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© National Instruments
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1-3
Setting up the SCB-68A
The following cautions contain important safety information concerning hazardous voltages and
connector blocks.
Safety Cautions
Do
not
connect hazardous voltages (>30 V
rms
/42 V
pk
/60 VDC).
Refer to your device documentation for information about the electrical limits of your
device.
Install cover prior to use. To avoid electrical shock, do
not
remove SCB-68A covers
unless you are qualified to do so. Before removing the cover, disconnect any live
circuit from the connector block. Replace cover for use.
The chassis ground lug on your SCB-68A is for grounding high-impedance sources,
such as a floating source (1 mA maximum). Do
not
use the chassis ground lug as a
safety earth ground.
EMC Caution
To ensure the specified EMC performance, operate this product only
with shielded cables.
Figure 1-2 shows the SCB-68A PCB parts locator diagram.