TBX-1328 Installation Guide
10
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Electromagnetic Compatibility
Emissions................................................EN 55011 Class A at 10 m
FCC Part 15A above 1 GHz
Immunity ................................................EN 61326:1997 + A2:2001,
Table 1
EMC/EMI ...............................................CE, C-Tick and FCC Part 15
(Class A) Compliant
Note
For EMC compliance, operate this device with shielded cabling.
CE Compliance
The TBX-1328 meets the essential requirements of applicable European
Directives, as amended for CE marking, as follows:
Low-Voltage Directive (safety)..............73/23/EEC
Electromagnetic Compatibility
Directive (EMC) .....................................89/336/EEC
Note
Refer to the Declaration of Conformity (DoC) for this product for any additional
regulatory compliance information. To obtain the DoC for this product, click
Declarations
of Conformity Information
at
ni.com/hardref.nsf/
.
Temperature Measurement Considerations
The TBX-1328 provides high-accuracy temperature measurements for
isolation modules such as the SCXI-1120/D, SCXI-1121, and SCXI-1125.
The TBX-1328 provides connectivity to thermocouples, thermistors,
and RTDs.
The TBX-1328 provides high-accuracy thermocouple measurements using
an onboard cold-junction compensation (CJC) sensor. To find out how to
read the CJC, refer to the documentation for the module in use.
Temperature measurements with thermistors and RTDs require excitation.
The TBX-1328 provides excitation connectivity when used with an
SCXI-1121. Refer to the
SCXI-1121 User Manual
for more information on
connecting thermistors and RTDs to the excitation channels.
Switch S1 switches the temperature sensor output between MTEMP
(multiplexed mode) and DTEMP (parallel mode) modes. In either mode, if
there are temperature variations, the measurements can be less accurate. In
MTEMP mode, you must scan the temperature independently of the other