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SCXI-1321 Terminal Block Installation Guide 6 ni.com
Note To minimize the temperature gradient inside the terminal block, move the SCXI
chassis away from any extreme temperature differential.
Specifications
All specifications are typical at 25 °C unless otherwise specified.
Electrical
Cold-junction sensor
Accuracy
1
........................................0.9 °C
Output..............................................10 mV/°C from 0 to 55 °C
Resistors
R
SHUNT
.............................................301 kΩ ±1%
R
NULL
...............................................39 kΩ ±5%
R
TRIM
...............................................10 kΩ
Nulling potentiometer
Range...............................................0 to 10 kΩ
Step size...........................................infinite (user adjustable)
Mechanical
Resistor sockets
Connecting lead size........................0.023 to 0.026 in.
Connecting lead length....................0.110 to 0.175 in.
Lead spacing....................................0.500 in.
Maximum Working Voltage
Maximum working voltage refers to the signal voltage plus the
common-mode voltage.
Channel-to-earth .....................................300 V, Installation Category II
Channel-to-channel.................................300 V, Installation Category II
1
The temperature sensor accuracy includes tolerances in all component values caused by temperature and loading,
and
self-heating.