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Connecting Signal Sources to Analog Inputs
For detailed information about connections from floating or
ground-referenced signal sources to analog inputs, refer to your device
documentation.
Refer to the SCB-68 User Manual for Advanced Functions for more
information about using the temperature sensor, taking thermocouple
measurements, and adding bias resistors and signal conditioning components
to the SCB-68.
Fuse and Power Information
Some DAQ devices provide +5 V power on pin 8 and pin 14. Pin 8 from the
DAQ device is protected by an 800 mA, 250 V, 5 · 20 mm fuse on the SCB-68,
shown in Figure 2. Shorting pin 8 to ground blows the fuse on the SCB-68.
Pin 14 is not fuse-protected on the SCB-68. Shorting pin 14 will cause the
fuse on the DAQ device to open.
If the SCB-68 does not work when you power on the DAQ device, check the
switch settings, then check the fuse on the SCB-68, shown in Figure 2, and
the output fuse (if any) on the DAQ device. Littelfuse part number 235.800
(
www.littelfuse.com) is a suitable replacement fuse. Before replacing
any fuses, check for short circuits from power to ground.
Refer to the SCB-68 User Manual for Advanced Functions for information
about filtering the power on the SCB-68.
Where to Go from Here
Refer to the SCB-68 User Manual for Advanced Functions, available from
ni.com/manuals, for information about the temperature sensor,
thermocouple measurements, bias resistors, soldering components on the
SCB-68, filtering, current input measurements, and accessory specifications.
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