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 |
| Document | Posted | Voting Ends |
|---|---|---|
| S-9.2.4 DCC Fail Safe | 02-Jly-2025 | 11-Sep-2025 |
| Document | Associated | Posted | Comments End |
|---|---|---|---|
| There are no documents for member review and comment. |
| Document | Submitted | Approved |
|---|---|---|
| There are no documents for BOD approval at this time. |
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