Black Box ME801-C, Руководство пользователя

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CHAPTER 3: Configuration
3. Configuration
Before you install a pair of SHM-B Sync units, you
should set their configuration jumpers as necessary.
CAUTION!
If you have the card version, make very sure that the
SHM-B Sync card is not installed in a powered chassis
when you configure it. If you have the standalone version,
make sure that it is unplugged and is disconnected from
any other devices. No voltages greater than 17 VAC are
ever present on the board even when it is powered, but the
possibility of electric shock should always be avoided.
When you handle the SHM-B Sync’s circuit board, take
every reasonable precaution against damaging the board
with static electricity. At the very least, discharge yourself
by touching a fixed metal surface before handling the
board; if possible, stand on an anti-static mat and wear a
grounding strap or anti-static gloves.
There are two sets of jumper posts mounted on the
SHM-B Sync’s circuit board:
• Six pairs of posts are used to set the SHM-B Sync’s
data rate. They’re at the front of the left-hand side
of the board (the ones labeled “DATA-RATE
SELECTION” in Figure 3-1). The six possible data-
rate settings are 600, 1200, 2400, 4800, 9600, and
19,200 bps. The factory-default value is 9600 bps; if
your RS-232 equipment is using one of the other
data rates, set the jumpers in both units accordingly
by moving the jumper to the appropriate pair of