FREMO Interlocking
FStw -> General Items
31.07.2005

LotusNet

This is a name for using LocoNet© as a local station net. It is an abbreviation for "Local train utility and security network".

5V LotusNet

The idea is to use this inside a module or inside a console, where short wire runs are used. The 5V LotusNet is derived from the Loconet© and must be connected to it at one single point, for instance at a CU based on a Proto_128, For this electrical connection see the schematic of Proto_128. It uses a 10 pin pin header for easy use.
Pin out, 100mil grid:

1 2   LocoNet Send, TTL level inverted
3 4   LocoNet Receive, TTL level
5 6   Gnd
7 8   Vcc (+5V=)
9 10   reserved for future use

Simply crimp some 10 pin pinhead connector to a 10 wire AWG28 flat cable and your Lotusnet bus is complete. To connect more of them, put some 10 pin pin header to a breadboard.

A single level shifter to adapt the TTL lines to the real LocoNet and a 5V voltage regulator has to be presend in the module. This "logistics" board connects

  • the real LocoNet and power wires between modules
  • the module internal devices that are connected by this 5V LotusNet wireing

Common connectors

A version using fire wire connectors is under discussion. [BA]

The idea is to connect signals and other devices with limited supply requirements with this type of connector TBD [SBor].