Schneider Electric 170NEF16021 Modicon Momentum Modbus Plus Communication Adapter

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Fabricante: Schneider Electric
Nº do Produto: 170NEF16021
País de origem:França
Tipo de Produto: PLC Communication Modules
Pagamento: T/T, Western Union
Peso: 210g
Dimensões: 18.0 x 26.0 x 5.5 cm
Porto de embarque: Xiamen
Garantia: 12 meses

Facilitating high-availability network topologies, the Schneider Electric 170NEF16021 serves as a dedicated Modbus Plus communication adapter with redundant ports for the Modicon Momentum platform. This module mounts directly onto Momentum I/O bases, enabling distributed field devices to communicate over a dual-path Modbus Plus network for enhanced fault tolerance in mission-critical control architectures.

Key Features

Redundant Modbus Plus Ports: Dual DB9 connectors provide physical media path redundancy to prevent communication loss in the event of a cable break.
Direct Base Integration: Snaps directly onto any Modicon Momentum I/O base, eliminating the need for external backplanes or inter-module wiring.
Protocol Support: Fully compatible with Modbus Plus (984) token-ring database and peer-to-peer communication structures.
Diagnostic Indicators: Front-facing LEDs provide real-time status updates for network activity, port health, and module diagnostics.

Applications

High-availability water and wastewater treatment facilities.
Continuous process industries requiring redundant communication paths.
Legacy Modicon 984 and Quantum control system migrations and expansions.
Distributed telemetry and SCADA RTU networks.

Technical Specifications

Parameter	Specification
Manufacturer	Schneider Electric
Brand / Range	Modicon Momentum
Model Number	170NEF16021
Product Type	Modbus Plus Communication Adapter (Redundant)
Communication Ports	2 x Modbus Plus (DB9 Female)
Network Topology	Token Ring (Redundant Path)
Product Lifecycle Phase	Phase-Out (Legacy)
Commodity Code	85389091
Shipping Weight (Calculated)	0.21 kg
Package Dimensions (Calculated)	18.0 x 26.0 x 5.5 cm

Connections and Interfaces

Port / Terminal	Interface Type	Function / Assignment
Port A	9-pin D-sub (DB9) Female	Primary Modbus Plus Network Cable Connection
Port B	9-pin D-sub (DB9) Female	Secondary (Redundant) Modbus Plus Network Cable Connection

Alternative Models & Compatibility

The 170NEF16021 is designed specifically for redundant Modbus Plus network layouts. If physical media redundancy is not required, the single-port 170NEF11021 adapter can be utilized as a non-redundant alternative. Ensure that your network configuration software (such as Modsoft, Concept, or Unity Pro / EcoStruxure Control Expert) is configured for dual-cable operation when deploying the redundant variant.

Application Pitfalls & Engineering Notes

Modbus Plus networks require strict adherence to trunk-and-drop cabling rules. The drop cable length from the tap to the 170NEF16021 must not exceed 10 feet (3 meters). Additionally, cumulative drop cable lengths across the entire segment must be factored into the overall network length calculations to prevent token rotation timeouts and communication retries.

Commissioning & Wiring Tips

When wiring the redundant ports, ensure that Port A on all adapters is connected to the primary trunk cable, and Port B is connected to the secondary trunk cable. Crossing the primary and secondary paths can cause network synchronization errors. Set the unique node address using the DIP switches on the associated Momentum I/O base before snapping the communication adapter into place.

Installation Guidelines

CRITICAL WARNING

De-energize all power sources supplying the Modicon Momentum I/O base and associated field wiring before mounting or removing the communication adapter. Failure to do so can cause electrical arcing, damage internal backplane contacts, or initiate unexpected control system states.

Verify that the node address DIP switches on the Momentum I/O base are set to the correct, unique address assigned to this node on the Modbus Plus network.

Align the 170NEF16021 adapter with the interface connectors on the front of the Momentum I/O base.

Press the adapter firmly onto the base until the side locking tabs click securely into place, ensuring a flush mechanical connection.

Connect the primary Modbus Plus drop cable to Port A and the redundant drop cable to Port B, tightening the DB9 connector screws to secure the physical connection.

Key Features:

#Modicon Momentum #PLC Communication Modules

What is the primary function of the redundant ports on this adapter?

The redundant ports provide physical media path redundancy. If one Modbus Plus cable path is severed or experiences high noise, communication automatically continues on the alternate path without interrupting control.

How is the network node address configured for this module?

The node address is typically configured using the hardware DIP switches located on the back of the adapter or the associated Momentum I/O base.

Does this adapter require a separate power supply?

No, the adapter derives its operating power directly from the Modicon Momentum I/O base to which it is mechanically snapped.

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TECHNICAL SPECIFICATIONS

Country of origin

Schneider Electric 170NEF16021 Modicon Momentum Modbus Plus Communication Adapter