Product Overview
The Schneider Electric 172JNN21032C is a serial link option adaptor built for the Modicon Momentum automation platform. It gives your system a flexible communication path by supporting either RS232 or RS485 serial links, selectable at setup. When a legacy controller needs to talk to modern peripherals, this compact module keeps the data moving without a full platform change.
For maintenance teams running Momentum installations, this is a practical spares item. It is ready-to-ship from Oil AutoTech, so you can close a communication gap fast and avoid extended downtime.
Key Parameters That Matter
| Specification | Value |
|---|---|
| Product Type | Serial Link Option Adaptor |
| Product Line | Modicon Momentum |
| Communication Port | RS232 or RS485 serial link selectable |
| Supply Voltage | 5 V DC |
| Current Consumption | 700 mA at 12 V DC |
| Battery | Lithium 2/3 AA, 5-year life |
| Local Signaling | 1 LED for communication status |
| Dielectric Strength | 500 V DC |
| Operating Temperature | 0°C to 60°C |
| Dimensions (H x W x D) | 25 mm x 143.1 mm x 60.06 mm |
| Net Weight | 85.05 g |
| IP Rating | IP20 per IEC 529 |
| Certifications | UL, CUL, CE, FM, CSA |
Three specs deserve attention. The selectable RS232/RS485 port lets one adaptor serve different wiring schemes, which reduces the number of spare variants you need on the shelf. The 5-year lithium battery protects memory and clock functions; after a low-battery indication at 40°C, autonomy drops below 30 days, so plan replacement promptly. The 700 mA draw at 12 V DC is modest, but confirm your I/O base supply budget before adding modules.
Where It Fits in the Field
Oil and gas sites often keep Modicon Momentum racks alive well past their original design life. The 172JNN21032C bridges those racks to serial devices such as flow computers, analyzers, and legacy HMIs. In a water treatment plant, it can link a Momentum processor to an RS485 network of remote instruments. In a packaging line, the RS232 mode connects to a barcode scanner or weigh scale without extra conversion hardware.
Because the module handles both serial standards, it also suits mixed-vendor environments where one panel speaks RS232 and another speaks RS485. That flexibility is the core reason buyers keep this part on hand.
Installation and Integration Notes
The adaptor mounts in the standard Momentum module format and receives its 5 V DC supply through the I/O base. Electrical connection uses a 9-pin D-shell connector for Modbus Plus connection. The single LED gives immediate communication status, which speeds up commissioning and fault finding.
When wiring into a fieldbus or serial network, you may need an external gateway or connection module. Confirm cable types, termination, and gateway compatibility with your supplier before installation. The IP20 rating means the module belongs inside a protected enclosure; keep it away from dust, moisture, and direct washdown. Operating temperature is 0°C to 60°C, and storage range is -40°C to 85°C.
Reliability and Maintenance
Inspect the module periodically for loose connectors and LED status. The lithium 2/3 AA battery is the main wear item; track its five-year life and replace it after any low-battery warning. The unit resists vibration at 1 gn from 57 to 150 Hz and shock at 15 gn for 11 ms, so it holds up in typical industrial panels. Conformal coating and TC protective treatment add further durability.
If you need hands-on technical selection help, the team at Oil AutoTech can match this adaptor to your existing Momentum base and serial devices. Contact Oil AutoTech today for pricing and availability.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
