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
DIMENSIONS ininches(andmillimeters)
SERIES 88
Sealed, Flange Mounted
3x4 Keyboard
Termination ininches(andmillimeters)
3x4
Code and Truth Table
Dots in the chart indicate connected terminals
whenswitchisclosed.Terminalsareidentiedon
thekeyboard.
3.000
±.015
(76,2
±0,38)
2.800
±.010
(71,12
±0,25)
.200±.010
(5,08±0,25)
ABCFGHLMN
2.200±.015
(55,88±0,38)
2.000±.010
(50,8±0,25)
.100(2,54)
TYP.
RETAINING
STUDS
.220±.010
(5,59±25,4)
.100±.010
(2,54±0,25)
BUTTONNO.1
.093±.005
(2,36±0,13)
DIA.4PLS.
C
L OF2.200(55,88)DIM.
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•
1
2
3
4
5
6
7
8
9
10
11
12
CODES
3x4 Matrix Single Pole/Common Bus
TERMINAL LOCATION
BUTTON LOCATION
FEDKJHG
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•
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•
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•
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•
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•
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•
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•
•

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
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
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•
•

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
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
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
•

JEAKFBLGCMHDN
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•
.500.010
(12,7±0,25)
(3EQ.SPS)
TOL.NON-
ACCUM.
.380(9,65)
SQ.TYP.
.750±.010
(19,05±0,25)
COL1
COL2
COL3
1.990+.000-.010
(50,55+.000-0,25)
.055±.010
(1,40±0,25)
.105±.010
(2,67±0,25)
ROW1
ROW2
ROW3
ROW4
2.690+.000/
-.010
(68,33+.000/
-0,25)
SWITCHKEY
IDENTIFICATION
(FORREF.ONLY)
.500±.010(12,7±0,25)
(2EQ.SPS.)TOL.NON-
ACCUM.
.600±.010
(15,24±0,25)
.128±.010
(3,25±0,25)
.280±.010
(7,11±0,25)
.025±.002
(0,64±0,05)
SQUARE
TERMINAL
.360±.010
(9,14±0,25)
.072
±.010
(1,83
±0,25)
COL=COLUMN
BUTTONAREASAREEMBOSSED
123
456
789
101112
.150±.005
(3,81±0,13)R.
FEATURES
•SealedKeyboard
•ColorfulGraphicOverlay
•Audible,Snap-DomeContact
•UserLegendableStyles
•3,000,000OperationsperButton
•OptionalPanelSealGasketto
ProtectYourEquipment
MATRIX TERMINAL PIN-OUT
DEFGHJ K
.100
TYP.
.600
SINGLE POLE COMMON BUS TERMINAL
ABCDEFGHJKLMN
.100
TYP.
1.200
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
SERIES 88
Sealed, Flange Mounted
DIMENSIONS ininches(andmillimeters)
4x4 Keyboard
Termination ininches(andmillimeters)
4x4 Dotsinthechartindicateconnectedterminalswhenswitch
isclosed.Terminalsareidentiedonthekeyboard.
Code and Truth Table
3.000
±.015
(76,2
±0,38)
2.800
±.010
(71,12
±0,25)
.200±.010
(5,08±0,25)
ABEFGKLMRST
2.700±.010
(68,58±0,25)
2.500±.010
(63,5±0,25)
.100(2,54)
TYP.
RETAINING
STUDS
.220±.010
(5,59±25,4)
.100±.010
(2,54±0,25) BUTTONNO.1
.093±.005
(2,36±0,13)
DIA.4PLS.
C
L OF2.700(68,58)DIM.
.050±.003
(1,27±0,08)
CODES
4x4
Matrix Single Pole/Common Bus
TERMINAL LOCATION
BUTTON LOCATION
H G F E M L K J
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P J E A R L F B S M H C T N G D K
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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.500.010
(12,7±0,25)
(3EQ.SPS)
TOL.NON-
ACCUM.
.380(9,65)
SQ.TYP.
.750±.010
(19,05±0,25)
COL1
COL2
COL3
COL4
2.490+.000-.010
(63,25+.000-0,25)
.055±.010
(1,40±0,25)
.105±.010
(2,67±0,25)
ROW1
ROW2
ROW3
ROW4
2.690+.000/
-.010
(68,33+.000/
-0,25)
SWITCHKEY
IDENTIFICATION
(FORREF.ONLY)
.500±.010(12,7±0,25)
(3EQ.SPS.)TOL.NON-
ACCUM.
.600±.010
(15,24±0,25)
.128±.010
(3,25±0,25)
.280±.010
(7,11±0,25)
.025±.002
(0,64±0,05)
SQUARE
TERMINAL
.360±.010
(9,14±0,25)
.072
±.010
(1,83
±0,25)
COL=COLUMN
BUTTONAREASAREEMBOSSED
1234
5678
9101112
13141516
.150±.005
(3,81±0,13)R.
FEATURES
•SealedKeyboard
•ColorfulGraphicOverlay
•Audible,Snap-DomeContact
•UserLegendableStyles
•3,000,000OperationsperButton
•OptionalPanelSealGasketto
ProtectYourEquipment
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
DIMENSIONS ininches(andmillimeters)
5x4 Keyboard
Termination ininches(andmillimeters)
5x4 Keyboard Dotsinthechartindicateconnectedterminalswhenswitchisclosed.
Terminalsareidentiedonthekeyboard.
Code and Truth Table
CODES
5x4 Matrix Single Pole/Common Bus
TERMINAL LOCATION
BUTTON LOCATION
PNKGFJLMH 
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•
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
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
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
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
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•

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
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•

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
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
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
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•
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1
2
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6
7
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9
10
11
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13
14
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17
18
19
20
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•
•

