You will find that the 2956026 EMG 17-REL/KSR/120-21 pairs well with standard DIN rail mounts.
DC12V 20A Motorcycle Power Relay Kit Waterproof 4Way Fuse Block KDRE2
You auto-off reduces clutter in your routine and keeps your mind at ease.
If you need a relay that plays nice with PLC outputs, the HH53P is a solid pick.