ZBVB4 is a 22 mm Harmony XB4 light block with an integrated red LED, designed to accompany Ø22 push‑button heads in the Harmony XB4/XB5 family. It operates from 24 V AC or DC and is typically sold in five‑unit lots, making it easy to equip multi‑button assemblies. This light block provides a built‑in indicator for signaling on industrial control panels and pairs with compatible XB4 heads to form illuminated push‑button assemblies.
