Dayton lamp modules and contact blocks are pilot device accessories that signal when the machine's process has started or stopped to keep users & equipment safe. These combined units consist of a contact block that encloses the contacts which in turn helps to "make or break" the electric circuit. They also have a lamp module that activates / deactivates the LED lamp when it receives appropriate signals. All units are Nema rated (1, 2, 3, 4, 4X, 12 and 13) for protection against ingress of foreign contaminants. They come integrated with screw terminal type connection for ease in installation and are available in red, white, green and yellow colour lamp variants.