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NI SCXI-1581

32-Channel Current Excitation Module

  • 32 channels of 100 µA current excitation sources
  • Use with SCXI-1102 module for high-channel-count RTD measurements
  • ±0.05% accuracy for each current source
  • NI-DAQmx Measurement Services software to simplify configuration and measurements
  • 5 ppm/°C maximum temperature drift
  • SCXI-1600 (USB) is recommended for controlling this module; also compatible with M Series
Data Sheet  |   Configure System popup

Use SCXI Advisor to configure an SCXI data acquisition system based on this module.

The National Instruments SCXI-1581 provides 32 channels of 100 µA current excitation. The high accuracy and stability of these current sources make them especially well suited for measuring resistance with a high degree of accuracy. The module is ideal in any application that requires a 100 µA fixed current excitation, such as resistive temperature devices (RTDs). You can use the SCXI-1581 with the SCXI-1102 to create a high-channel-count RTD measurement system.

The SCXI-1600USB data acquisition module can be used in conjunction with this module to create a completely plug-and-play USB data acquisition system. An SCXI chassis is required to house the SCXI-1600 and assorted SCXI modules for a particular system. The SCXI-1000 chassis is capable of holding up to four modules while the SCXI-1001 can hold up to 12.

Part Number Description Est Ship  US Dollars Qty
NI SCXI-1581
777966-81SCXI-1581 32 ch, 100 uA Current Excitation Module12 - 20$ 2,099.00
Accessories
777687-00SCXI-1300 Low-Voltage Screw Terminal Block, Cast10 - 15$ 219.00
777687-10SCXI-1310 96-Pin Connector and Shell Assembly12 - 20$ 79.00
777508-01BNC-2095 32-Channel BNC Connector12 - 20$ 479.00
777264-01TBX-96 DIN-Rail Mountable Connector Blocks12 - 20$ 189.00
183228-01SH96-96 Shielded Cable, 1 m5 - 10$ 209.00
183228-02SH96-96 Shielded Cable, 2 m5 - 10$ 259.00
183425-01R96-96 Ribbon Cable, 1 m12 - 20$ 119.00
183425-02R96-96 Ribbon Cable, 2 mCall$ 199.00

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Specifications Documents


Specifications Summary

General 
Form FactorSCXI
Operating System / TargetWindows, Real-Time, Linux
Measurement TypeCurrent
LabVIEW RT SupportYes
Analog Input 
Number of Channels0
Analog Output 
Number of Channels32
Output TypeSourcing
Maximum Current Range0..100 uA
Digital I/O 
Number of Channels0
Counter/Timers 
Number of Counter/Timers0
Timing/Triggering/Synchronization 
Triggers cDAQ ChassisNo

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  • 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

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