The ABB 2TLA050220R1422 is an emergency stop push button station from the Smile series, with 4 poles configured as 2 normally open and 2 normally closed contacts. The stainless steel construction and NEMA 4X rating mean it holds up to washdown environments and corrosive atmospheres — a fit for food processing, chemical plants, or outdoor installations where a plastic enclosure would degrade. Surface-mount housing with NPT entrance simplifies panel glanding.
The 4-pole contact block gives you two independent NC safety channels plus two NO signal contacts — enough to wire a dual-channel safety circuit to a monitoring relay or safety PLC while also feeding a status lamp or DCS input. The NEMA 4X rating (equivalent to IP66) seals against hose-directed water and corrosion, so it can sit on the machine frame in a washdown zone without a secondary enclosure.