NCR 5932, Руководство пользователя

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2-2 Chapter 2: Installation
Transit Range
Condition Range
Temperature
-40° to 60°C (-40
°
F to 140
°
F)
Temperature Change 20°C (36
°
F) per hour max.
Relative Humidity 5% to 95%
Condensation may occur when equipment is transferred from cold to
warm areas during shipment. If flash condensation has occurred, only
operate the keyboard after the equipment has dried and been stabilized
to the operating environment.
Electrical Environment
The electrical environment required for the keyboard module is listed
as follows.
Parameter Symbol Min Max
Supply voltage to keyboard VIN 4.75V 5.25v
Supply current to keyboard I
IN
500 mA
Supply voltage to USB Port VOUT 4.75V 5.5V
Supply current to USB Port IOUT 100mA
Note:
The user programmable speaker tone function on the USB
keyboards is not supported when the keyboard is connected to a
standard PC. The standard PC keyboard voltage tolerance is not
sufficient to handle the extra power requirements of the programmable
speaker tone. Only the default keyclick and error tones are supported
on a PC.
Caution: Be sure to turn off your PC or retail workstation BEFORE
you plug in the keyboard. “Hot plugging” can result in damage to your
PC due to the increased power requirements of the USB keyboards.