Grayhill Keypads 87 Series - Manual (Page 4)

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
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
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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
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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
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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
G Q
P
N
M
A
B
C
D
E
F
G
H
J
S
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