87BC3-201 Grayhill Inc, 87BC3-201 Datasheet - Page 4

• Manufacturer Part Number: 87BC3-201
• Description: KEYBOARD MODULE 16BUT COMMON BUS
• Manufacturer: Grayhill Inc
• Series: 87r

Specifications of 87BC3-201

• Switch Type: Snap Dome
• Number Of Keys: 16
• Matrix (columns X Rows): 4 x 4
• Output Type: Common Bus
• Key Type: Transparent Key Cap
• Legend: Customizable (Sold Separate)
• Interchangeable Legends: Yes
• Illumination: Non-Illuminated
• Seal Rating: None
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q1242260

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
Termination
CIRCUITRY, CODE AND TRUTH TABLES
Keypads
4x4
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.
(20,19± 0,25)
(7,62
46
.795 ± .010
.300
.500 ± .010
(12,7 ± 0,25)
±
±
.010
0,25)
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
1.000 ± .010
(25,4 ± .010)
(2,5)
.100
TYP.
In inches (and millimeters)
3x4
10
11
12
1
2
3
4
5
6
7
8
9
Matrix Output
K D E B C L M K H A J C B M E F L N G D
•
•
•
•
D
E
F
G
•
•
•
•
Modular Keyboards
Matrix
•
•
•
•
•
•
•
•
•
•
•
•
•
TERMINAL LOCATION
•
•
•
M
N
P
Q
•
CODES
•
Single Pole/Common Bus
•
•
•
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
NO. 1
•
•
•
•
COMMON
UNDER
BUTTON A
•
•
•
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
.163 ± .010
(4,14 ± 0,25)
•
•
•
•
•
•
•
•
•
•
•
•
60525-5997 • USA • Phone: [phone] • Fax: [phone] • www.grayhill.com
CIRCUIT DIAGRAM
4x4
(12,7 ± 0,25)
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
(20,32 ± 0,25)
(17,65 ± 0,25)
.500 ± .010
.800 ± .010
.695 ± .010
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
•
•
•
•
•
•
•
•
•
•
•
•
Matrix
.100
(2,5)
TYP.
1.000 ± .010
(25,4 ± .010)
A
B
C
•
•
•
•
•
•
•
•
Single Pole/Common Bus
•
•
•
•
•
•
•
•
•
•
•
•
TERMINAL LOCATION
•
A
B
C
D
E
F
G
H
J
•
•
CODES
Code and Truth Table
Dots in the chart indicate connected terminals
when switch is closed. Terminals are identified
on the keyboard.
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
board
•
Single Pole/Common Bus
•
•
•
•
K
L
M
N
P
Q
R
S
•
•
•
•
•
BUTTON
NO. 1
•
•
1
/
32
•
" to
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
.163 ± .010
(4,14 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
Sq. Terminals
/
8
" thick PC