Standard Keypads
SerieS 87
low Profile
FeatureS
• 1, 2, 3, 4, 5 and 6 Button Individual
Keyswitches
• 12 and 16 Button Keypads
• Maintain
1
/
2
" Button Centers, no
Matter How You Mount Modules or
What Combination You Use
• Up to 3,000,000 Operations per
Button
• Low Profile Design
Keyboards and Keypads
legends For any need
Design Keyboards and Individual Keyswitches
to Virtually any Configuration Without Costly
Tooling.
Prototypes and small quantities: create your
own with economical, insertable legend style
modules.
Production quantities: choose either custom
printing or permanent molded-in legends.
Snap Dome Contact System
BUTTON
hear and feel button actuation
You're assured of reliable button actuation
with the metal snap-dome under each Series
87 button. When actuated, the dome changes
shape, providing audible and tactile feedback
to the operator.
HOUSING
DOME
CIRCUIT
PATH
PC BOARD
DimenSionS
in inches (and millimeters)
one Button module
.064 ± .010 TYP.
(1,63 ± 0,25)
.300 ± .010
(7,62 ± 0,25)
COMMON
.075 ± .010 TYP.
(1,91 ± 0,25)
A
.490 ± .010
(12,45 ± 0,25)
A
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
SWITCH KEY IDENTIFICATION
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095 ± .010
(2,41 ± 0,25)
.350 ± .010
(8,89 ± 0,25)
TERMINAL I.D.
(FOR REF. ONLY)
.095 ± .010
(2,41 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
two Button module
.990 ± .010
(25,15 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
.490 ± .010
(12,45 ± 0,25)
.245 ± .010
(6,22 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.350 ± .010
(8,89 ± 0,25)
.300 ± .010
(7,62 ± 0,25)
.500 ± .010
(12,7 ± .010)
.095 ± .010
(2,41 ± 0,25)
A
B
A
B
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
.163 ± .010
(4,14 ± 0,25)
.095 ± .010
(2,41 ± 0,25)
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010 TYP.
(1,63 ± 0,25)
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Standard Keypads
termination
4x4
.100
(2,5)
TYP.
.300
±
.010
(7,62
±
0,25)
in inches (and millimeters)
matrix output
BUTTON
NO. 1
Single Pole/Common Bus
.163 ± .010
(4,14 ± 0,25)
.100
(2,5)
TYP.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
BUTTON
NO. 1
.163 ± .010
(4,14 ± 0,25)
D
E
F
G
M
N
P
Q
.025 ± .002
(0,64 ± 0,05)
.800 ± .010
Sq. Terminals (20,32 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
.795 ± .010
(20,19± 0,25)
.695 ± .010
(17,65 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
1.000 ± .010
(25,4 ± .010)
Keyboards and Keypads
.500 ± .010
(12,7 ± 0,25)
1.000 ± .010
(25,4 ± .010)
.100 TYP
A
B
C
D
E
F
G
H
J
1.000
1.000
.100 TYP
.300
D
E
F
G
M
N
P
Q
.800
K
L
M
N
P
Q
R
S
MATRIX TERMINAL PIN-OUT
SINGLE POLE/COMMON BUS
TERMINAL PIN-OUT
CirCuitrY, CoDe anD truth taBleS
Circuitry for module Strips
The one-button thru six-button modules have
single pole/common bus circuitry as shown
in the circuit diagram. The common is located
under button A; it is not marked on the actual
product.
COMMON
UNDER
BUTTON A
A
B
C
CIRCUIT DIAGRAM
Code and truth table
Dots in the chart indicate connected terminals
when switch is closed. Terminals are identified
on the keyboard.
4x4
3x4
1
2
3
4
5
6
7
8
9
10
11
12
CoDeS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
•
•
•
• •
•
•
• •
•
•
•
•
•
•
•
•
•
•
•
• •
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
• •
•
•
K D E B C L M H A J C B M E F L N G D
K
•
terminal loCation
matrix
Single Pole/Common Bus
•
•
•
•
•
•
•
• •
•
•
• •
•
•
•
•
•
•
•
•
•
•
•
•
•
•
• •
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
• •
M N G F D E P Q K N B A L M D C Q P F G S R E H J
•
•
terminal loCation
matrix
CoDeS
Single Pole/Common Bus
SPeCiFiCationS
rating
rating at 24 Vdc: 10 milliamps, resistive
Contact resistance: MOS, CMOS, TTL, DTL
compatible (10 ohms maximum)
Voltage Breakdown: 250
Vac between mutually
insulated parts
insulation resistance: 1,000 megohms min.
life expectancy: 3,000,000 operations per
button
Contact Bounce: Less than 4 milliseconds at
make, 10 milliseconds at break
Button loCation
materials and Finishes
housing: ABS polycarbonate, black
Buttons:
ABS plastic, white. Legends are
black.