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•
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•
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•
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•
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•
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
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
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
•

TPMHDUQLGCVRKFBWSJEAN
SERIES 88
Sealed, Flange Mounted
.500.010
(12,7±0,25)
(3EQ.SPS)
TOL.NON-
ACCUM.
.380(9,65)
SQ.TYP.
.750±.010
(19,05±0,25)
COL1
COL2
COL3
COL4
COL5
2.990+.000-.010
(75,95+.000-0,25)
.055±.010
(1,40±0,25)
.105±.010
(2,67±0,25)
ROW1
ROW2
ROW3
ROW4
2.690+.000/
-.010
(68,33+.000/
-0,25)
SWITCHKEY
IDENTIFICATION
(FORREF.ONLY)
.500±.010(12,7±0,25)
(4EQ.SPS.)TOL.NON-
ACCUM.
.600±.010
(15,24±0,25)
.128±.010
(3,25±0,25)
.280±.010
(7,11±0,25)
.025±.002
(0,64±0,05)
SQUARE
TERMINAL
.360±.010
(9,14±0,25)
.072
±.010
(1,83
±0,25)
COL=COLUMN
BUTTONAREASAREEMBOSSED
12345
678910
1112131415
1617181920
.150±.005
(3,81±0,13)R.
FEATURES
•SealedKeyboard
•ColorfulGraphicOverlay
•Audible,Snap-DomeContact
•UserLegendableStyles
•3,000,000OperationsperButton
•OptionalPanelSealGasketto
ProtectYourEquipment
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
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
PANEL SEAL GASKETS
Subpanel Mounting Topside Mounting
Subpanel3x4 Part No. 88M2001-2
Subpanel4x4 Part No. 88M2009-2
Subpanel5x4 Part No. 88M2019-1
Topside3x4 Part No. 88M2012-1
Topside4x4 Part No. 88M2015-1
Topside5x4 Part No. 88M2018-1
Weatherproofandwaterproofyoursubpanel
andtopsidemountedkeyboardswithoptional
panelsealgaskets.
Subpanelkeyboardgasketis.062"(1,57mm)
thick;topsidekeyboard gasketis.094"(2,39
mm).
Materialiscelluloseber,foam,nitrilerubber.
Ordergasketsseparatelyfromkeyboard.
DIM.A
DIM.B
2.710
±.005
(68,83
±0,13)
3.200
±.005
(81,28
±0,13)
DIM.C
2.850
±.005
(72,39
±0,13)
2.500
±.005
(63,5
±0,13)
DIM.D
Size of Subpanel Mount Topside Mount
Keyboard Dim. A Dim. B Dim. C Dim. D
3x4 2.010±.005 2.400±.005 1.800±.005 2.040±.005
(51,05±0,.13) (60,96±0,13) (45,72±0,13) (51,82±0,13)
4x4 2.510±.005 2.900±.005 2.300±.005 2.540±.005
(63,75±0,13) (73,66±0,13) (58,42±0,13) (64,52±0,13)
5x4 3.010±.005 3.400±.005 2.800±.005 3.040±.005
(76,45±0,13) (86,36±0,13) (71,12±0,13) (77,22±0,13)
INSTANT CUSTOM LEGENDS
Available through Distributors
Createyourownlegendsusingthese3items:1)
ablankkeyboard,2)theclearwindowoverlays
shownonStandardLegendpageand3)asheet
oflegendinserts.
Blank Keyboards
Thenumbersbeloworderblankkeyboardsfor
theusertolegend.Fordescription,refertothe
partnumberingschemebelow.Thekeyboards
andoverlaysareorderedseparately.
3x4Matrix Part No. 88AB2
3x4SP/ComBus Part No. 88AC2
4x4Matrix Part No. 88BB2
4x4SP/ComBus Part No. 88BC2
5x4Matrix Part No. 88JB2
5x4SP/ComBus Part No. 88JC2
Legend Insert Sheet and Dry Transfers
Self-adhesive inserts are die-cut to t the
ORDERING INFORMATION
Grayhill Series Number
Size Option
A=3x4
B=4x4
J=5x4
Circuitry Option
B2=Matrixcode
C2=Singlepole/commonbus
88AB2–152
Standard Legend Choices
3x4Size:-143,-152,or-172
4x4Size:-052,-072or-082
5x4Size:-252or-262
Available from your local Grayhill Distributor.
For prices and discounts, contact a local
SalesOfce,anauthorizedlocalDistributoror
Grayhill.
button.Legendsareprintedinblackonclear
lminNewsGothicCondensedtypestyle.They
include letters A through Z, numbers 0-69,
telephone legends, commonly used words,
symbolsandblanks.
Part No. 87AC2046
Usematchingdrytransfer letteringonblank
insertsoflegendsheet:upperandlowercase
letters,0-9,andcommonsymbols.
SmallPrint Part No. 87-DT-2096-088
MediumPrint Part No. 87-DT-2096-125
LargePrint Part No. 87-DT-2096-187
Clear Window Overlays
Order separately from keyboards. See also
orderinginformation.
3x4Overlay Part No. 88-101
4x4Overlay Part No. 88-001
5x4Overlay Part No. 88-201
PRINTED LEGENDS
Not available through Distributors.Formedium
volumeapplications,orwherelegendscannot
be produced by the self legend method, you
canorder epoxyinkprintedlegends.Virtually
anything which can be photographed can be
printed.Grayhillwillprintyourlegendandthen
addtheclearwindowoverlay.
Type Simulated Character & Line
I.D. No. Style & Size Limitations *
4GH088
1GH125
3GH187
2GH250
ABCDEFGH
ABCDE
ABCD
END
DATA
LAD
ON
15
ABC