your portal to more fun in scale model railroading
your portal to more fun in scale model railroading
The NMRA, in its standards and recommended practices, addresses only the specific standards and recommended practices for model railroads. These standards and recommended practices do not address any legal requirements. It is the responsibility of the manufacturer to determine if their product conforms to all applicable governmental laws and regulations.
| Document | Posted | Comments End |
|---|---|---|
| S-9.3.2 BiDirectional Communication | 03-Jan-21 | Not Set |
| S-9.2.1.1 Advanced Extended Packet Format | 23-Jun-24 | Not Set |
| S-9.2.2 Configuration Variables | 08-May-25 | Not Set |
| S-9.4.1 SUSI Bus Communication Interface | 29-June-25 | Not Set |
| S-9.4.3 SUSI Bus Bidirectional Extension | 8-Jly-2025 | Not Set |
| RP-37 Locomotive and Tender Drawbars | 15-Aug-2025 | 17-Sep-2025 |
| S-9.1.1.6 E24 Decoder Interface | 15-Aug-2025 | Not Set |
| TN-9.1.1.6 E24 Decoder Interface | 15-Aug-2025 | Not Set |
| TI-9.1.1 Sources for Connectors for DCC | 15-Aug-2025 | Not Set |
| Document | Posted | Voting Ends |
|---|---|---|
| There are currentlt no documents for voting |
| Document | Associated | Posted | Comments End |
|---|---|---|---|
| S-9.2.4 DCC Fail Safe | None | 02-Jly-2025 | 12-Oct-2025 |
| Document | Submitted | Approved |
|---|---|---|
| There are currentlt no documents for BOD approval. |
Previous document revisions were submitted to the Board of Directors and approved are now on the Standards page.
If you need additional information or wish to make further inquires regarding NMRA Standards, please contact the NMRA Standards & Conformance Department at tech-chair [at] nmra.org, CIManager [at] nmra.org or dcc-manager [at] nmra.org
National Model Railroad Association, Inc.
Department #635
P.O. Box 1328, Soddy Daisy TN 37384-1328
Phone: (423) 892-2846 - Fax: (423) 899-4869