Keyboards and Keypads
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Modular Keyboards
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
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.
DIMENSIONS In inches (and millimeters)
One Button Module
Two Button Module
Snap Dome Contact System
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.
BUTTON
HOUSING
PC BOARD
CIRCUIT
PATH
DOME
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
A
.490 ± .010
(12,45 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.350 ± .010
(8,89 ± 0,25)
.075 ± .010 TYP.
(1,91 ± 0,25)
.300 ± .010
(7,62 ± 0,25)
.095 ± .010
(2,41 ± 0,25)
.095 ± .010
(2,41 ± 0,25)
.064 ± .010 TYP.
(1,63 ± 0,25)
SWITCH KEY IDENTIFICATION
(FOR REF. ONLY) .163 ± .010
(4,14 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
A
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
A B
.490 ± .010
(12,45 ± 0,25)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095 ± .010
(2,41 ± 0,25)
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.350 ± .010
(8,89 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
.990 ± .010
(25,15 ± 0,25)
.245 ± .010
(6,22 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
.500 ± .010
(12,7 ± .010)
.300 ± .010
(7,62 ± 0,25)
.095 ± .010
(2,41 ± 0,25)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010 TYP.
(1,63 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
AB
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
Keypads
46
Keyboards and Keypads
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Modular Keyboards
DIMENSIONS In inches (and millimeters)
Three Button Module
Four Button Module
Five Button Module
Six Button Module
A B C
.499 ± .010
(12,45 ± 0,25)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095 ± .010
(2,41 ± 0,25)
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.500 (12,7) 2 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25)
.350 ± .010
(8,89 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
.500 (2,7) 2 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25)
.095 ± .010
(2,41 ± 0,25)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010 TYP.
(1,63 ± 0,25)
1.499 ± .010
(37,85 ± 0,25)
.245 ± .010
(6,22 ± 0,25)
.300 ± .010
(7,62 ± 0,25)
.015 ± .010 (0,38 ± 0,25)
BUTTON PROJECTION
ABC
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
A B CD
.499 ± .010
(12,45 ± 0,25)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095 ± .010
(2,41 ± 0,25)
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.500 (12,7) 3 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25) .350 ± .010
(8,89 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
.500
(
2,7
)
3
EQ
.
SPS
.
TOL. NON-ACCOM.
± .010 (0,25)
.095
± .010
(2,41
± 0,25)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010
TYP.
(1,63 ± 0,25)
1.998 ± .015
(50,55 ± 0,38)
.245 ± .010
(6,22 ± 0,25)
.300 ± .010
(7,62 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
ABCD
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
A B CDE
.499
± .010
(12,45
± 0,25)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095
± .010
(2,41
± 0,25)
SWITCH KEY IDENTIFICATION
(FOR REF. ONLY)
.350 ± .010
(8,89 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
.095
± .010
(2,41
± 0,25)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010
TYP.
(1,63 ± 0,25)
2.498 ± .015
(63,25 ± 0,38)
.500
(
12,7
)
4
EQ
.
SPS
.
TOL. NON-ACCUM.
± .010 (0,25)
.245
± .010
(6,22
± 0,25)
.500 (2,7) 4 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25)
.300 ± .010
(7,62 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
B
ACD
E
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS AT
BOTTOM OF SWITCH
A B CDEF
.499 ± .010
(12,45 ± 0,25)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.025 ± .002
(0,64 ± 0,05)
SQ. TERMINAL
.095 ± .010
(2,41 ± 0,25)
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.350 ± .010
(8,89 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
.095 ± .010
(2,41 ± 0,25)
.075 ± .010
(1,91 ± 0,25)
.064 ± .010 TYP.
(1,63 ± 0,25)
.500 (2,7) 5 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25)
.300 ± .010
(7,62 ± 0,25)
2.998 ± .015
(75,95 ± 0,38)
.500 (12,7) 5 EQ. SPS.
TOL. NON-ACCUM.
