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参数资料
| 型号： | 88-152 |
| 厂商： | Grayhill Inc |
| 文件页数： | 4/5页 |
| 文件大小： | 0K |
| 描述： | KEYBOARD OVERLAY |
| 产品培训模块： | Keypads |
| 标准包装： | 1 |
Sealed Keypads
SPECIFICATIONS
Rating Criteria
Materials and Finishes
Rating at 24 Vdc: 10 milliamps, resistive
Contact Resistance: Compatible with MOS, TTL
and DTL (10 ohms maximum)
Voltage Breakdown: 250 Vac between mutually
insulated parts
Life Expectancy: 3,000,000 operations per
button
STANDARD LEGENDS
Colorful graphic overlays are polyester with a
tough acrylic bond to provide maximum
protection against dirt and moisture. Second
surface printed, the overlay wipes clean and
Contact Bounce: Less than 4 milliseconds at
make, 10 milliseconds at break
Temperature: -40°C to +80°C
Operating Features
Button Travel: 0.015"(0,38 mm) nominal total
travel
Typical Operating Force: 350 grams
continues to look bright and bold throughout the
keyboard life. Available through distributors. For
instant custom legends, order separate blank
keyboards as indicated in the Ordering
Housing: ABS polycarbonate, black
Graphic Overlay: Polyester
Contact Dome: Stainless steel, selectively gold-
plated
Terminals: Phosphor bronze
Information section and choose one of the
clear window overlays below; then order a
sheet of legend inserts. Or, if you prefer, order
the keyboard custom printed by Grayhill; see
Ordering Information.
-143
-152
-172
88-101
88AB2,
88AC2
-052
-252
-072
-262
-082
88-001
88-201
88BB2,
88BC2
88JB2, 88JC2
SEALING OF KEYBOARDS
The graphic legend is silk-screen printed on
the second surface of a clear polyester film,
providing maximum legend protection. It
withstands high humidity, and it is resistant to
scratching, marring, and dulling of the surface
caused by fingernails, wiping cloths, and
cleaning materials. It has excellent solvent
resistance to water, petroleum oil, alcohols
and aliphatic hydrocarbons.
These common liquids do not attack the
overlay: 5% acetic acid, 5% citric acid, 2%
detergent solution, soapy water, 30% hydrogen
peroxide, wine, beer, whiskey, coffee, cocoa,
milk, tomato juice, lemon juice, etc.
Hydrocarbons, ketones and freon do not affect
the overlay. But, we recommend that you do not
subject the keyboard to these chemicals, since
they may affect the switch housing, which is
ABS plastic. To discuss a particular solvent,
contact Grayhill.
Protect your equipment in outdoor or harsh
environmental conditions by sealing the
keyboard to the equipment panel. Use an
optional gasket with the keyboard. There are
two types of gaskets: one for mounting the
keyboard beneath the panel, and one for
mounting it above the equipment panel. See
Panel Seal Gaskets.
The contact system is internally sealed by a
special adhesive backed sheet that holds the
domes in position on the PC board.
Grayhill, Inc. ? 561 Hillgrove Avenue ? LaGrange, Illinois
60525-5997 ? USA ? Phone: 708-354-1040 ? Fax: 708-354-2820 ? www.grayhill.com
Keypads
35
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