I watched the following video of a gentleman who created a control box for his dust collector that has micro switches at each blast gate and when a gate is opened, the collector turns on and when closed, it turns off. The control box contains a Solid State relay SSR-40 DA and the control power is from an AC/DC power supply through micro switches. I'm probably not going to describe it well if I continue, so I'll get to my situation.
https://www.youtube.com/watch?v=iqJ1gggJfO4
In the video, his setup is for 120V to the DC, and in the comments he describes that for a 220v circuit, 2 relays can be used, one for each leg of the 220V. After watching the video his set up makes sense, and I've drawn up a diagram for my plans to wire it up for 220V.
He also comments that you can likely use a 2 pole relay, but I believe the pricing goes way up (using two SSD-40 DA relays is approx $30 for the pair vs well over $100 for a 2 pole relay.)
I'd appreciate anyone with experience in electrical work please have a look at my diagram and let me know if I'm on the right track or should I throw in the towel.
Also two initial questions
1. Re Thermal Protection. The motor doesn't have it separately and this option doesn't have it built in. Should I consider that here.?
2. If I use two separate relays as I've shown, if one relay fails, and the other is still good, and the system tries to start up, is there any danger there?
Thanks to any and all feedback - especially the constructive kind.

https://www.youtube.com/watch?v=iqJ1gggJfO4
In the video, his setup is for 120V to the DC, and in the comments he describes that for a 220v circuit, 2 relays can be used, one for each leg of the 220V. After watching the video his set up makes sense, and I've drawn up a diagram for my plans to wire it up for 220V.
He also comments that you can likely use a 2 pole relay, but I believe the pricing goes way up (using two SSD-40 DA relays is approx $30 for the pair vs well over $100 for a 2 pole relay.)
I'd appreciate anyone with experience in electrical work please have a look at my diagram and let me know if I'm on the right track or should I throw in the towel.
Also two initial questions
1. Re Thermal Protection. The motor doesn't have it separately and this option doesn't have it built in. Should I consider that here.?
2. If I use two separate relays as I've shown, if one relay fails, and the other is still good, and the system tries to start up, is there any danger there?
Thanks to any and all feedback - especially the constructive kind.
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