Limit switch for military, railway and air applications
  • Limit switch for military, railway and air applications

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Виробник: Honeywell

Limit switch for military, railway and air applications

Limit switch for military, railway and air applications


Description


The Honeywell MICRO SWITCH™ Series of EN limit switches are bushing mount designed, manufactured, and qualified to MIL-PRF-8805 standards. These products provide a durable switch for commercial and military aircraft as well as commercial and military ground-based equipment. Other applications include off-road equipment where severe environments are encountered.
The EN Series of switches have proven to deliver consistent and reliable operation in harsh environments on critical applications for more than 65 years.


EN limit switches features

  • Circuitry options from 1PST (one-pole single throw) circuit to 6PDT (six-pole double throw) circuits for position indication of different independent circuits or providing redundant circuit capabilities;
  • Rugged stainless steel housing and bushing;
  • All-metal drive train for consistent operating characteristics at high or low temperatures;
  • Most EN catalog listings are MIL-PRF-8805 compliant for stringent military and non-military applications;
  • MIL-PRF-8805 symbol 4 (resilient) sealing to keep dust, water, and ice from entering the switch enclosure;
  • Gold-bifurcated, gold-plated, or silver-alloy switch contacts for reliably controlling electrical loads from less than 0.5 A [low energy/logic level] up to 15 A (power duty);
  • Wide temperature range from -54 °C to 125 °C [-65 °F to 257 °F] for sea level or high altitude military or commercial applications;
  • Miniature package size [400EN Series and 600EN Series] reduces housing diameter by 30 % for smaller space required on equipment.

Examples of applications

  • Landing gear systems for commercial and military aircraft including helicopters;
  • External doors and hatches for commercial and military aircraft including helicopters;
  • Military ground vehicles;
  • Off-road construction equipment;

Tecjnical data

Characteristics Parameter
Description Environmentally sealed military qualified limit switch series (MIL-PRF-8805)
Housing and bushing material 300 Series stainless steel
Contact material Silver alloy, gold plated, gold bifurcated
Mechanical endurance 25.000 cycles/min
Electrical endurance 25.000 cycles/min @ rated load
Circuitry 1PST (one-pole single throw) to 6PDT (six-pole double throw)
Electrical rating Up to 15 A @ 28 V DC
Dielectric strength (initial) 1000 V RMS; 500 μA max. leakage
Insulation resistance (initial) 500 V DS; 1000 MΩ/min
Environmental sealing Symbol 4, resilient seal per MIL-PRF-8805
Operating temperature range -54 °C up to 125 °C (-65 °F up to 257 °F)
Shock Symbol M (100 g) per MIL-PRF-8805
Vibration Symbol 1 (10 g peak), 10 - 500 Hz
Standards Design conforms to MIL-PRF-8805

Example of switch design


Diagram

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Limit switch for military, railway and air applications


Description


The Honeywell MICRO SWITCH™ Series of EN limit switches are bushing mount designed, manufactured, and qualified to MIL-PRF-8805 standards. These products provide a durable switch for commercial and military aircraft as well as commercial and military ground-based equipment. Other applications include off-road equipment where severe environments are encountered.
The EN Series of switches have proven to deliver consistent and reliable operation in harsh environments on critical applications for more than 65 years.


EN limit switches features

  • Circuitry options from 1PST (one-pole single throw) circuit to 6PDT (six-pole double throw) circuits for position indication of different independent circuits or providing redundant circuit capabilities;
  • Rugged stainless steel housing and bushing;
  • All-metal drive train for consistent operating characteristics at high or low temperatures;
  • Most EN catalog listings are MIL-PRF-8805 compliant for stringent military and non-military applications;
  • MIL-PRF-8805 symbol 4 (resilient) sealing to keep dust, water, and ice from entering the switch enclosure;
  • Gold-bifurcated, gold-plated, or silver-alloy switch contacts for reliably controlling electrical loads from less than 0.5 A [low energy/logic level] up to 15 A (power duty);
  • Wide temperature range from -54 °C to 125 °C [-65 °F to 257 °F] for sea level or high altitude military or commercial applications;
  • Miniature package size [400EN Series and 600EN Series] reduces housing diameter by 30 % for smaller space required on equipment.

Examples of applications

  • Landing gear systems for commercial and military aircraft including helicopters;
  • External doors and hatches for commercial and military aircraft including helicopters;
  • Military ground vehicles;
  • Off-road construction equipment;

Tecjnical data

Characteristics Parameter
Description Environmentally sealed military qualified limit switch series (MIL-PRF-8805)
Housing and bushing material 300 Series stainless steel
Contact material Silver alloy, gold plated, gold bifurcated
Mechanical endurance 25.000 cycles/min
Electrical endurance 25.000 cycles/min @ rated load
Circuitry 1PST (one-pole single throw) to 6PDT (six-pole double throw)
Electrical rating Up to 15 A @ 28 V DC
Dielectric strength (initial) 1000 V RMS; 500 μA max. leakage
Insulation resistance (initial) 500 V DS; 1000 MΩ/min
Environmental sealing Symbol 4, resilient seal per MIL-PRF-8805
Operating temperature range -54 °C up to 125 °C (-65 °F up to 257 °F)
Shock Symbol M (100 g) per MIL-PRF-8805
Vibration Symbol 1 (10 g peak), 10 - 500 Hz
Standards Design conforms to MIL-PRF-8805

Example of switch design


Diagram

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