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NI SCXI-1121

4-Channel Isolation Amplifier With Excitation

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  • Lowpass filtering
  • Shunt calibration
  • Isolated analog inputs
  • Isolated voltage and current excitation
  • Signal inputs from millivolts to ±250 V
  • NI-DAQmx measurement services software simplifies configuration and measurements


Use the "Configure System" link above to configure an SCXI DAQ system based on this module.

The NI SCXI-1121 and SCXI-1122 modules are designed for a wide variety of sensor and signal inputs requiring isolation. The SCXI-1121 offers independently configurable isolation amplifiers, filters, and excitation sources for each channel. Both modules provide 250 Vrms working isolation and can acquire strain, RTD, thermocouple, millivolt, volt, 250 V, 0 to 20 mA, and 4 to 20 mA current input signals. In addition, they can multiplex their channels into a single channel of the DAQ device, and you can add modules to increase channel count. The SCXI-1121 also offers parallel-mode operation.

An SCXI chassis is required to house the SCXI modules. The NI SCXI-1000 chassis can hold up to four modules while the NI SCXI-1001 can hold up to 12. You can choose NI X Series, M Series, E Series, or S Series DAQ modules for controlling the chassis.

Specifications Documents

Specifications Summary

General
Product Name SCXI-1121
Product Family Signal Conditioning
Form Factor SCXI
Part Number 776572-21
Operating System/Target Real-Time , Linux , Windows
LabVIEW RT Support Yes
Measurement Type RTD , Strain/Bridge-based sensor , Thermocouple , Voltage , Current , Temperature
Isolation Type Ch-Ch Isolation
RoHS Compliant No
Signal Conditioning 0-20 mA current input , Cold-junction compensation , Voltage excitation , Low-pass filtering
Analog Input
Channels 4 , 0
Single-Ended Channels 0
Differential Channels 4
Sample Rate 333 kS/s
Bandwidth 10 kHz
Max Voltage 250 V
Maximum Voltage Range -250 V - 250 V
Minimum Voltage Range -2.5 mV - 2.5 mV
Simultaneous Sampling Yes
Input Impedance 1 GOhm
Available Filters 10 kHz , 4 Hz
Excitation Current 0.15 mA
Bridge Configurations Half Bridge , Full Bridge , Quarter Bridge
Analog Output
Channels 0
Digital I/O
Bidirectional Channels 0
Input-Only Channels 0
Output-Only Channels 0
Counter/Timers
Counters 0
Physical Specifications
Length 20.3 cm
Width 17.3 cm
Height 3 cm
I/O Connector Screw terminals
Minimum Operating Temperature 0 °C
Maximum Operating Temperature 50 °C
Minimum Storage Temperature -20 °C
Maximum Storage Temperature 70 °C
Timing/Triggering/Synchronization
Triggering Digital , Analog
Triggers cDAQ Chassis No
most popular item most popular item(s)
Part Number Description Est Ship  US Dollars Qty
NI SCXI-1121
776572-21most popular item SCXI-1121 4 ch Isolation Amplifier12 - 20$ 1,415.00
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Extended Warranties

National Instruments designs and manufactures all products to minimize failures, however unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase, covering any repair costs for up to three years. In addition, they offer the following benefits:

  • Significant cost savings compared to individual repair incidents
  • Fault location, diagnostics, and repair by NI any time the system product fails
  • All parts and labor costs covered as well as any adjustments needed to restore the hardware to manufacturing specifications

For more information about your warranty options:

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