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- 172PNN21022
- Modbus Plus Option Adapter
- France
- 25 x 143.1 x 60.06 mm
- 0.085 kg
- Xiamen, China
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Product Overview
The Schneider 172PNN21022 Modbus Plus Option Adapter is a communication option adapter designed for the Modicon Momentum automation platform. It provides a dedicated Modbus Plus communication interface for compatible Momentum processors, allowing industrial controllers to exchange data with devices connected to a Modbus Plus network.
With a single Modbus Plus communication port, the 172PNN21022 provides a practical communication solution for industrial automation systems that require reliable network connectivity between controllers and distributed devices. The adapter is installed as an option module on compatible Momentum processor and I/O base configurations.
The module combines Modbus Plus communication functionality with an integrated real-time clock and battery-backed clock support. Its compact dimensions of 25 × 143.1 × 60.06 mm and low weight of approximately 0.085 kg make it suitable for compact industrial automation installations.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Model | 172PNN21022 |
| Product Type | Modbus Plus Option Adapter |
| Automation Platform | Modicon Momentum |
| Communication Protocol | Modbus Plus |
| Number of Ports | 1 |
| Communication Port Type | Single Modbus Plus port |
| Electrical Connection | 1 × 9-pin D-shell connector |
| Rated Supply Voltage | 5 V DC |
| Input Voltage Tolerance | ±5% |
| Power Supply | Via I/O base |
| Battery Type | Lithium |
| Battery Size | 2/3 AA |
| Battery Life | Approximately 5 years |
| Clock Accuracy | ±13 seconds per day |
| Local Signaling | 1 communication LED |
| Material | Lexan |
| Dimensions | 25 × 143.1 × 60.06 mm |
| Weight | 0.085 kg / 85.05 g |
| Module Format | Standard |
| Dielectric Strength | 500 V DC |
| Protection Rating | IP20 |
| Typical Application | Industrial automation and Modbus Plus communication |
Function and Working Principle
The primary function of the 172PNN21022 is to add a Modbus Plus communication interface to a compatible Modicon Momentum automation system. The adapter provides a dedicated network connection between the Momentum processor and other nodes on the Modbus Plus network.
In a typical application, the communication architecture can be represented as:
Momentum Processor → 172PNN21022 → Modbus Plus Network → Remote Controllers / Devices
The adapter processes communication between the Momentum control system and connected Modbus Plus nodes. This allows industrial devices to exchange control information, process data, operating status, diagnostic information, and other system data.
The module provides a single Modbus Plus port through a 9-pin D-shell connection. The communication interface is specifically intended for Modbus Plus networking rather than standard Ethernet communication.
The adapter also incorporates battery-backed time-of-day clock functionality. The clock provides approximately ±13 seconds per day accuracy, while the 2/3 AA lithium battery provides an expected service life of approximately five years under specified conditions.
Role in Industrial Control Systems
The Schneider 172PNN21022 plays a communication role within the Modicon Momentum architecture. It allows a compatible Momentum processor to participate in a Modbus Plus network and exchange information with other network nodes.
Modbus Plus can be used in industrial control architectures where multiple controllers and automation devices need to share data. The 172PNN21022 therefore acts as the communication link between the Momentum processor and the network.
Typical communication partners may include:
- Modicon Momentum processors
- Modbus Plus controllers
- Distributed automation devices
- Remote I/O systems
- Industrial control stations
- Modbus Plus network nodes
- Supervisory control equipment
- Industrial monitoring systems
By providing network connectivity at the controller level, the adapter helps integrate individual Momentum-based control stations into a larger industrial automation network.
Industrial Applications
The 172PNN21022 is designed for applications based on the Modicon Momentum automation platform where Modbus Plus communication is required.
Factory Automation
Manufacturing systems can use Modbus Plus communication to connect controllers and distributed automation equipment. The 172PNN21022 provides the communication interface required for compatible Momentum processors.
Machine Control
Industrial machines may use multiple controllers and peripheral devices. A Modbus Plus option adapter can integrate the Momentum processor into a wider communication architecture.
Process Automation
Process applications often require controllers and distributed devices to exchange process values and operating status. The 172PNN21022 can support this type of controller-level communication within compatible systems.
Distributed Control
Where multiple control stations are distributed throughout a facility, Modbus Plus networking can provide a communication path between system nodes. The adapter enables a compatible Momentum processor to participate in this network.
Legacy Automation Systems
The 172PNN21022 is particularly relevant to existing Modicon Momentum installations that continue to use Modbus Plus communication. It can help maintain the original network architecture when servicing or replacing automation hardware.
Installation and System Integration
Proper installation is important for reliable operation of the 172PNN21022. Because the module is designed specifically for the Modicon Momentum platform, compatibility should be verified before installation.
1. Verify the Momentum System
Confirm that the target controller and I/O base are compatible with the 172PNN21022 Modbus Plus option adapter.
2. Check the Product Identification
Verify the complete part number:
Schneider 172PNN21022
The original adapter identification should be compared with the replacement before installation.
3. Install the Option Adapter
The adapter is integrated with the compatible Momentum processor and I/O base configuration. Ensure that the module is seated correctly and that the mechanical connection is secure.
4. Connect the Modbus Plus Network
The communication connection is provided through the module’s 9-pin D-shell Modbus Plus connector. Use the appropriate Modbus Plus network cabling and connection accessories for the system architecture.
