MIL-S-24798

Abstract

This specification covers the performance requirements and characteristics for fiber optic position switches (proximity or limit). This specification does not include switches which transfer an optical signal from one path to another by an external force or energy applied to the switch (see <a>6.1</a>). <br>The sensor classification shall consist of a series of designations which shall be assigned and listed in the format below. </span><pre>24798 - X - X - X Specification - Type - Opto-electronics - Electrical (see <a>1.2.1.1</a>) module power supply (see <a>1.2.1.2</a>) (see <a>1.2.1.3</a>)</pre> <br> <br> <pre> Type I: Proximity Position Switch Sensor Head Type II: Pin Actuated Limit Position Switch Sensor Head Type III: Lever Actuated Limit Position Switch Sensor Head Type IV: Lever and Roller Limit Position Switch Sensor Head Type V: Tether Valve Limit Position Switch Sensor Head</pre> <br> <strong>Beneficial comments (recommendations, aditions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 03R42, 2531 Jefferson Davis Hwy., Arlington, VA 22242-5160, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</strong> <br>A - Bulkhead Mount (see <a>3.4.2.1</a>) <br>B - Control Enclosure Mount (see <a>3.4.2.2</a>) <br>C - Console Mount (Microprocessor expansion card) (see <a>3.4.2.3</a>) <br>The optical and electrical interface wiring shall be determined by the power supply as follows. <pre> AC - Four wire system used with a 115 Volt (nominal) alternating current (ac) supply. DC -Four wire system used with a 28 Volt (nominal) direct current (dc) supply.</pre> <br> <br><b><u>Intended Use:</u></b> Fiber optic proximity position switches are intended to be used in elevator motor controller systems, or other applications where a noncontact position measurement method is desired. Fiber optic limit position switches are intended for use as safety interlocks in a motor controller, as darken ship switches, as a contact type position indicator for an elevator control system, or other applications where a mechanical contact position measurement method is desired. The fiber optic switches are intended to be lightweight and inexpensive. The opto-electronics module may be either a stand alone unit, or an expansion card for a microprocessor based control system. <br>