Smart-N Module Standards: Revision History
Revision 2.5,
22 February 2009 (current)
- Makes PowerPole-based inter-module wiring mandatory, replacing the
earlier jumper-wire system. Essentially, this incorporates the optional
2007 Extension into the standard.
- Section 2.3: Electrical jumpers are no longer required.
- Section 4.1: Crimped electrical joints are now permitted. Color coding
for the mainline wiring is established.
- Section 4.2: PowerPole-equipped "pigtails" are incorporated
as part of the connector block. Connector blocks are now permitted to
be placed up to 6.00" from the interface.
- Section 5.1: Skyboards are no longer recommended; their use is entirely
at the module-builder's discretion.
- An Appendix has been added to describe PowerPole connectors and related
terms.
- Introduced the use of Anderson PowerPole connectors for inter-module
wiring, as an optional replacement for the jumper-wire system described
in Revision 2.01.
- Section 1.2: Updated MARRS web site to reflect new "marrsweb.org" URL.
- Section 2.3: Removed spring clamps as a permissable clamp type. Added a requirement to
provide Snap-Track for joiners at the interface.
- Section 4.3: Removed the requirement for interface isolation on modules with over
three feet of mainline distance; replaced it with a recommendation for
isolation for modules with over four feet of mainline.
Revision 2.00, 07 October 2005
- Complete rearrangement and write-through to improve organization.
- The role of MARRS in creating and maintaining the standard is
made more explicit.
- The MARRS-specific "Right of Refusal" is replaced with a more
general "Authority of the Standard" section.
- Descriptions of possible module types, and several of the related
"Recommended" practices, are now separated from the standard; this
information is now found in the Smart-N Module Design Guide.
- Minimal acceptable wiring for mainline wiring is increased from
22 gauge to 18 gauge.
- Original version of the Smart-N standard.
- Although not officially ratified until May, this standard was used to
design the modules used for the first Smart-N setup in March 1998, and
the first public showing at the Great Scale Model Train Show one month
later.
Go to:
MARRS Home Page
Email:
Rob Madson, MARRS Web POC and Site Maintainer