Thanks, arduwino. However, the T90S1D12-5 belongs to the T90 series, and there is no T90S1D22. The T9AS1D12 and T9AS1D22-5-ND are from the T9A series. I asked about the T90S1D12-5, because the T9AS1D22-5-ND has quick connect terminals for contacts. What are quick connect terminals for contacts? If I buy the T9AS1D22-5-ND, can I safely ignore them (and grind my teeth for buying something I don't need)?