Simple digital turnout receiver with c80 decoder.

This is a development of digital turnout receiver with c80 HO locomotive decoder.

Basic concept:

• This unit developed for temporary layout.
• Very simple for hook up. Just put in the turnout with this receiver in temp. layout.
• No additional equipment is required more than #6021 control unit.

Comparison with k83 turnout decoder:

• #6040 Keyboard is not required.
• No long three-line wirings from decoder are not required.
• The turnout can be set up at any point of the layout with out wiring.

How does it works?:

• Setup:
  • Put the turnout on the site that you want to put in.
  • Connect two wires(Red/ Brown) to appropriate rail.
• Operation(on #6021):
  • Call the address that set on c80 decoder.
  • Push 'off' button up to one second.
  • The lead rail moves opposite position.

Circuit:

Bottom view of circuit board.

Click the image for clearer drawing.

The dotted lines are jump wire on upper side of the circuit board.

Bottom view of relay.

Relay: Matsushita(NAiS) :DS2E-M-DC24V, Condenser: 470uF / 50V

Sequence of circuit:

1. The Lf/Lr of c80 pull down to ground(=push 'off' button).
2. One of condenser('C') become charged by current thru micro switch in turnout mechanism #5625. The current for coil of #5625 still interrupt by relay contact NO(normally open).
3. When the charge of 'C' completed, the coil of relay magnetized.
4. The current for opposite coil from existing position of turnout mechanism #5625 turned on by relay contact NO(normally open). Simultaneously, another coil of #5625 is shut down by relay contact NC(normally close).
5. When the lead rail have moved to another position, the current for coil of #5625 is cut off. In this phase opposite coil is simultaneously connected to power source, but relay keeps former position by means of charge of condenser. So the turnout mechanism does not chatter from one side to another side.
6. If c80 turned off during charge of condenser is remaining, The lead rail stays at the position.
7. After charge of condenser lasted, the circuit waiting for next pulse from c80.

Fitting to the box.

• The circuit and c80 installed in small box.
• Two wires with track clip #56031 clip to two rails.
• Five wires connect to terminal of #5625 turnout mechanism(1-4 and L).
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Copyright © 2000 by Jun Maeda / KOBE JAPAN