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 5 Vdc: 100 milliamps

Contact Resistance: 25 milliohms or less on a

new switch

Voltage Breakdown: 250 Vac between mutually

insulated parts

Insulation Resistance: 1,000 megaohms

minimum

Life Expectancy: 1,000,000 operations

Contact Bounce: 10 milliseconds or less for

the life of the switch

Operating Temperature: -40°C to 80°C

Materials and Finishes

Pin Contact: Brass, gold plate over nickel plate

SPECIAL LEGENDS

Molded-In Legends

For Unlighted Modules

In addition to standard white

legend on gray button, long-

wearing, molded-in legends are

available in white button with black

legend and white legend with red,

green or black buttons. Other

color combinations are possible.

Printed Legends (2 Styles)

Virtually anything which can be photographed

can be printed. Sturdy epoxy ink printing bonds

to the surface of the button. Standard printing

for the gray unlighted buttons is white; standard

printing for the translucent white buttons of the

lightable modules is black.

Top Surface Printing: Legend is applied directly

to top of button. Available on all standard,

unlighted modules.

Sub Surface Printing: Provides maximum wear

for printed surfaces. Available for lighted and

unlighted gray modules. Printed internal button

cap is protected by a clear outer cap.

4GH088

.083"

1GH125

.138"

3GH187

.207"

2GH250

.276"

ABC

ABCD

ABCDE

ABCDEFGH

5 Char.

2 Lines

4 Char.

1 Line

2 Char.

1 Line

2 Char.

1 Line

OPER

TAB

INDEX

ON

8 Char.

3 Lines

4 Char.

2 Lines

3 Char.

1 Line

2 Char.

1 Line

4 Char.

2 Lines

3 Char.

1 Line

2 Char.

1 Line

N/A

N/A

OFF

15

15

RESEARCH

SYSTEMS

12345678

CODE

SEND

STOP

1234

OFF

ON

Type No.

Sample Style

Sub Surface

Top Surface

Lightable Module

and Typical

and Typical

Character and

Character and

Character and

Height

Sizes

Line Limitations

Line Limitations

Line Limitations*

Note: Limitations for legends differ with surface to be printed and actual characters. If your application exceeds the approximations

in the chart, contact Grayhill for more information.

* For top and sub-surface printed modules.

STANDARD LEGENDS

Telephone Keyset

Two 6-button modules

form the keyset. White

telephone legend is

molded into a gray

button. SPST, 2PST,

3PST,

and

4PST

circuitry

available

from distributors, see

ordering information;

order special circuitry

from Grayhill.

Non-Legend, Lighted Modules

Standard lightable module configurations

without cap slot for insertable legend.

Insertable Legend Styles

Prototypes can look professional with insertable

legend modules. Just slip imprinted legend insert

through the slot of the clear button cap.

Legend Sheet

Available for each module style. Each sheet

contains commonly used symbols, terms, alpha

characters, and 0-19 in News Gothic Condensed

type on polyester film, ready to be cut and

inserted. Deadfront legends are invisible until lit.

White on Clear: For unlighted gray modules

Part No. 82AC2017-1

Black on Clear: For lighted gray modules

Part No. 82AC2050-1

Translucent White on Black: For black modules

Part No. 82AC2060

Deadfront on Black: For black modules

Spring Contact: Copper alloy, gold plate over

nickel plate

Housing: ABS plastic (gray)

Base: PPS plastic (black)

Return Spring: Tinned music wire

Other Parts: (By Module and Legend Style): For

unlighted module with molded legends or top

surface printed legends. Internal Button is acetal

and the Button is ABS plastic (gray).

For unlighted module with sub-surface printed

legends or insertable legends, Internal Button is

acetal; Internal Cap is ABS plastic (gray); and

Clear Cap is polycarbonate plastic. For lightable

modules, the Internal Button and the Clear Cap

are polycarbonate. The Internal Cap for gray

modules is acrylic; for the black modules, the

Internal Cap with window is polycarbonate.

For special lightable modules for higher

temperatures,

internal

button

cap

is

polycarbonate and housing is polyester.

Operating Features

Action: Momentary, wiping contact

Button Travel: 0.130" (3,30 mm) total travel

Overtravel: 0.080" nominal

Operating Force: 8 ± 3 ounces (depends on

number of poles.)

Soldering Instructions

Series 82 Keyboard Modules have been

successfully tested for heat resistance to

soldering up to 260°C (500°F) for a maximum of

5 seconds. Careful flux cleaning is required

since the switch is not sealed. For applications

in excess of these limits or that require vapor

spray or immersion cleaning, contact Grayhill.

Printed Type styles

The type style chart below illustrates type style

and approximate sizes and limits for button cap

legends; other sizes are also available. Limitations

for legends differ with type size and character.

Legends for lightable modules are further limited

by the size of the internal button and lighted area.

Grayhill's library includes many popular legends.

Contact Grayhill for complete information.

Special Colors

Besides the standard

gray and black housings,

you may order white,

beige or brown. Button

colors may also be

specially ordered. For

more information, see

next page.

Keypads

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