NI SCC-RTD01 RTD Input

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.

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 .......................

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.......................................

Transfer Characteristics

Gain ....................................................

25

Gain error ............................................

±1.2%

Gain-error temperature coefficient.....

±10 ppm/°C

Offset error..........................................

±250 µV RTI

Offset-error temperature coefficient ..

±1.6 µV/°C

Nonlinearity.........................................

10 ppm of full scale

Recommended warm-up time.............

5 minutes (SCC system only)

Amplifier Characteristics

CMRR ..................................................

110 dB at 60 Hz

Output range .......................................

±10 V

Excitation

Number of channels............................

1

Constant-current source .....................

1 mA

Maximum voltage level without

losing regulation.............................

24 V

Drift ....................................................

±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

Portable, Modular Signal Conditioning Modules

5

BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)

Model

Channel

Description

Part Number

SCC-RTD01

2

2, 3, or 4-wire Pt RTD

777459-18