Symbol SE 923, Руководство по интеграции

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2-5
Installation
Installing the SE-923-I000A
Before installing the SE-923-I000A into your host equipment, there are two important points
to consider:
•
The SE-923-I000A chassis is electrically connected to V
cc
. It must be isolated from
ground.
•
Use only non-magnetic screws (i.e. stainless steel 300 Series screws), or locating pins
when mounting the SE-923-I000A. Magnetic screws, or pins may cause the motor/
mirror neutral position to change. Recommended screw torque is 1.0 kg-cm.
•
Do not place any magnetic material (i.e. dynamic speakers, ringers, vibrators, etc.)
within 1 inch of the SE-923-I000A chassis.
Considerations
Housing Design
The scan engine housing design must be such that internal reflections from the outgoing laser
beam are not directed back toward the detector. The reflections from the front corners of the
scan engine housing near the exit window and from the window itself can often be
troublesome. Also, for particular window tilt angles, reflections from the window can bounce
off the top or bottom of the housing and reach the detector.
In addition to these minimum dimensional requirements, the designer may want to consider
the use of baffles, matte-finished dark internal housing colors, as well as anti-reflection coated
windows (if needed). Refer to
Positioning the Window on page 2-6 for more information on
exit window orientation.
Grounding
The SE-923 chassis is at
V
CC
. If you are installing the SE-923 to a grounded host, you must
isolate the two. An insulator can be inserted between the two chassis, and if metallic (non-
magnetic) screws are used, shoulder washers must be used to isolate the screws from the host.
Non-metallic screws may also be used if mechanical considerations permit.
ESD
The SE-923-I000A is protected from ESD events that may occur in an ESD-controlled
environment. Always exercise care when handling the module. Use grounding wrist straps
and handle in a properly grounded work area.