E50KL355

Limit Switches 2.0 Introduction E47 Precision Switch 2 Technical Reference . V8-T2-2 Product Selection Guide . V8-T2-3 2 2.1 E47 Precision Switches 2 Product Description . V8-T2-6 Product Selection . V8-T2-7 2 2.2 Compact Prewired Switches 2 Product Description . V8-T2-15 Compact Prewired Switch Product Selection . V8-T2-16 2 2.3 LS-Titan Miniature DIN Switches 2 Product Description . V8-T2-21 Product Selection . V8-T2-23 2 2.4 E49 Mini Metal Switches 2 Product Description . V8-T2-43 Product Selection . V8-T2-44 2 2.5 E49 Compact Metal Switches LS-Titan Miniature DIN Switch 2 Product Description . V8-T2-49 Product Selection . V8-T2-50 2 2.6 E50 Heavy-Duty Plug-In Switches 2 Product Description . V8-T2-54 Product Selection . V8-T2-55 2 2.7 E50 Heavy-Duty Factory Sealed 6P+ Switches 2 Product Description . V8-T2-68 Product Selection . V8-T2-69 2 E49 Compact Metal Switch 2.8 Operators 2 Product Description . V8-T2-80 Product Selection . V8-T2-81 2 2.9 Non Plug-In Switches 2 Product Description . V8-T2-89 Product Selection . V8-T2-90 2 2.10 Hazardous Location Limit Switches 2 Product Description . V8-T2-92 Product Selection . V8-T2-93 Heavy-Duty Factory Sealed 2 6P+ Switch 2.11 Special Purpose Limit Switches 2 Product Description . V8-T2-96 Product Selection . V8-T2-97 2 Unless otherwise noted, the products contained in this section should not 2 be used for functional safety applications. These products were not designed or tested to IEC 60947-5-3 or recommended for functional safety. 2 Learn 2 Online 2 For Customer Service in the U.S. call 1-877-ETN CARE (386-2273), 2 in Canada call 1-800-268-3578. For Application Assistance in the U.S. and Canada 2 call 1-800-426-9184. Volume 8Sensing Solutions CA08100010EFebruary 2013 www.eaton.com V8-T2-1Limit Switches 2.0 Introduction Technical Reference 2 Limit Switches 2 2 2 2 2 2 2 2 2 Mechanical Limit Switches Limit Switches offer high Limit switches contain the 2 are contact sensors widely precision in terms of accuracy following major components. used for detecting the and repeatability. This is These may be modular or part 2 presence or position of primarily due to the fact that of a single-piece switch. objects in industrial they make direct contact applications. with the target. When an 2 Limit Switch Components object contacts the limit switch lever (or plunger) Actuator/ 2 Switch Operating the lever moves a pre-travel Body Head distance to the operating Actuator/ 2 Operating point where the contacts are Head tripped. Movement of the lever beyond this point is 2 called the over-travel. Lever Type Actuator 2 Pre-travel 2 Operating Initial Position Point Over-travel 2 2 Receptacle/ Reset Point Terminals 2 Switch Body 2 Differential Actuator Terminals 2 This is the part of the switch The terminals are the point of that contacts the target. connection for the wiring. 2 Typical actuators are levers These terminals may be on Initial Position and plungers. Several styles the body itself, or housed in a 2 Pre-travel are available, see Sensor removable receptacle. The Reset Point Differential Learning Course, Page limit switch may also come Operating Point 2 Over-travel V8-T12-4, for more equipped with a factory Final Position information. installed cable or pin- connector. 2 Switch Body This part contains the 2 electrical contact mechanism. Refer to Sensor Learning Course, Page V8-T12-4, for a For complete information on complete description of limit switch terminology. 2 electrical outputs, see Sensor Learning Course, Page 2 V8-T12-4. V8-T2-2 Volume 8Sensing Solutions CA08100010EFebruary 2013 www.eaton.com