Hermetically Sealed, High Temperature Limit Switches 003127 HR Series Issue 1 Datasheet FEATURES Exceptional wide temperature range of -65 C to 315 C -85 F to 600 F Select HR Series catalog listings are qualified or compliant to MIL-PRF-8805 Hermetically sealed to MIL-PRF-8805 symbol 5 Stainless steel housing and threaded bushing Different styles of integral actuators: pin plungers and roller plungers Several different styles of electrical termination: 4-48 terminal screws, end or side exit 20 AWG wire leads POTENTIAL APPLICATIONS Thrust reverser actuation system (TRAS) for jet engines DESCRIPTION Cowl-lock indication during thrust reverse actuation for jet When the application requires a hermetically sealed switch engines with high temperature capability, Honeywell delivers the HR Series limit switches for the most severe of environments. The DIFFERENTIATION HR Series is well suited for commercial and military aircraft Only manufacturer with a bushing mount high-temperature applications where high temperatures are encountered. The hermetically sealed limit switch switch design incorporates a choice of an integral pin plunger Threaded bushing facilitates ease of installation or roller plunger with a 3/4 inch diameter threaded bushing for ease of installation into a panel. With stainless steel material PORTFOLIO construction for the external package and high temperature In addition to the HR Series hermetically sealed switches, rated components, the HR Series switches are capable of Honeywell offers a complete range of sealed switches for aircraft withstanding continuous temperatures up to 315 C 600 F and and military systems. The sealed switches include the EN Series, suitable where corrosive environments are present. HM Series, HE Series, HS Series, SE Series, and XE Series. HR Series limit switches are designed to MIL-PRF-8805 standards with select catalog listings qualified to the MIL-PRF-8805 standards. VALUE TO CUSTOMERS Honeywell HR Series hermetically sealed high-temperature switches drive solutions for precise position indication of critical applications on commercial/military aircraft and military systems Sensing and Productivity SolutionsHermetically Sealed, High Temperature Limit Switches, HR Series Table 1. Specifications Characteristic Parameter Description High temperature hermetically sealed limit switch with MIL-PRF-8805 standards Standards Design conforms to MIL-PRF-8805 Housing & bushing material 300 Series stainless steel Contacts Silver alloy Circuitry 1PDT or 2PDT reference circuitry illustrations below Electrical rating 5 A resistive or 2 A inductive 28 Vdc Mechanical endurance 25000 cycles min. Electrical endurance 25000 cycles min. at full rated load Dielectric strength (initial) 1000 VRMS 500 A. Max. leakage Insulation resistance (initial) 500 Vdc 1000 Megohms min. Environmental sealing Symbol 5, hermetic seal per MIL-PRF-8805 Temperature range -65 C to 315 C -85 F to 600 F Shock Symbol M (100 g) per MIL-PRF-8805 Vibration Symbol 1 (10 g peak) 10 Hz to 500 Hz sinusoidal per MIL-PRF-8805 TYPICAL CIRCUITRY 1PDT 2PDT 2PDT with connector HR SERIES SWITCHES The HR Series high-temperature hermetically sealed switches are designed with a threaded bushing for panel mount applications. The HR Series has a threaded bushing which is 0.75 (3/4) in diameter. The options for the electrical termination for the HR Series switches are generally end exit wire leads or screw terminals integral to the switch however, military style connectors integral to A FB the HR switch are also available. EC D MOUNTING Plunger actuator switches bushing mount through 0.75 inch (19,1 mm) diameter holes. Lock washer, keying washer, and wire lock hexagon mounting nuts lock the switches in their mounting. ACTUATORS Plunger For in-line actuation. An ice scraper ring clears the actuator with each operation. Material is stainless steel. Roller plunger For cam and slide actuation not to exceed 20 rise. Roller adjusts laterally in 45 increments. An ice scraper ring cleans the actuator with each operation. Material is stainless steel. 2 sensing.honeywell.com