Siemens 7pu60 20-3nn2 Time Delay Relay

Siemens 7PU60 20-3NN2 Time Delay Relay is a dual-range timing device used to stage control circuits, typically for motor start sequencing in star-delta configurations. It provides two adjustable delay windows: 2–20 seconds and 6–60 seconds, enabling either short or longer startup delays to suit different loads and switching schemes. The variant is commonly cataloged as 7PU60-20-3NN2, with some listings also referencing 7PU60-20-3NJ2, reflecting alternate catalog notation. This relay functions as a repeatable time-delay element that coordinates outputs in control panels, helping prevent abrupt relays or contactors from energizing too quickly and aiding smooth, orderly sequencing in automation applications.