Schneider Electric 170NEF11021

Schneider Electric 170-NEF-110-21 Modbus Plus Communication Adapter

The Schneider Electric 170-NEF-110-21 is a robust Modbus Plus communication adapter designed for seamless integration within the Modicon Momentum automation platform. This accessory is ideal for connecting industrial devices, enhancing interoperability across automation systems. As a communication interface, the 170-NEF-110-21 facilitates high-speed data transfer in industrial settings, using the Modbus Plus protocol, which is widely recognized for its reliability in automation environments. The module comes with a 2-year warranty from MRO Electric and Supply, ensuring quality and reliability, along with free shipping.

Compatibility with Industrial Systems

This Modbus Plus adapter is compatible with Quantum and Compact 984 PLC systems, making it versatile and adaptable across a range of industrial applications. Designed for industrial structure types, the 170-NEF-110-21 operates within the robust framework of Modicon Momentum and communicates effectively with other Modbus Plus-enabled devices. The device manager protocol ensures communication across multiple devices and systems, offering an efficient network solution for complex industrial settings.

Modbus Plus Communication Protocol

The 170-NEF-110-21 supports the Modbus Plus communication protocol, a reliable token-based protocol that allows peer-to-peer connectivity within a network. The token bus access method enables smooth and stable communication across connected devices, providing a structured framework for data transfer. Operating at a transmission rate of 1 Mbit/s, this module ensures rapid data exchange, enhancing real-time communication within the network. It also supports twisted-pair cabling, a robust medium for industrial environments, helping to minimize electromagnetic interference.

Network Topology and Device Capacity

Supporting a multidrop topology, the 170-NEF-110-21 is designed for flexible connectivity with various devices in a network. It allows for device connections via extension or tap-off cables, with a capacity for 0 to 31 devices per segment or up to 63 devices across all segments. The cable length capability is an impressive 16,404 feet (5,000 meters) when using a repeater, providing extensive reach within large-scale industrial facilities.

Data Management and Fail-Safe Features

Data handling with the 170-NEF-110-21 follows the 984 data format, maintaining compatibility with established industrial standards. The adapter’s fail state feature includes fallback to zero, full scale value, forcing to state zero, and maintain value options, allowing for a fail-safe response in case of communication failure. This helps to prevent unexpected system disruptions and ensures that the network remains operational even if a specific communication issue occurs.

Power Supply and Status Indicators

The 170-NEF-110-21 is powered directly from the I/O base, eliminating the need for an external power source and simplifying installation. For easy diagnostics, the module includes local signaling with three LEDs: a green LED indicating the module is powered or communicating (MB + ACT), and two red LEDs signaling communication errors on networks A (ERR A) and B (ERR B). This feature allows for quick troubleshooting and helps ensure consistent performance within the network.

Frequently Asked Questions (FAQ)

1. What types of PLCs are compatible with the 170-NEF-110-21?
The 170-NEF-110-21 is compatible with Quantum and Compact 984 PLCs, providing a versatile communication solution for these systems.

2. What is the maximum transmission distance for this module?
With a repeater, the module supports a maximum cable length of up to 16,404 feet (5,000 meters), making it suitable for large-scale industrial applications.

3. How many devices can connect to this module in a network?
The 170-NEF-110-21 supports up to 31 devices per segment and a total of 63 devices across all segments, allowing extensive connectivity within a Modbus Plus network.

4. How does the adapter respond in the event of a communication failure?
The 170-NEF-110-21 offers several fail-state options, including fallback to zero, full-scale value, forcing to zero, and maintaining value, ensuring a controlled response during communication interruptions.

5. What indicators are available to monitor module status?
The module includes a green LED indicating power or communication status and two red LEDs for error notification on networks A and B, enabling straightforward diagnostics and maintenance.

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