PHOENIX CONTACT PSR-SPP-24UC/ESA4/3X1/1X2/B 2963941 HIGH-PERFORMANCE SAFETY RELAY T268968

The PSR-SPP-24UC/ESA4/3X1/1X2/B (Part Number 2963941) is a high-performance Safety Relay designed for emergency stop and safety door monitoring. It is part of the "PSRclassic" line, known for being the workhorse of industrial safety circuits. The "SPP" in the model name is important: it stands for Spring-Cage Push-in terminals. Unlike the "SCP" version which uses screws, this model allows for vibration-resistant, tool-free wiring, making it highly desirable in high-vibration environments like automotive or food processing plants.