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7.1 Calling Black Box
If you determine that your RS422/485 Serial Interface Plus is malfunctioning,
do not attempt to alter or repair the unit. It contains no user-serviceable
parts. Contact Black Box Technical Support at 724-746-5500.
Before you do, make a record of the history of the problem. We will be able
to provide more efficient and accurate assistance if you have a complete
description, including:
• the nature and duration of the problem.
• when the problem occurs.
• the components involved in the problem.
• any particular application that, when used, appears to create the problem
or make it worse.
7.2 Shipping and Packaging
If you need to transport or ship your RS422/485 Serial Interface Plus:
• Package it carefully. We recommend that you use the original container.
• If you are shipping the Serial Interface Plus for repair, make sure you
include its power supply. If you are returning the Serial Interface Plus,
make sure you include this manual as well. Before you ship, contact Black
Box to get a Return Materials Authorization (RMA) number.
CHAPTER 7: Troubleshooting