The 800T-XD1 from Allen-Bradley is a contact block that does not have a guard. A base mount is required for this module. Normally, the enclosure is open. A nonmetallic material is used to make this contract block. Additionally, this module needs a voltage of 600 volts AC to function properly. This contact block is intended for use with push buttons from the 800T and 800H series that measure 30 mm in diameter. Die-cast aluminum, alloy steels, glass, and thermoplastic polyester resin construction are all options for many of the 30 mm constructed switching devices. The 800T-XD1 from Bulletin 800T selection switches provide a high degree of adaptability when it comes to addressing the demands of specific circuits. Also, the Bulletin 800T series contact block selector switches are manufactured with twin actuators behind such rotary cam switching devices that function independently to enable a variety of contact sequences. Bulletin 800T sequences selector type switches are available in three sizes. According to the actuation sequence wanted, contact blocks may be placed one after the other or side-by-side to get the desired result. This module is intended to be installed on a flat surface and is supplied with a screw attachment. Moreover, this shallow block includes a choice of single and double circuit contact modules, and also a direct drive, bifurcated spanner, in a number of sizes. Switches with a diameter of 5mm and mounting screws are supplied. There are three versions of the 800T-X part: one (1) normally open (N.O.) & one (1) normally closed (N.C.) configuration (800T-XA), one (1) normally open (N.O.) configuration (800T-XD1), and one (1) normally closed (N.C.) configuration (800T-XD2).