MSS Detector Crossover Board

This Barry Draper design conforms to the Modular Signaling System (MSS) standard, first described by Greg Fuhriman in RMJ in the 1990s, as well as the proposed MSS 2.0 standard.  MSS is widely used in the Free-mo world, but its also a great solution for a layout needing basic ABS signaling.  A Crossover board is for a non-signaled module (detection only).  The MSS Detector Crossover Board includes a power supply that is fed by the Free-mo Aux Bus (12 to 14 Volt AC or DCC) and has connectors to communicate with two adjacent modules and a socket for current detector such as our cpOD-M or Dr. Chubb's DCCOD.  The MSS Crossover, a cpOD-M, and two straight-through network cables are all you need to add signal detection to a single track Free-mo module. (two of each for a double track module.)

Schematic (pdf)

Eagle Files (sch and brd)

Gerbers

Bill of Materials

Installation Instructions