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

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

Standard Keypads

SERIES 88

Sealed, Flange Mounted

4x4 Keyboard

4x4

Dots in the chart indicate connected terminals when switch

is closed. Terminals are identified on the keyboard.

Code and Truth Table

3.000

± .015

(76,2

± 0,38)

2.800

± .010

(71,12

± 0,25)

.200 ± .010

(5,08 ± 0,25)

A B

E F G

K L M

R S T

2.700 ± .010

(68,58 ± 0,25)

2.500 ± .010

(63,5 ± 0,25)

.100 (2,54)

TYP.

RETAINING

STUDS

.220 ± .010

(5,59 ± 25,4)

.100 ± .010

(2,54 ± 0,25)

BUTTON NO. 1

.093 ± .005

(2,36 ± 0,13)

DIA. 4 PLS.

C

L OF 2.700 (68,58) DIM.

.050 ± .003

(1,27 ± 0,08)

CODES

4x4

Matrix

Single Pole/Common Bus

TERMINAL LOCATION

H G F E M L K J

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P J E A R L F B S M H C T N G D K

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.500 .010

(12,7 ± 0,25)

(3 EQ. SPS)

TOL. NON-

ACCUM.

.380 (9,65)

SQ. TYP.

.750 ± .010

(19,05 ± 0,25)

2.490 + .000 - .010

(63,25 + .000 - 0,25)

.055 ± .010

(1,40 ± 0,25)

.105 ± .010

(2,67 ± 0,25)

ROW 1

ROW 2

ROW 3

ROW 4

2.690 + .000/

- .010

(68,33 + .000/

- 0,25)

SWITCH KEY

IDENTIFICATION

(FOR REF. ONLY)

.500 ± .010 (12,7 ± 0,25)

(3 EQ. SPS.) TOL. NON-

ACCUM.

.600 ± .010

(15,24 ± 0,25)

.128 ± .010

(3,25 ± 0,25)

.280 ± .010

(7,11 ± 0,25)

.025 ± .002

(0,64 ± 0,05)

SQUARE

TERMINAL

.360 ± .010

(9,14 ± 0,25)

.072

± .010

(1,83

± 0,25)

COL = COLUMN

BUTTON AREAS ARE EMBOSSED

1

2

3

4

5

6

7

8

9 10 11 12

13 14 15 16

.150 ± .005

(3,81 ± 0,13) R.

FEATURES

• Sealed Keyboard

• Colorful Graphic Overlay

• Audible, Snap-Dome Contact

• User Legendable Styles

• 3,000,000 Operations per Button

• Optional Panel Seal Gasket to

Protect Your Equipment

Keypads

33