The ABB 2TLA020007R3000 JSTD1-A is a Safeball JSTD1 momentary pushbutton switch with SPDT contacts and IP67 ingress protection.
IP67 means the switch body and actuator seal against dust ingress and temporary immersion — it holds up on washdown zones or outdoor conveyor lines where a standard pushbutton would wick moisture into the contacts. SPDT (single-pole double-throw) gives you a normally-open and normally-closed contact pair in one package, so you can wire a safety input and a status feedback signal off the same button without an extra relay.