5. Configure the Network Address
The Modbus Plus node address must be correctly configured according to the network design. Each network node should have an appropriate and unique address to avoid communication conflicts.
6. Check the Communication LED
The adapter includes a local communication LED. After startup, the LED indication should be checked to verify network activity and identify potential communication problems.
7. Verify Battery Condition
The adapter uses a 2/3 AA lithium battery for its time-of-day clock function. Battery condition should be considered during long-term maintenance, especially in older Momentum installations.
Compatible System Components
The 172PNN21022 normally works as part of a larger Modicon Momentum system rather than as an independent communication device.
| Component | Typical Function |
|---|---|
| Modicon Momentum Processor | Executes control logic and manages the automation application |
| Momentum I/O Base | Provides the system interface and power path for the option adapter |
| Modbus Plus Network Cable | Provides the physical communication connection |
| Modbus Plus Connector Accessories | Provides network connection and termination functions |
| Remote Modbus Plus Nodes | Exchange data with the Momentum controller |
| Distributed I/O | Provides field-level inputs and outputs |
| Industrial Control Equipment | Provides additional control, monitoring, and process functions |
Recommended Alternative Models
The following models are related to the 172PNN21022 within Schneider’s Momentum and Modbus Plus communication architecture. They should not automatically be considered direct replacements because communication configuration and redundancy requirements can differ.
| Model | Type | Key Feature | Application |
|---|---|---|---|
| 172PNN21022 | Modbus Plus Option Adapter | Single Modbus Plus port | Momentum processor communication |
| 172PNN26022 | Modbus Plus Option Adapter | Redundant Modbus Plus ports | Applications requiring redundant network connections |
| 172JNN21032 | Serial Link Option Adapter | RS-232 / RS-485 Modbus serial communication | Momentum serial communication applications |
| 170PNT11020 | Modbus Plus Communication Module | Modbus Plus network interface | Distributed Momentum I/O communication |
| 170PNT16020 | Redundant Modbus Plus Module | Redundant network communication | Higher-availability automation networks |
For a direct replacement, the 172PNN21022 should normally be selected when the existing system specifically requires a single-port Modbus Plus option adapter. The 172PNN26022 may be considered when redundant Modbus Plus communication is required, but it is not an identical replacement.
Key Advantages
- Provides dedicated Modbus Plus communication for compatible Momentum systems
- Single Modbus Plus communication port
- 9-pin D-shell network connection
- Compact dimensions of 25 × 143.1 × 60.06 mm
- Low weight of approximately 0.085 kg
- 5 V DC rated supply through the I/O base
- Integrated time-of-day clock functionality
- Approximately ±13 seconds per day clock accuracy
- 2/3 AA lithium battery support
- Communication status LED
- Suitable for existing Modicon Momentum automation installations
- Useful for maintaining established Modbus Plus network architectures
Technical FAQs
What is the Schneider 172PNN21022?
The Schneider 172PNN21022 is a Modbus Plus Option Adapter designed for the Modicon Momentum automation platform. It provides a single Modbus Plus communication port for compatible Momentum processors.
What is the main function of 172PNN21022?
Its main function is to provide Modbus Plus network connectivity for a compatible Momentum automation system, allowing the controller to exchange data with other Modbus Plus nodes.
What are the dimensions of 172PNN21022?
The dimensions are 25 × 143.1 × 60.06 mm.
How much does the Schneider 172PNN21022 weigh?
The product weight is approximately 0.085 kg, or 85.05 grams.
What communication protocol does 172PNN21022 use?
The adapter uses the Modbus Plus communication protocol and provides one Modbus Plus communication port.
What connector does the 172PNN21022 use?
The adapter provides one 9-pin D-shell connector for Modbus Plus communication.
What voltage does the 172PNN21022 require?
The rated supply voltage is 5 V DC, with an input voltage tolerance of approximately ±5%. The supply is provided through the I/O base.
Does the 172PNN21022 have a battery?
Yes. The adapter uses a 2/3 AA lithium battery for its time-of-day clock function. The specified battery life is approximately five years under applicable conditions.
What is the difference between 172PNN21022 and 172PNN26022?
The 172PNN21022 provides a single Modbus Plus port, while the 172PNN26022 is designed for redundant Modbus Plus communication. They should therefore be selected according to the network architecture rather than treated as identical replacements.
Can 172JNN21032 replace 172PNN21022?
No, they provide different communication functions. The 172PNN21022 is a Modbus Plus option adapter, while the 172JNN21032 is a serial communication option adapter. The correct model depends on the communication architecture of the Momentum system.
Conclusion
The Schneider 172PNN21022 Modbus Plus Option Adapter is a compact communication module designed for the Modicon Momentum automation platform. With a single Modbus Plus port, 9-pin D-shell connection, 5 V DC rated supply, integrated time-of-day clock, and battery support, it provides the communication interface required by compatible Momentum processors.
Measuring 25 × 143.1 × 60.06 mm and weighing approximately 0.085 kg, the 172PNN21022 is suitable for compact industrial automation installations. Its primary value is maintaining reliable Modbus Plus communication between Momentum controllers and other compatible network nodes.
For maintenance engineers and industrial automation system integrators, the most important consideration is to verify the complete 172PNN21022 part number, Momentum processor configuration, network requirements, and communication architecture before replacement. When the application requires a single-port Modbus Plus interface, the 172PNN21022 provides a practical solution for maintaining established Schneider Modicon Momentum control systems.