF11021 manufactured by Schneider Electric is designed to enhance the functionality and communication capabilities of the Modicon Momentum automation platform. As a Modbus Plus communication adaptor, this model serves as a crucial link between various devices within industrial settings. These products are manufactured in France and are designed for Material handling, packaging, and textile machines usage. They come with a 2-year warranty from MRO Electric. We also carry Accessories from other manufacturers such as Modicon and ABB.


The 170NEF11021 adopts a standard module format, allowing for easy integration and compatibility with the existing infrastructure. It is specifically designed to work seamlessly with the Quantum and Compact 984 Bus Manager PLCs, ensuring smooth communication and data transfer between these devices.


Operating on the Modbus Plus communication protocol, the 170NEF11021 enables reliable and efficient data exchange. Utilizing a token bus method of access facilitates peer-to-peer communication among connected devices. This approach enhances the flexibility and scalability of the automation system, enabling efficient data sharing and control.


In terms of technical specifications, the transmission rate of the 170NEF11021 is 1 Mbit/s. This high-speed data transfer capability ensures real-time communication and rapid response between devices, optimizing the overall system performance.


The communication adaptor supports twisted pair transmission, providing a reliable and cost-effective means of transmitting data signals. The multidrop topology allows for multi-device connection through extension or tap-off cables, creating a network of interconnected components.

Each segment can accommodate a range of 0 to 31 devices, with a total of up to 63 devices across all segments. The ability to connect numerous devices within a single network enables efficient data exchange and control across the entire system.

The 170NEF11021 also offers impressive cable length capabilities, supporting distances of up to 16,404.2 feet (5,000 meters) with the use of a repeater. This extended cable length ensures installation flexibility.

The data format for the communication adaptor follows the widely used 984 standards, ensuring compatibility with a range of devices and systems. In the event of a failure or disruption in communication, the device incorporates fail-safe mechanisms to maintain system integrity. It can fall back to a zero state, forcing the state to zero, or maintain the last recorded value, depending on the specific requirements of the application.

Power Supply

The power supply for the 170NEF11021 is derived from the I/O base, simplifying the overall power distribution and eliminating the need for additional power sources. This integrated power solution streamlines the installation process and enhances the overall efficiency of the automation system.


The 170NEF11021 is marked with the CE certification, indicating compliance with European safety and performance standards. This certification ensures that the communication adaptor meets the requirements for safe and reliable operation within industrial environments.


To provide users with visual feedback and status information, the accessory incorporates local signaling through LEDs. A green LED indicates that the module is powered up or actively communicating (MB + ACT). Additionally, two red LEDs are used to indicate communication errors. One LED denotes network A errors (ERR A), while the other indicates network B errors (ERR B). These LEDs provide valuable diagnostic information, enabling quick identification and resolution of communication issues.

In summary, the Schneider Electric 170NEF11021 Modbus Plus communication adaptor is a versatile and reliable accessory that seamlessly integrates into the Modicon Momentum automation platform. With its standardized module format, support for the Modbus Plus protocol, flexible installation options, and comprehensive signaling capabilities, it enhances connectivity and communication within industrial environments. The 170NEF11021 is a valuable tool for optimizing automation and control systems, ensuring efficient and accurate data exchange.

Contact Us Today For More Information About Schneider Electric Products

Check out the rest of our Schneider Electric product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 170NEF11021, take a look at more from our Accessories line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 170NEF11021 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.

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