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Dil Kodu: en7tayfun Magnat Audio Brand's Products
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Elektronik Bilgi Kütüphanesi
Anasayfa > Brands > Magnat Audio > Printer > Keypads 88 Series
44444
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Standard Keypads
Keyboards and Keypads
SPECIFICATIONS
Rating Criteria
Rating at 24 Vdc:10milliamps,resistive
Contact Resistance: Compatible with MOS,
TTLandDTL(10ohmsmaximum)
Voltage Breakdown:250Vacbetweenmutually
insulatedparts
Life Expectancy:3,000,000operationsper
button
Contact Bounce:Lessthan4millisecondsat
make,10millisecondsatbreak
Temperature: -40°Cto+80°C
Operating Features
Button Travel:0.015"(0,38mm)nominaltotal
travel
Typical Operating Force:350grams
Materials and Finishes
Housing:ABSpolycarbonate,black
Graphic Overlay:Polyester
Contact Dome: Stainless steel, selectively
gold-plated
Terminals:Phosphorbronze
SEALING OF KEYBOARDS
The graphic legend is silk-screen printed
on the second surface of a clear polyester
lm, providing maximum legend protection.
Itwithstandshighhumidity,anditisresistant
to scratching, marring, and dulling of the
surfacecausedbyngernails,wipingcloths,
andcleaningmaterials.Ithasexcellentsolvent
resistance to water, petroleum oil, alcohols
andaliphatichydrocarbons.
These common liquids do not attack the
overlay: 5% acetic acid,5% citric acid, 2%
detergentsolution,soapywater,30%hydrogen
peroxide,wine,beer,whiskey,coffee,cocoa,milk,
tomato juice, lemon juice, etc. Hydrocarbons,
ketones and freon do not affect the overlay.
But,werecommendthatyoudonotsubjectthe
keyboard to these chemicals, since they may
affecttheswitchhousing,whichisABSplastic.To
discussaparticularsolvent,contactGrayhill.
Protect your equipment in outdoor or harsh
environmentalconditionsbysealingthekeyboard
totheequipmentpanel.Useanoptionalgasket
with the keyboard. There are two types of
gaskets:oneformountingthekeyboardbeneath
thepanel,andoneformountingitabovethe
equipmentpanel.SeePanelSealGaskets.
Thecontactsystemisinternallysealedbya
specialadhesivebackedsheetthatholdsthe
domesinpositiononthePCboard.
STANDARD LEGENDS
Colorful graphic overlays are polyester with
a tough acrylic bond to provide maximum
protectionagainstdirtandmoisture.Second
surfaceprinted,the overlaywipescleanand
continues to look bright and bold throughout
thekeyboardlife.Availablethroughdistributors.
For instant custom legends, order separate
blank keyboards as indicated in the Ordering
-252 -262
88-201
88JB2, 88JC2
-143 -152 -172
Information section and choose one of the
clear window overlays below; then order a
sheetoflegendinserts.Or,ifyouprefer,order
thekeyboardcustomprintedbyGrayhill;see
OrderingInformation.
88-101
88AB2,
88AC2
88-001
88BB2,
88BC2
-052 -072 -082