Black Box PI405A, Manual, Page: 13 / 19

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DATABUFFER PLUS
Figure 3-2. DataBuffer Plus in a Parallel-to-Serial Application.
3.1 Configuration
The DataBuffer Plus has one output port and one input port. Each serial port
must be configured individually for speed, parity, data format, and handshaking
method.
Table 3-1 lists these settings. The unit is also equipped with Copy/Pause
and Reset buttons on the front panel. The 8-position DIP switches—S3 for the
output port and S4 for the input port—are located on the rear panel of the unit.
The switches are for setting speed, data format, and flow-control options on serial
ports. Parallel ports do not have DIP switches.
S3 controls the output port and S4 controls the input port. Setting S3 or S4 to
the “up” position opens the switch (OFF position); setting S3 or S4 to the “down”
position closes it (ON position).
After you reset S3 or S4, either power down the unit or press the Reset switch
again.
3.2 Self-Test
The DataBuffer Plus also has a self-test feature. To begin the self-test, press and
hold the Reset switch while you press and hold the Copy/Pause switch. Release
Reset, then release Copy/Pause. The unit transmits the test message to the output
port only. The test message continues to print until you press the Reset switch
again.
PC
ECN25C
ECN25C
DataBuffer
Plus
Serial
Printer