Denso QS20H, Руководство пользователя

Страница: 16 / 41

6
Chapter 2. Connecting the QS20H to the PC
■
Connection precautions
• Use a sufficient length of wiring for the interface cable or AC adapter cable.
• Do not let the interface cable or AC adapter cable run along the floor.
• Do not walk on or hook cables, as this could scratch them.
• When connecting or disconnecting the interface cable or DC power jack,
hold the connector housing and carefully plug or unplug it.
• Do not apply power exceeding 10 VDC to the DC power jack.
■
Precautions in installation
• Do not set up the QS20H in any of the following environments:
- in places exposed to direct sunlight
- near any heating equipment
- in extremely hot and humid areas
- in extremely cold areas such as in refrigerators
Under the above environmental conditions, the code scanner circuitry or
optical components might not operate normally.
• Do not set up the QS20H anyplace where it may be exposed to water.
Water will get into the QS20H, damaging the scanner.
• Do not set up the QS20H in the vicinity of machinery that could generate
high frequencies.
High frequencies may cause the QS20H to malfunction.
• Do not set up the QS20H in places where it may be subjected to excessive
dust or conductive dust (e.g., carbons or metallic powders).
Electrical insulation failures may occur, resulting in a broken scanner.
• Take care not to drop the QS20H during installation work.
Dropping or bumping the QS20H against a solid object may result in a
broken housing or internal failure.
• Do not set up the QS20H in places where it may be subject to vibration,
e.g., on machinery or belt conveyers.
Vibration may cause the QS20H to break.