No-one likes the high cost of Siemens contactors. Personally I think they are a better solution than solenoids for DOF.
I just received 8 used 3RT1016-1BB41 24 VDC contactors from an e-bay source in the USA - $8 each including shipping. They work and I cleaned them up a bit so they look almost new. Currently there are more than 10 available.
Mike Pinball
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