Schneider 172JNN21032 Overview
The Schneider 172JNN21032 is a serial link adapter module designed for the Modicon Momentum automation platform. This component enables reliable communication between control systems and field devices through RS-232 or RS-485 interfaces. Engineers value its compact design and robust construction for industrial environments. This guide explains the technical specifications and practical setup considerations based on the manufacturer's data.
Key Technical Specifications
The module operates on a rated supply voltage of 5 Volts DC, with a tolerance of +/- 5%. It draws 700 milliamperes at 12 Volts DC, which indicates efficient power usage for its class. The adapter supports a single communication port, selectable between RS-232 or RS-485 serial links. It connects via a 9-pin D-shell Modbus Plus connector, ensuring compatibility with legacy and modern systems.
The ambient operating temperature ranges from 0 to 60°C in non-condensing conditions. Storage temperature extends from -40 to 85°C, allowing flexibility in transport and downtime. The unit carries an IP20 protection class, conforming to IEC 529, and features a conformal coating (Humiseal 1A33) for added resistance against moisture and contaminants.
Communication and Connectivity
This adapter uses a single RS-232 or RS-485 port, which you can configure based on your network requirements. The 9-pin D-shell connector supports Modbus Plus, a widely used protocol in industrial automation. One communication LED provides visual status indication, helping technicians quickly verify operational state. The module also includes a lithium battery with an approximate lifespan of five years, ensuring long-term reliability for timekeeping or memory retention.
Environmental and Mechanical Data
The 172JNN21032 withstands vibration of 1 gn at frequencies from 57 to 150 Hz, and shock of +/- 15 gn with an 11 ms half-sine pulse. It operates at altitudes up to 2,000 meters without performance degradation. The module measures 25 mm in height, 143.1 mm in width, and 60.06 mm in depth, with a net weight of 85.05 grams. These dimensions make it suitable for space-constrained panels.
Installation and Best Practices
When integrating this adapter, ensure the supply voltage remains within the specified tolerance to avoid communication errors. Use shielded cables for RS-485 networks to minimize electromagnetic interference, especially in industrial settings. The module's conformal coating provides extra protection, but you should still avoid exposing it to excessive dust or moisture beyond IP20 limits. Verify the battery status during routine maintenance, as the five-year lifespan may require periodic replacement.
For optimal performance, mount the module in a clean, dry location within the recommended temperature range. Check the communication LED regularly to confirm link activity. If you encounter issues, verify the port configuration (RS-232 vs. RS-485) matches your network setup. The module's compliance with standards like UL, CSA, and NEMA 250 type 1 ensures it meets safety and performance expectations.