The Veris VTD Series are multi‑function time delay relays equipped with an external control switch input and designed for easy socket/DIN mounting.The VTD2P‑F50 includes five functions shown at left,while the VTD1P‑UNI and VTD2P‑UNI include the same five as the VTD2P‑F50 plus five more,for the most versatile relay available. Save inventory costs by purchasing one relay for all the functions you need.