HONEYWELL 51196895-100 Power supply

Product Detailed Description

• Functionality:

• Position Sensing: Used to determine if a moving machine part has reached a specific position.

• Presence/Absence Detection: Confirms if an object is present or absent in a defined area.

• End-of-Travel Sensing: Signals when a movable component has reached its mechanical limit.

• Safety Interlocking: Critical for machine safety applications, ensuring that certain operations can only occur when protective guards are closed or specific conditions are met.

• Counting and Sorting: Can be used in conjunction with other components for counting parts or sorting based on position.

• Operating Principle:

• Most Honeywell limit switches employ a precision snap-action mechanism. When the actuator is moved a predetermined distance by the target object, the internal contacts rapidly change state (open or close), providing a crisp, repeatable signal.

• Some models may offer slow-action contacts for specific applications.

• Construction and Features:

• Roller Levers: Side rotary, adjustable, or fixed. Ideal for cam-operated or sliding applications.

• Plungers: Top plunger, side plunger, roller plunger. For direct linear actuation.

• Wobble Sticks/Coil Springs: Flexible actuators for multi-directional sensing or where precise alignment is difficult.

• Rod Levers: Long, thin rods for sensing objects at a distance.

• Actuators: Available in a vast array of styles to suit different mechanical movements:

• Housing Materials: Typically rugged die-cast metal (zinc epoxy-coated) for heavy-duty applications, or thermoplastic for lighter-duty or double-insulated requirements.

• Sealing: Designed for harsh environments, often featuring high IP (Ingress Protection) ratings (e.g., IP65, IP66, IP67) and NEMA ratings (e.g., NEMA 1, 3, 4, 4X, 6, 6P, 12, 13) for protection against dust, water spray, coolant, and even immersion.

• Electrical Circuitry: Common configurations include SPDT (Single Pole Double Throw - 1 NO + 1 NC), DPST (Double Pole Single Throw), and 2 NO + 2 NC options. Many feature "positive opening" (direct acting) normally closed contacts for enhanced safety, ensuring the contacts physically separate even if they are welded together.

• Terminations: Options include conduit entries (NPT, PG, M20), pre-leaded cables, or quick-disconnect connectors (mini-connector, micro-connector).

• Modularity: Many series (e.g., HDLS, GLS) offer modular construction, allowing users to select different heads, bodies, and electrical circuitry, simplifying customization and maintenance.

Product Parameters (Typical Ranges across different series)

• Actuator Types: Side Rotary, Top Plunger, Side Plunger, Roller Lever, Rod, Wobble Stick, Coil Spring, Forked Lever, etc.

• Housing Materials: Zinc Die-Cast, Thermoplastic, Stainless Steel.

• Contact Configurations: 1NO/1NC SPDT, 2NO/2NC, 2NC DPST, 3NO/3NC, 4NO/4NC (depending on series).

• Rated Operational Voltage (Ue): Up to 600 VAC, 250 VDC.

• Rated Operational Current (Ie): Typically 1A to 15A (thermal current can be higher).

• Mechanical Life: Ranges from 1 million to 15 million operations, depending on the series and actuator.

• Electrical Life: Ranges from 100,000 to 500,000 operations.

• Operating Force: Varies widely depending on actuator type (e.g., few grams for sensitive switches to several pounds for heavy-duty).

• Pretravel / Overtravel / Differential Travel: Specific to actuator type and precision.

• Operating Temperature Range: Common ranges are -25°C to +85°C (-13°F to 185°F), with some heavy-duty versions extending from -40°C to +121°C (-40°F to 250°F).

• Degree of Protection (Sealing): IP65, IP66, IP67, and various NEMA ratings (e.g., 1, 3, 4, 4X, 6, 6P, 12, 13).

• Mounting: Various standard mounting hole patterns (e.g., 25mm, 30x60mm, EN50041).

• Certifications: UL, CSA, CE, CCC, ATEX, IECEx (for hazardous area models), UKCA.

Product Advantages

• Exceptional Reliability and Durability: Built to withstand demanding industrial conditions, including shock, vibration, temperature extremes, and contaminants. Many models feature all-metal drive trains for consistent operation and extended life.

• Wide Range of Actuators: A vast selection of actuator styles allows for precise sensing in almost any mechanical application, offering high design flexibility.

• High Sealing Ratings: Robust sealing options (IP65/66/67, NEMA ratings) ensure performance in wet, dusty, or corrosive environments.

• Safety Compliance: Many models feature positive opening (direct acting) normally closed contacts, which are essential for machine safety applications and compliance with standards like IEC 60947-5-1 and EN ISO 13849-1.

• Global Acceptance: Global series (e.g., GLS) meet international standards, simplifying use in machines destined for worldwide markets.

• Versatile Electrical Options: Multiple contact configurations, current ratings, and termination types provide flexibility for various control circuits.

• Easy Troubleshooting: Snap-action contacts often provide an audible click, and electrical operation can be easily monitored, aiding in troubleshooting.

• Cost-Effective: A proven and straightforward technology that offers reliable sensing solutions at a competitive cost.

Precautions

• Correct Selection: Carefully choose the limit switch based on:

• Application Environment: Temperature, humidity, presence of dust, water, or corrosive agents (select appropriate IP/NEMA rating).

• Actuation Type: Match the actuator to the mechanical movement of the target object (e.g., linear, rotary, cam).

• Electrical Requirements: Ensure voltage, current, and contact configuration meet circuit needs. For low-voltage/low-current electronic circuits, consider gold-plated contacts to prevent contact resistance issues.

• Safety Standards: For safety applications, select switches with positive opening (direct acting) NC contacts and ensure compliance with relevant safety standards (e.g., EN ISO 13849-1, IEC 60947-5-1).

• Proper Installation:

• Mount the switch securely to a rigid surface to prevent vibration or misalignment.

• Ensure the actuator is properly aligned with the target object and that it does not exceed the specified overtravel (OT) range, as excessive overtravel can damage the switch.

• Consider the operating speed and angle of the actuating object ("dog") for optimal performance and lifespan.

• Wiring:

• Follow the wiring diagrams provided in the product manual.

• Ensure proper conductor sizing and insulation.

• Secure cable connections to prevent loosening due to vibration.

• Always de-energize circuits before wiring or maintenance.

• Environmental Considerations:

• Avoid storing or operating switches in locations with corrosive gases (e.g., H2S, SO2), excessive dirt/dust, or extreme temperatures/humidity outside specified limits.

• Maintenance:

• Perform periodic inspections of the switch's mechanical operation, actuator wear, and electrical connections.

• Ensure seals (e.g., cover gaskets) are properly seated to maintain environmental protection.

• Avoid Misuse: Do not use the switch beyond its rated electrical or mechanical limits. Do not attempt to modify or disassemble the sealed head or body.

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