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NI SCXI-1581

32-Channel Current Excitation Module

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  • 32 channels of 100 µA current excitation sources
  • ±0.05% accuracy for each current source
  • 5 ppm/°C maximum temperature drift
  • Use with NI SCXI-1102 module for high-channel-count RTD measurements
  • NI-DAQmx measurement services software to simplify configuration and measurements


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

The NI 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. This module is ideal in any application that requires 100 µA fixed-current excitation, such as resistive temperature devices (RTDs). You can use the SCXI-1581 with the NI SCXI-1102 thermocouple/voltage input module to create a high-channel-count RTD measurement system.

The NI SCXI-1600 USB DAQ module can be used 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 NI SCXI-1000 chassis is capable of holding up to four modules while the NI SCXI-1001 can hold up to 12. The SCXI-1600 module can be used only with 32-bit OSs. For 64-bit systems, you can use NI X Series, M Series, E Series, or S Series DAQ modules for control.

Specifications Documents

Specifications Summary

General
Product Name SCXI-1581
Product Family Signal Conditioning
Form Factor SCXI
Part Number 777966-81
Operating System/Target Real-Time , Linux , Windows
LabVIEW RT Support Yes
Measurement Type Current
RoHS Compliant No
Analog Input
Channels 0
Single-Ended Channels 0
Differential Channels 0
Analog Output
Channels 32
Output Type Sourcing
Maximum Current Range 0 µA - 100 µA
Digital I/O
Bidirectional Channels 0
Input-Only Channels 0
Output-Only Channels 0
Counter/Timers
Counters 0
Physical Specifications
Length 18.8 cm
Width 17.2 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
Triggers cDAQ Chassis No
Part Number Description Est Ship  US Dollars Qty
NI SCXI-1581
777966-81SCXI-1581 32 ch, 100 uA Current Excitation Module12 - 20$ 2,475.00
Accessories
777687-00SCXI-1300 Low-Voltage Screw Terminal Block, Cast10 - 15$ 261.00
777687-10SCXI-1310 96-Pin Connector and Shell Assembly12 - 20$ 101.00
777508-01BNC-2095 32-Channel BNC Connector12 - 20$ 570.00
777264-01TBX-96 DIN-Rail Mountable Connector Blocks12 - 20$ 228.00
183228-01SH96-96 Shielded Cable, 1 m5 - 10$ 227.00
183228-02SH96-96 Shielded Cable, 2 m5 - 10$ 289.00
183425-01R96-96 Ribbon Cable, 1 mCall$ 275.00
183425-02R96-96 Ribbon Cable, 2 mCall$ 238.00

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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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Repair Services

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