Snap-on-Cap: Clear polycarbonate
Contact Dome:
Stainless steel, selectively
gold-plated
terminals:
Phosphor bronze
Button loCation
Button travel:
0.011" (0,28) nominal, total
travel
operating temperature: -40°C to +80°C
typical operating Force: 300 grams
mounting:
Mounts to
1
/
32
" to
1
/
8
" thick PC
board
operating Features
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Standard Keypads
StanDarD legenDS
insertable Style modules
For prototypes and small quantities
Standard insertable legend modules are an
economical way to create your own keyboard
legend. Just remove the clear button cap, add
any legend, and replace the snap-on cap.
Dry transfer legends
legend inserts
For insertable legend modules
Give your keyboard modules the appearance
of being printed without the cost. Self-adhesive,
printed legend inserts are die cut to fit the
buttons. Legend sheet includes commonly
used symbols, terms, alpha characters A-Z,
and numeric characters 0-99 in News Gothic
Condensed typestyle, printed in black on clear
backing. Legend sheets also include blank inserts
for dry transfer lettering.
87 Series Legend Sheet Part
no. 87aC2046
type no.
and typical
height
4gh088
.083"
1gh125
.138"
3gh187
.207"
2gh250
.276"
Sample Style
and typical
Sizes
ABCDEFGH
For additional legend inserts
Sheets include A thru Z in upper and lower
case, the numeric characters 0 thru 9, as well
as commonly used symbols. The typestyle and
size are similar to the chart for printed legends
shown below.
Small Print
Part no. 87-Dt-2096-088
Medium Print
Part no. 87-Dt-2096-125
Large Print
Part no. 87-Dt-2096-187
The legend can be printed on either of two
surfaces: the top surface of a one-piece button,
or the internal surface on the snap-on cap style
for maximum wear.
The typestyle chart shows the style and the
approximate limitations of Grayhill's standard
type. However, limitations differ with the surface to
be printed and the actual characters to be used.
If your legend exceeds the chart limits, contact
Grayhill for more information. Unless specified,
black legends are printed on white buttons.
additional ink Color: White ink is stocked for
use on dark colored buttons.
additional Button Colors:
For a molding
charge, we can provide buttons from other colors
which we may have in stock, such as black,
red, green, blue, or yellow. Non-stock button/ink
colors may require minimum material purchase.
To order, or to check currently stocked colors,
contact Grayhill.
SPeCial legenDS
Printed legends
For medium volume or short runs
Virtually any character, symbol or pattern which
can be photographed can be printed on the
button. Grayhill uses epoxy ink which bonds to
the surface of the button.
Keyboards and Keypads
Sub Surface
Character and
line limitations
4 Characters
2 Lines
3 Characters
1 Line
2 Characters
1 Line
END
DATA
top Surface
Character and
line limitations
4 Characters
2 Lines
3 Characters
1 Line
2 Characters
1 Line
2 Characters
1 Line
END
DATA
molded-in legends
ABCDE
LAD
LAD
For high volume production
For legends that will stand up to abuse and
constant wear for the life of your keyboard,
use molded-in legends. The two-shot molding
process molds the legend and button together.
Your special legend can be made from existing
Grayhill molds or we can tool special ones.
Buttons are available with black legends molded
in white or other light backgrounds, or with white
legends molded into dark backgrounds. See
Printed Buttons, Additional Button Colors. To order,
contact Grayhill.
ABCD
ON
N/A
ON
ABC
Part
number
87CC3-201
87DC3-201
87eC3-201
87FC3-201
87gC3-201
87hC3-201
87aB3-201
87aC3-201
87BB3-201
87BC3-201
N/A
15
orDering inFormation
type of module
or legend
1 Button
2 Button
3 Button
4 Button
5 Button
6 Button
12 Button–Matrix
12 Button–
SP/Com Bus
16 Button–Matrix
16 Button–
SP/Com Bus
Insertable Legend
Card
Dry Transfer–Small
Dry Transfer–Medium
Dry Transfer–Large
Special legends
87aC2046
87-Dt-2096-088
87-Dt-2096-125
87-Dt-2096-187
5. Button types.
Flat or concave buttons
To order non-standard modules, information is
are available for molded legends; flat,
required for the areas listed below.
concave,
and snap-on cap styles
Your special order will be assigned a part
are available for printed legends.
number for future identification. This number
6. Button Color. Standard buttons for molded
is sequentially assigned and is non-descriptive.
and printed legends are white with black
legend. Other colors available include white
1. type of module.
1, 2, 3, 4, 5, 6, 12 or 16
legends with red, green, dark blue, dark
button.
gray and black buttons, or black legends
2. mounting orientation.
Horizontal or
with yellow, blue, light gray, beige and white
vertical.
buttons. Additional legend colors such as
3. Circuitry. Single pole/common bus is standard
red are also available.
for all single row modules. For 12 or 16 button
7. legend Style. Two-shot molded or printed.
keyboard, specify single pole/common bus or
Printed legends may be top or sub-surface
matrix.
printed.
4. housing Color.
Standard housing is black.
8. actual legend.
Specify for each button
Optional stock colors include beige and
using the button identification on drawings.
gray.
Price–Contact Grayhill.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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