Portable, Modular Signal Conditioning Modules
NI SCC-RTD01 RTD Input
Specifications
SCC-RTD01
Analog Input
Number of input channels .................. 2 differential
Input range.......................................... ±400 mVDC (fixed gain of 25
on each channel)
Maximum working voltage
(signal + common mode) ................ Each input should remain within
±12 V of ground
Overvoltage protection ....................... ±42 V
pk
/25 VDC (powered on
or off)
Input impedance ................................. 2 MΩ in parallel with 4.7 nF
powered on; 20 kΩ min
powered off
Filter type ............................................ Lowpass 3-pole Butterworth filter
-3 dB cutoff frequency ........................ 30 Hz
System noise....................................... 4.5 µV
rms
(referred to input)
Model
SCC-RTD01
Channel
2
Description
2, 3, or 4-wire Pt RTD
Part Number
777459-18
The National Instruments SCC-RTD01 is a dual-channel module that
accepts 2, 3, or 4-wire platinum RTDs. Each channel of the
NI SCC-RTD01 has an amplifier with a gain of 25 and a 30 Hz lowpass
filter. In addition, the module has a 1 mA excitation source for powering
the RTDs.
Transfer Characteristics
Gain ....................................................
Gain error ............................................
Gain-error temperature coefficient.....
Offset error..........................................
Offset-error temperature coefficient ..
Nonlinearity.........................................
Recommended warm-up time.............
25
±1.2%
±10 ppm/°C
±250 µV RTI
±1.6 µV/°C
10 ppm of full scale
5 minutes (SCC system only)
Amplifier Characteristics
CMRR .................................................. 110 dB at 60 Hz
Output range ....................................... ±10 V
Excitation
Number of channels............................
Constant-current source .....................
Maximum voltage level without
losing regulation.............................
Drift ....................................................
1
1 mA
24 V
±127 ppm/°C
Environment
Operating temperature ....................... 0 to 50 °C
Relative humidity ................................ 5 to 90% noncondensing
Power Requirements
Analog ................................................. 135 mW maximum
Digital.................................................. 153 mW maximum
BUY ONLINE
at
ni.com
or
CALL 800 813 3693 (U.S.)
5
NI [ NATIONAL INSTRUMENTS CORPORATION ]