± .010 (0,25)
.245 ± .010
(6,22 ± 0,25)
.015 ± .010
(0,38 ± 0,25)
BUTTON
PROJECTION
BACDEF
COMMON
TERMINAL I.D.
(FOR REF. ONLY)
TERMINAL PINS
AT BOTTOM OF
SWITCH
Keypads
47
Keyboards and Keypads
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Modular Keyboards
DIMENSIONS In inches (and millimeters)
3x4 Keyboard
Termination In inches (and millimeters)
3x4 Matrix Output Single Pole/Common Bus
DIMENSIONS In inches (and millimeters)
4x4 Keyboard
12 3
45 6
78 9
10 11 12
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.500 ± .010 (12,7 ± 0,25)
2 EQ. SPS.TOL. NON-
ACCUM.
ROW 1
ROW 2
ROW 3
ROW 4
COL 1
COL 2
COL 3
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.245 ± .010
(6,22 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
3 EQ. SPS.
TOL. NON-
ACCUM.
.350 ± .015
(8,90 ± 0,25)
1.500 ± .010
(37,85 ± 0,25)
2.000 ± .010
(50,55 ± 0,25)
.695 ± .010
(17,65 ± 0,25)
.060 ± .010
(1,52 ± 0,25) TYP.
RETAINING
STUDS
BUTTON
NO. 1
COL = COLUMN
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
2.000 + .000 – .005
(50,8 – 0,13)
12 3
56 7
910 11
13 14 15
4
8
12
16
SWITCH KEY
IDENTIFICATION
(FOR REF. ONLY)
.366 ± .010
(9,30 ± 0,25)
SQ. BUTTON
.500 ± .010 (12,7 ± 0,25)
3 EQ. SPS.TOL. NON-
ACCUM.
.250 ± .010
(6,35 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
3 EQ. SPS.
TOL. NON-
ACCUM.
.350 ± .010 (8,90 ± 0,25)
.163 ± .010
(4,14 ± 0,25)
2.000 + .000
– .005
(50,8 – 0,13)
.064 ± .010
(1,63 ± 0,25)
TYP.
.100 (2,5)
TYP.
RETAINING
STUDS
BUTTON
NO. 1
ROW 1
ROW 2
ROW 3
ROW 4
COL 1
COL 2
COL 3
COL 4
COL = COLUMN
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
.163 ± .010
(4,14 ± 0,25)
.495 ± .010
(12,57 ± 0,25)
.500 ± .010
(12,7 ± .010)
.895 ± .010
(22,73 ± 0,25)
.100
(2,5)
TYP.
.163 ± .010
(4,14 ± 0,25)
.163
± .010
(4,14
± 0,25)
.495 ± .010
(12,57 ± 0,25)
.500 ± .010
(12,7 ± .010)
.100
(2,5)
TYP.
BUTTON
NO. 1
BUTTON
NO. 1
B
C
D
EM
L
K
.300 ± .010
(7,62 ± 0,25)
.600 ± .010
(15,24 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
.300
B
C
D
E
K
L
M
.100 TYP
.500
.600
A
B
C
D
H
J
K
.100 TYP .500
L
M
N
E
F
G
SINGLE POLE/COMMON BUS
TERMINAL PIN-OUT
MATRIX TERMINAL PIN-OUT
Keypads
48
Keyboards and Keypads
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Modular Keyboards
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
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
Operating Features
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
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.
Code and Truth Table
Dots in the chart indicate connected terminals
when switch is closed. Terminals are identified
on the keyboard.
