Reply to "Trouble shooting Atlas O Guage switch motors"

@gunrunnerjohn posted:

Well, I'd certainly rather have the Z-Stuff DZ-1000 switch motors than the Atlas twin-coil ones, they are very prone to cooking a coil and they're dead.

No access below eliminates the really good switch machines like the Tortoise switch machines.

Atlas 6924 relay board was added to inhibit motor burn-out, along with other (dead rail) functions, that improved switch traverse.   

Probably difficult to find these boards.

Note: One board can operate a switched cross-over pair.  The 21 relay boards, pictured below, operate 24 switches.  There are (3) sets of paired cross-over switches.

DZ 1000 design has a switch, that dis-connects power to the switch motor, once the throw is complete.

The DZ 1000 requires the addition of a DZ1008 latching relay, for more complex switch functions.

Atlas 6924 Relay board wiring, with two track circuits, each track circuit is fused. Non-derail, auto switching is part of the relay function(s).

Have fun, Mike CT.