Series 71
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Mechanical Encoders SERIES 71 Binary Code FEATURES • 1/4" or 1/s" Shaft Diameters • 25,000 Cycles at 125 mA • Optional Seal Versions • Adjustable Stop Versions DIMENSIONS in inches (and millimeters) Rear mounting plate stamping indicates CODED output terminals, not decimal positions. Optical and Mechanical Encoders BUSHING KEYWAY .066 ± .002 (1,68 ± 0,05) WIDE BY .036 ± .003 (0,91 ± 0,08) FROM A .375 (9,53) DIAMETER Grayhill part number and date code marked on label. Customer part number marked on request. Output Terminal • Indicates contact is made to the common. Shaft Diameter And Description CODE And TRuTH Table SPECIFICATIONS Electrical rating rated: To make and break 125 mA at 30 Vdc resistive at standard conditions Life Expectancy: 25,000 cycles at rated load; 50,000 cycles mechanical. For ratings at different loads and conditions, contact Grayhill. Contact resistance: 100 milliohms maximum (50 milliohms initially) Insulation resistance: As measured between mutually insulated parts Initially: 50,000 megohms minimum After Life: 10,000 megohms minimum Voltage Breakdown: 500 Vac between mutually insulated parts Carry Current: These switches will carry 3 amperes with a maximum contact temperature rise of 20°C. OPTIONS Shaft and Panel Seal Shaft is sealed by o-ring inside the bushing; panel is sealed by o-ring at the base of the bushing. Seals do not alter dimensions as shown in the drawing when switch is mounted. Panel seal is silicone rubber. Shaft seal is an o-ring per MIL-P-5516B. Shaft and panel seal is not available on adjustable stop switch. Additional Characteristics rotational Torque: 8 to 16 oz-in. Contacts: Non-shorting wiping contacts Shaft flat Orientation: As shown in the drawing, switch would provide a decimal 1 output. Materials and finishes Base: Diallyl per MIL-M-14 rotor Mounting Plate: Thermoplastic. rotor Contact: Phosphor Bronze, gold-plated 30 microinches minimum Terminals: Brass, gold plate (20 microinches min) over silver plate (300 microinches min) Additional Materials: Other switch materials and finishes are the same as listed for the standard switch. Adjustable Stop Switches Adjustable stop switch lets you limit the number of positions. Remove and relocate pins in the front plate. A sticker holds the pins in place. With the exception of holes in the front plate, all dimensions, ratings, and characteristics are the same as the other Series 71 coded switches. For diagrams, see Standard Switch. Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill. Grayhill, Inc. • 561 Hillgnove Avenue • LaGrange, Illinois 6052 5-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 •