
Why Reliable Communication Matters in Industrial Networks
In modern manufacturing, seamless data exchange between controllers and field devices is the backbone of operational efficiency. A single communication failure can halt production lines, leading to costly downtime and delayed shipments. The Schneider Electric 170PNT11020 communication adapter addresses this challenge by providing a dependable link within Modicon Momentum systems, ensuring that critical data flows without interruption.
As factories embrace digitalization and Industry 4.0 initiatives, the demand for robust, legacy-compatible communication solutions grows. The 170PNT11020 supports this transition by integrating proven Modbus Plus technology with the flexibility needed for expanding networks. Its token bus and peer-to-peer access method enables efficient, deterministic communication, making it a practical choice for both existing and new installations.
Introducing the 170PNT11020 Communication Adapter
The 170PNT11020 from Schneider Electric is a communication adapter specifically engineered for the Modicon Momentum automation platform. It acts as a gateway between the Momentum I/O base and a Modbus Plus network, enabling seamless data transfer using twisted pair cabling. This adapter is designed for industrial environments, offering a compact and lightweight form factor that simplifies installation and maintenance.
With a baud rate of 1 megabit per second, the 170PNT11020 ensures fast and reliable data exchange, suitable for time-sensitive control applications. The adapter supports up to 31 devices per segment and up to 64 devices across all segments, providing scalability for growing systems. Its redundant 9-pin D-Sub connectors allow for network redundancy, enhancing system availability and fault tolerance.
Key Technical Specifications at a Glance
Understanding the technical parameters of the 170PNT11020 is essential for ensuring proper integration and performance. Below are the critical specifications derived directly from the product datasheet:
- Communication Protocol: Modbus Plus
- Baud Rate: 1 megabit per second
- Access Method: Token bus and peer-to-peer (P2P)
- Transmission Medium: Twisted pair cable
- Number of Devices: 0 to 31 per segment, 0 to 64 for all segments
- Maximum Cable Distance: Approximately 16,404 feet (5,000 meters) with repeater
- Ambient Operating Temperature: 0 to 60°C (non-condensing)
- Storage Temperature: -40 to 85°C (non-condensing)
- Protection Class: IP20
- Electrical Connection: Two 9-pin D-Sub connectors (for network and redundant network)
- Compliance Standards: UL, CSA, and CE
- Operating Altitude: Less than 16,404 feet (5,000 meters)
- Weight: 1.00 lbs (0.45 kg)
These specifications highlight the adapter's suitability for a wide range of industrial applications, from small machine control to large distributed systems. The IP20 rating provides basic protection against dust and accidental contact, while the wide temperature range ensures reliable operation in demanding environments.

Real-World Applications and Use Cases
The 170PNT11020 is ideal for applications where reliable communication between PLCs and remote I/O is critical. In a typical material handling system, for example, the adapter can connect a Momentum PLC to multiple conveyor control nodes, ensuring real-time status updates and coordinated motion. Its support for up to 31 devices per segment allows for extensive network layouts without compromising performance.
Another common use case is in process control, where the adapter facilitates communication between a supervisory system and field-mounted Momentum I/O blocks. The redundant D-Sub connectors enable a backup communication path, minimizing the risk of data loss in the event of a cable failure. This redundancy is particularly valuable in continuous processes where downtime is unacceptable.
For upgrade projects, the 170PNT11020 offers a straightforward path to modernize legacy Modbus Plus networks. Its compatibility with Premium and Quantum bus managers (as listed in the product range) ensures seamless integration into existing Schneider Electric architectures, protecting prior investments while enhancing system capabilities.
Comparison with Similar Communication Adapters
When selecting a communication adapter, it's important to compare options based on protocol support, network capacity, and environmental ratings. The following bullet-point comparison highlights how the 170PNT11020 stacks up against typical alternatives in the market:
- Protocol Support: The 170PNT11020 uses Modbus Plus, a proven industrial protocol. Many competing adapters support only Modbus RTU or TCP/IP, which may require protocol conversion in legacy systems.
- Network Capacity: With support for up to 64 devices across all segments, the 170PNT11020 offers higher scalability than many entry-level adapters that handle only 32 nodes.
- Redundancy: The dual 9-pin D-Sub connectors provide built-in redundancy, a feature often missing in lower-cost adapters, enhancing network reliability.
- Environmental Tolerance: Operating from 0 to 60°C and storage from -40 to 85°C, the 170PNT11020 matches or exceeds the ratings of most industrial adapters, ensuring dependable performance in harsh conditions.
- Certifications: UL, CSA, and CE certifications ensure compliance with North American and European safety standards, making it suitable for global installations.
This comparison demonstrates that the 170PNT11020 offers a balanced combination of performance, scalability, and reliability, making it a strong contender for Modbus Plus network applications.

Business Value and ROI
Investing in the 170PNT11020 delivers tangible business benefits. Its robust design and redundant communication paths reduce the likelihood of network failures, directly minimizing unplanned downtime and associated production losses. The adapter's support for up to 64 devices means fewer network segments and less cabling, lowering installation and maintenance costs.
Furthermore, the 170PNT11020's compliance with UL, CSA, and CE standards simplifies regulatory approvals, accelerating project timelines. Its lightweight design (1.00 lbs) reduces shipping and handling costs, while the wide operating temperature range ensures reliable operation in diverse environments, from cold storage facilities to hot manufacturing floors.
By choosing the 170PNT11020, you are not just purchasing a component; you are investing in operational continuity and long-term cost savings. The adapter's proven technology and Schneider Electric's reputation for quality provide peace of mind, knowing that your communication infrastructure is built to last.
Frequently Asked Questions
What is the maximum number of devices that can be connected to the 170PNT11020?
The 170PNT11020 supports up to 31 devices per segment and up to 64 devices across all segments. This allows for flexible network design, accommodating both small and large installations without the need for additional hardware.
Can the 170PNT11020 be used in redundant network configurations?
Yes, the 170PNT11020 is equipped with two 9-pin D-Sub connectors, one for the main Modbus Plus network and one for a redundant network. This redundancy ensures continuous communication even if one network path fails, enhancing system reliability.
What are the operating temperature limits for the 170PNT11020?
The adapter operates in ambient temperatures from 0 to 60°C (non-condensing) and can be stored in temperatures ranging from -40 to 85°C. This wide range makes it suitable for various industrial environments, including those with temperature fluctuations.
Why Choose SpareTechPLC for Your Automation Needs
At SpareTechPLC, we specialize in providing high-quality industrial automation spare parts and expert guidance. Our team understands the critical role that communication adapters like the 170PNT11020 play in your operations, and we are committed to helping you find the right solutions. With our extensive inventory and fast shipping, you can minimize downtime and keep your production running smoothly.
We stand behind the authenticity and quality of every product we sell. When you order the 170PNT11020 from SpareTechPLC, you receive a genuine Schneider Electric component, backed by our reliable customer support. Contact us today to discuss your requirements and discover how we can support your automation projects.











