Block detection ?

I would not use IRs. Instead I would use use relays described here. Cheaper and more reliable.

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Dale H

Diesel Dan,

  As usual Dale H gives the correct advise.

PCRR/Dave

OK, I have the problem partialy solved.

I did have DPDT relay in a box and capatitor.  I got them wired in as Dale and the rest had discussed.

I did get the signals to drop to Red just after the train entered the "OS" of the switch. The single switch is a Ross, the two inside rails after the frog are isolated, (the Control Rails).

The problem came up that I can't use the anti derail feature with both tracks. I have a DZ1008 relay attached to the switch machine to tell the signal system which way the switch is lined. By itself, the anti derail worked as intended on both tracks.

With the new relay attached, it is wired to the control rail on one leg, the train completes the circut and signal drops red. If the switch is not lined, it will also line the switch.

With the switch lined the other direction by push button or train, the switch chatters and will not stay lined when the other control rail is connected to the relay. If I take off the control rail wire to the DZ1008 relay, the signal will drop red as I want.

I do have both control rails wired to the same terminal on one side of the relay. The other terminal to ground. When a train enters, the circut is complete to pull down the relay and activate the Signal Board and turn it red. There was no schematic on the relay.I just now thought about the three terminals, maybe the middle terminal is the one that should be grounded.  The other two for each track.

I am close, but more trouble shooting to do.

I will try and make a schematic of  the wiring. Probably confussing what I wrote.

Thanks for all the advice, it has help.

dan

Not sure off hand if DZ1000 motors can be hooked up anti derail without a relay or not. You could do anti derail with 2 DPDT relays,controlled with outside insulated rails on each approach to the turnout. Hook one relay up so it is self latching with one of its own NO contacts in series with a set on the second relay contact NC. With this set up the relay will latch or unlatch as the train approaches depending on the track approach. Use the second set of contacts of one of the relays to throw the turnouts in proper direction using NO,NC and common. The problem with is setup is that it does not have a memory when power is shut off. If that is a problem a twin coiled mechanical latch relay could be used to do the same thing. In either case the trains can not sit on both insulated rails.

The third drawing here shows a relay contact set throwing a turnout in proper direction although it is not anti derail.

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Dale H

The DZ-1000s are wired for anti derail by wiring the contact switch legs to the appropriate common rails of the switch. No need for anything fancy.

Ron

Thank you Ron. I have Atlas switches thrown by capacitor discharge and on my DZ1000s I do not use the anti derail feature.

Dale H

You're welcome Dale. I should add the rails need to be isolated.

Ron