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 Are the switch relays inside the AIU momentary or just switches?

 All try to make this short although there's probably more info needed. I just got some Atlas 2 rail switch motors and I connected them. It's to 2 switches on a crossover to my mainlines so they both throw together. They work. So I got the idea that the AIU could also control them while connected to their momentary switch. I ran my power to the AIU first and tried to jump to the controller, realizing that it wouldn't work unless the controller was depressed while the AIU also passed the power.

 So then I jumpered the power wire to the AIU and the Atlas controller. I sent the other wire to the controller. I jumpered the 2 outputs of the AIU to the 2 screws out on the Atlas controller. I'm thinking that either can send power to the machine that way. I thought it worked for a second and as I played with the direction throws on the AIU I heard just one Atlas machine get stuck on? As soon as I pulled the AIU out of the wiring the machines are fine. So I believe the AIU's Switch #1 got stuck on to one direction? I can't figure out why only one machine stuck on so I'm typing this trying to help me solve my own riddle. Sometimes when I type these posts I answer my own question.

 I must have something crossed so that only one machine is stuck on? If the AIU got stuck I would think both motors would be buzzing.

Maybe I'll wait until the morning for a fresh look. Atlas shows 3 tiny screws to connect the machine. They only supply 2 at the most and in one case, only one screw. To make things more fun I can't find the little knob to throw the switch manually. I don't know if it was missing or went flying when I wrestled with the packaging trying not to break the tiny plastic mounts? Urrggg.

Last edited by Engineer-Joe
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10 are for switches, 10 are for accessories. Which did you use?

Possible you welded the contacts on the relay. Possible you wired in a seal-in circuit that is maintaining power to your switch motor. Neither are good.

Here's a wiring diagram that may help. Granted it is for a DZ1000 switch machine, but the concept is pretty much the same.

AIU

Since you're wiring a AIU, connect your switches separately. Then program them as a route if you want them to operate together.

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  • AIU
Last edited by Gilly@N&W

Thanks Tom. In my head, that's how I wired them. I believe the problem might be the power source. I did not identify the common. It's a small old wallwart power supply that had no markings on the output. I may try a Z4000 tap to test or even a DC supply.

 I will test to see if the AIU switch #1 is stuck on, on one setting of the switch. Of course a wire (or two) might not be right. I thought about it last night and could only believe that a wire must be wrong for only one switch to be buzzing. Maybe not?

I have some Atlas 3 rail switch machine parts, but I was thinking the 2 rail switch machines are different? I really don't know for sure, never seen an Atlas 2 rail switch in the flesh.

I have extra screws that are probably the same, I would guess anyway, and a couple of old 3 rail switch machines not up to par and just sitting around here somewhere for parts use. Let me know if you need something and I will look. Pictures might help, I'll try to find a pic of the 2 rail machines to see if different.

They look similar, but have different part numbers 2 rail - #7098 and 3 rail - 6099. Maybe some parts will interchange?

Last edited by rtr12

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