JD_Reith posted:...Problem: Your drawing shows on the timer relays the connection points attached to the NO part of the relay, but shouldn't the blue wires be attached to the NC? This appears to be the only way I can get it to work, and in my mind makes some sense as the goal of the timer relay is to allow the trolley to pass back over the trigger point without tripping the relays, so when it goes over the point you want the connection broken which would be NC and not NO?
The timer-relay modules is a so-called "Delay ON". In other words, you apply 12V to the inputs on the left, and then after the settable delay interval (say, 10 sec) the relay then turns ON. The IA and IB "triggers" are connected to the NO contacts because you want the trigger delayed by 10 seconds AFTER power is applied to a siding. In other words, you want IA and IB to be disabled (or disconnected) to give the trolley time to power up, hit the bumper, cross over the trigger section without causing a trigger, and enter the mainline. Then after 10 sec, the relay turns ON which enables or connects the trigger section to the circuit when the trolley returns from the mainline.
JD_Reith posted:...Question: Through testing with the wiring as stated above, I found that if both the trolleys are in the position where IA/IB is on the rail, that the relays just chatter and constantly switch back and forth. So my assumption is the trigger point should be short enough the trolley doesn't stop on it, but long enough where it still makes good enough connection to trip the relays? Also would mean the trigger point needs to be up at the very beginning of the isolated center rail?.
Hmm. Not sure why you're seeing this. If both A and B trolleys are "permanently" parked on their respective trigger sections, the circuit should simply toggle back and forth at whatever the delay interval is. So if the Delay-On relays are set to 10 seconds, the power should alternate every 10 sec between the A-siding and the B-siding. It should not chatter.
---
1. Confirm the Delay-On relay module is acting as a Delay-On relay? In other words you apply 12V to the input on the left, and then it waits 10 sec (or whatever) until the relay then clicks on. Of course as soon as you remove the 12V at the input, the relay clicks off.
2. Confirm you have +12V from the wall-wart connected to the outer-rail.
3. Confirm you have set all 4 inputs of the 4-relay module for active-hi trigger using the push-on jumpers.
