Ryaninspiron posted:I like questions. I looked into the Bachmann board you mentioned and it appears to be a simple pair of relays and that would not work with these 3 wire pullmor motors. I am pretty sure Lionel had one at one point but I have not seen it yet. I believe I can control the pullmor with a set of 4 triacs (solid state switches basically) but again I again I have no references on that yet. I have a few ideas on how I could design a digital e-unit with the 3 wire output(not to be confused with a brushless speed controller).
Clearly, you can control a Pullmor motor with four triacs, Lionel has done it for many years with the LCRU and then the ACDR motor controller. 
The LCRU made it's entrance around 1996, and the ACDR for modular boards around 2000.
