Help with Rotary Limit Switches specifications:
General Specifications
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Switch Type | |||
Your choices are... | |||
Electromechanical | Electromechanical switches have mechanical contacts, relays, or reeds. | ||
Solid State | Solid-state switches are electronic and do not have moving parts. Most use a normally-open circuit. | ||
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Contact Type | |||
Your choices are... | |||
Momentary Contact | Momentary contact means that the switch is open or closed only during actuation. Force is removed after actuation, and the switch reverts to its normal position. Sometimes, momentary contact is referred to as spring return. | ||
Maintained Contact | Maintained contact means that the switch contacts remain in the "triggered" position even after the actuator has been released. The contacts are reset only by further mechanical action of the operating head. | ||
Positive Opening | Positive opening means that the contact-point opens reliably and then remains open, in the activated position, even in the event of a mechanical failure (e.g., the breakage of a spring or contact weld). Positive opening is sometimes called positive breaking contacts. | ||
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Normal State | |||
Your choices are... | |||
Normally Open (NO) | Normally open (NO) means that the switch contacts, when in their open position, interrupt the circuit. When actuated, the contacts close. | ||
Normally Closed (NC) | Normally closed (NC) means that the switch contacts, when in their normally closed position, establish a circuit. When actuated, the contacts open. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Switch Configuration | |||
Your choices are... | |||
Single Pole, Single Throw (SPST) | Single pole, single throw (SPST) makes or breaks the connection of a single conductor in a single branch circuit. Typically, a SPST switch has two terminals and is called a single-pole switch. | ||
Single Pole, Double Throw (SPDT) | Single pole, double throw (SPDT) makes or breaks the connection of a single conductor with either of two other single conductors. Typically, a SPDT switch has three terminals and is called a three-way switch. | ||
Double Pole, Single Throw (DPST) | Double pole, single throw (DPST) makes or breaks the connection of two circuit conductors in a single branch circuit. Typically, a DPST switch has four terminals. | ||
Double Pole, Double Throw (DPDT) | Double pole, double throw (DPDT) makes or breaks the connection of two conductors to two separate circuits. Typically, a DPDT switch has six terminals and is available in both momentary and maintained contact versions. | ||
Other | Other unlisted poles and throws. | ||
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Actuator Type | |||
Your choices are... | |||
Standard Roller | The actuator is a standard roller. | ||
Offset Roller | The actuator is an offset roller. | ||
Adjustable Roller | The actuator is an adjustable roller. | ||
Fork Lever Roller | The actuator is a fork lever roller. | ||
Wide Roller | The actuator is a wide roller. | ||
Rod / Wire | The actuator is a rod or wire. | ||
Loop | The actuator is a loop. | ||
Wobble Type (Spring) | The actuator is a spring. | ||
Cam Type | The switch uses cam's to switch the output at preset degrees. | ||
Other Rotary Type | Other unlisted, specialized, or proprietary configurations. | ||
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Connection Options | There are numerous ways to connect a limit switch into an existing system, please contact manufacturer for more specifics, such as wire options (gauge), materials and coatings. | ||
Your choices are... | |||
Integral Cable | Electrical connections are made using an integrated cable. | ||
Solder Terminal | Terminals require soldering for a positive electrical connection. | ||
Screw Terminals | Terminals require the use of a screw or clamp for a positive electrical connection. | ||
Spade Terminals | Electrical connections are made using spade terminal lugs. | ||
Other | Other connection options. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Orientation | The orientation of the limit switch actuator is critical when determining sizing requirements. | ||
Your choices are... | |||
Top Mounted Actuator | The actuator is oriented on the top of the limit switch. | ||
Side Mounted Actuator | The actuator is oriented on the side of the limit switch. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Enclosed Switch Housing? | The switch is inside housing and accessed with a conduit. This housing may be NEMA rated. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
Performance
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Maximum Current Rating | The switch's maximum current rating. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Maximum AC Voltage Rating | The switch's maximum AC voltage rating. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Maximum DC Voltage Rating | The switch's maximum DC voltage rating. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Electrical Life (Minimum) | Electrical life is the number of cycles a switch can before withstand before possible electrical failure. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
TTL Compatible? | TTL compatible switches are designed for use in transistor-transistor logic (TTL) circuit. | ||
Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
Operating Temperature | The temperature range over which the device must operate. | ||
Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
Mechanical Specifications
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Pre-Travel | Pre-travel is the distance of the actuator's movement from the free or rest position to the operating position. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Total Travel | Total travel is the total physical movement (from rest to beyond actuation point) that can occur without damage. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Movement Differential | Movement differential is the required actuator movement between the operating point and the reset point. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Operating Force | Operating force is the force required to depress the switch actuator to the operating or trip position. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Minimum Return Force | Minimum return force is the amount of force applied to the switch actuator to return the switch to the inactivated position. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Repeatability | Repeatability refers to the ability of a switch to accurately repeat the performance for a given measurement. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Mechanical Life (Minimum) | Minimum mechanical life is the number of cycles a switch can withstand before possible mechanical failure. | ||
Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
Actuator Movement | |||
Your choices are... | |||
Clockwise | The actuator moves in a clockwise direction. | ||
Counterclockwise | The actuator moves in a counterclockwise direction. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Features and Approvals
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Certifications / Approvals | |||
Your choices are... | |||
CE Certification? | CE Marking indicates that a product complies with the essential requirements of relevant European Union (EU) directives that uphold national standards for health, safety and environmental protection. CE Marking is required in the countries of the European Economic Area (EEA), an organization that consists of the twenty five member states of the EU and the three members of the European Free Trade Association (EFTA). CE Marking refers to the safety of a product. It is not a quality standard. | ||
CSA Certification? | Products that bear a CSA Mark have been tested by the Canadian Standards Association (CSA) and meet applicable standards for safety and/or performance. These standards are written and administered by organizations such as the American National Standards Institute (ANSI), Underwriters Laboratories (UL), and CSA International. CSA Marks may appear alone or with indicators. CSA Marks that appear alone are used with products certified primarily for the Canadian market, to the applicable Canadian standards. CSA Marks that appear with the indicators “C” and “US” or “NRTL/C” is used with products certified for both the U.S. and Canadian markets, to the applicable U.S. and Canadian standards. | ||
UL listed? | The UL Listing Mark indicates that Underwriters Laboratories Inc. (UL) has determined that representative samples of the product meet UL's safety requirements. These requirements are primarily based on UL's own published Standards for Safety. The UL Listing Mark is seen commonly on appliances and computer equipment, furnaces and heaters, fuses, electrical panelboard, smoke and carbon monoxide detectors, fire extinguishers and sprinkler systems, personal flotation devices like life jackets and life preservers, bullet resistant glass, and thousands of other products. | ||
Other | Other unlisted certifications or approvals | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Features | |||
Your choices are... | |||
Self-Cleaning Switch Contacts? | Self-cleaning switch contacts include wiping contacts and other devices which do not permit a build-up of resistance. | ||
Rated for Hazardous Locations? | Switches are rated for hazardous locations. | ||
Safety Pull or Guard? | Limit switches with a safety pull or guard can be turned ON or OFF in emergency situations. | ||
Rotatable Head? | The actuator can be rotated to different positions. | ||
Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||