1
2
3
4
5
6
7
8
9
10
11
12
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
CODES
3x4 Matrix Single Pole/Common Bus
TERMINAL LOCATION
BUTTON LOCATION
K D E B C L M K H A J C B M E F L N G D
•
•
•
•
•
•
•
•
•
•
•
•
•
•
••
•
••
•
••
•
•
•
•
•
•
•
•
•
•
•
•
•
•
••••••••••••
CODES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
4x4 Matrix Single Pole/Common Bus
TERMINAL LOCATION
BUTTON LOCATION
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
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
••
•
•
•
••••••••••
••
••••
Termination In inches (and millimeters)
4x4 Matrix Output Single Pole/Common Bus
COMMON
UNDER
BUTTON A
CIRCUIT DIAGRAM
A
B
C
.163 ± .010
(4,14 ± 0,25)
.500 ± .010
(12,7 ± 0,25)
1.000 ± .010
(25,4 ± .010)
.695 ± .010
(17,65 ± 0,25)
.100
(2,5)
TYP.
BUTTON
NO. 1
.163 ± .010
(4,14 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
.500 ± .010
(12,7 ± 0,25)
1.000 ± .010
(25,4 ± .010)
.795 ± .010
(20,19± 0,25)
.100
(2,5)
TYP.
BUTTON
NO. 1
.300 ± .010
(7,62 ± 0,25)
D
E
F
GQ
P
N
M
A
B
C
D
E
F
G
H
JS
R
Q
P
N
M
L
K
.800 ± .010
(20,32 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
MATRIX TERMINAL PIN-OUT SINGLE POLE/COMMON BUS
TERMINAL PIN-OUT
.300
D
E
F
G
.100 TYP
1.000
M
N
P
Q
.800
.100 TYP 1.000
K
L
M
N
P
Q
R
S
E
F
G
H
A
B
C
D
J
Keypads
49
Keyboards and Keypads
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Modular Keyboards
Type No. Sample Style Sub Surface Top Surface
and Typical and Typical Character and Character and
Height Sizes Line Limitations Line Limitations
4GH088
.083"
1GH125
.138"
3GH187
.207"
2GH250
.276" ABC
ABCD
ABCDE
ABCDEFGH 4 Characters
2 Lines
3 Characters
1 Line
2 Characters
1 Line
N/A N/A
4 Characters
2 Lines
3 Characters
1 Line
2 Characters
1 Line
2 Characters
1 Line 15
ON
LAD
END
DATA
ON
LAD
END
DATA
ORDERING INFORMATION
Type of Module Part
or Legend Number
1 Button 87CC3-201
2 Button 87DC3-201
3 Button 87EC3-201
4 Button 87FC3-201
5 Button 87GC3-201
6 Button 87HC3-201
12 Button–Matrix 87AB3-201
12 Button–
SP/Com Bus 87AC3-201
16 Button–Matrix 87BB3-201
16 Button–
SP/Com Bus 87BC3-201
Insertable Legend
Card 87AC2046
Dry Transfer–Small 87-DT-2096-088
Dry Transfer–Medium 87-DT-2096-125
Dry Transfer–Large 87-DT-2096-187
Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales
Office, an authorized local Distributor or Grayhill.
Special Legends
To order non-standard modules, information is
required for the areas listed below.
Your special order will be assigned a part number
for future identification. This number is
sequentially assigned and is non-descriptive.
1. Type of Module. 1, 2, 3, 4, 5, 6, 12 or 16
button.
2. Mounting Orientation. Horizontal or vertical.
3. Circuitry. Single pole/common bus is standard
for all single row modules. For 12 or 16 button
keyboard, specify single pole/common bus or
matrix.
4. Housing Color. Standard housing is black.
Optional stock colors include beige and gray.
5. Button Types. Flat or concave buttons are
available for molded legends; flat, concave,
and snap-on cap styles are available for
printed legends.
6. Button Color. Standard buttons for molded
and printed legends are white with black
legend. Other colors available include white
legends with red, green, dark blue, dark
gray and black buttons, or black legends
with yellow, blue, light gray, beige and
white buttons. Additional legend colors such
as red are also available.
7. Legend Style. Two-shot molded or printed.
Printed legends may be top or sub-surface
printed.
8. Actual Legend. Specify for each button
using the button identification on drawings.
Price–Contact Grayhill.
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.
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
Dry Transfer Legends
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
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.
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.
Molded-in Legends
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.
Keypads
50
