Allen Bradley 800T-XD1 Shallow Contact Block Series D (LZ21S)
People often choose Allen-Bradley because their processors handle heavy workloads without fuss.
Allen Bradley, 800T-XD2, Contact Block Shallow Block Push Button Switch
Many shops stick with Allen-Bradley because their support network is very helpful.
Square D 800 TC XA4 Contact Shallow Block, 2 N.C. Red (New In Box)
With the IM12-04NPS-ZW1, you get a straightforward module that does its job.