The 5210 Series of heavy-duty palm button assemblies provide conspicuous, door release for electric door locks. These, easy to operate, Request-To-Exit controls are ideal for use in hospitals, industrial complexes, office buildings and institutions. These push button switches are furnished with standard 1-9/16" diameter caps. The 5216 Push Button Switches are supplied with a large 2-3/8" diameter cap to meet code requirements for some localities. The caps can be supplied in colors other than red as may be needed for electrically locked exit doors. In addition, 5210 Push Button Assemblies can be furnished with illuminated button caps and Narrow 1-3/4", Single or Double gang Stainless Steel back plates. Dual contact blocks, one normally open and one normally closed set are furnished standard. This allows the magnetic lock power to be cut by the normally closed contacts upon switch activation while simultaneously signaling an access control panel with the normally open contact block. The P23DA Pneumatic Time Delay version operates the same. Since both sets of contacts are electrically isolated from each other, there are no problems with voltage compatibility. All 5210 Series switch assemblies are available with one or more Bi-Color LEDs. These indicators can be wired to give a red, amber or green illumination. When LEDs are utilized with door position switches and magnetic bond sensors, the security condition of the door can be indicated. The stainless-steel switch plates can be Screen printed with epoxy paint or engraved with standard or custom wording. Block style lettering is typically 1/4" tall. Text is red to enhance readability.