Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois

60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com

Modular Keyboards

SERIES 82

Lightable

FEATURES

Centers

• Long, Stroke, Wiping Contact

• Lightable Modules

• Choice of 5 Circuitries with

Unlighted Modules

• User Legendable

LIGHTABLE MODULES

Light Source and Lamp Mounting

Each lightable button fits over a T-1 size LED

or incandescent lamp mounted to PC board

(see Figure 2-2a). The height of the lamp

should not exceed .250" (6,35 mm) from the

surface of the board. (Note: Grayhill does not

manufacture or sell LED's or incandescent

lamps).

For easy light replacement, mount the lamp or

LED through the back or solder side of the

board (see Figure 2). This method of mounting

allows you to replace light source without

removing the keyboard module. The other

method of light mounting (Figure 2a) requires

MOUNTING

Build a custom keyboard with identical button

distances no matter how you stack them.

Designed to plug into any printed circuit board

For Lightable Modules which will be continuously

lit, mixing vertically mounted modules with

Figure 1 Panel Mount Cutout Diagram

Lightable Modules

Unlighted Modules

horizontally

mounted

modules

is

not

recommended; the orientation of the rectangular,

lighted area will differ. See drawings.

See Figure 1 Panel Cutout diagram for 6 button

module mounting dimensions. Refer to drawings

for other module dimensions.

desoldering the keyboard module then

desoldering the lamp when it's necessary to

replace the light source.

The chart below lists ratings for a size T-1

incandescent lamp. To extend the life of the

lamp, use an alternating current and reduced

voltage. The chart also lists maximum

temperatures the module can withstand. For

higher temperatures, Grayhill offers modules

made of special plastics, polyester switch

housing and polycarbonate internal button. All

measurements were determined under

laboratory conditions. (Mounted model

continuously lit in temperature controlled oven

with continuously circulating air for 24 hours.)

Maximum

Max, Temp.

Intensity and

Service

Allowable

for Modules

Lamp

Mean Spherical

Life

Current

Ambient

With Special

Number*

Candle Power

Volts

in Hours Per Lamp

Temperature

Plastics

715

Bright .15 MSCP

5 V

40,000

115 mA

130°F

200°F

680

Moderate .03 MSCP 5 V

100,000

60 mA

150°F

220°F

*Lamps not available from Grayhill.

Incandescent Lamp–Size T-1

Figure 2a

Mounted from

component side

Figure 2

Easy replacement

mounting

.250

(6,35)

MAX.

.170 (4,32)

.531

(13,49)

SQ.

.687 (17,45)

.687 (17,45)

.343

(8,71)

.687

(17,45)

C

L

C

L

Keypads

40