NI PXI-7344 PXI MOTION CONTROL MODULE

The PXI-7344 is a mid-range PXI motion control module launched by National Instruments (NI), belonging to the 7340 series. It is specifically designed for industrial automation, test and measurement, and equipment manufacturing scenarios requiring precise multi-axis motion control. It supports 4-axis stepper/servo motor control and integrates advanced functions such as 3D interpolation, contour control, and electronic gearing. When paired with NI-Motion driver software and programming environments like LabVIEW, it enables rapid implementation of complex motion trajectory planning, providing machine manufacturers and end-users with an efficient and reliable motion control solution.

Data Download:

NI PXI-7344 Datasheet.pdf

NI PXI-7344 Manual.pdf

Core Functions and Application Scenarios

The PXI-7344 module features multi-axis coordination and high-precision control as its core advantages, covering full-scenario requirements from simple point-to-point motion to complex contour control. Its specific functions and applications are as follows:

Multi-axis Motion Control Capability

It supports 4-axis independent or coordinated control, with each axis flexibly configurable to stepper or servo mode to meet different power demands. It has built-in linear, circular, spherical, and helical interpolation functions, enabling complex 3D spatial trajectory motion. It is suitable for scenarios such as precision machining, robot joint control, and automated assembly lines.

Advanced Motion Trajectory Optimization

Equipped with S-curve acceleration/deceleration and trajectory blending functions, it reduces motion impact and improves equipment operational stability. It supports electronic gearing and contouring, enabling master-slave axis synchronous motion. It is applicable to equipment with high motion synchronization requirements, such as printing machines, cutting machines, and placement machines.

Closed-loop Control and Feedback Adaptation

It supports closed-loop stepper control and servo control, compatible with quadrature incremental encoders (maximum input rate of 20 MHz) to collect real-time position feedback signals and ensure motion precision. It is equipped with 4 channels of 12-bit analog input (±10 V range), which can access sensor signals for closed-loop regulation or status monitoring.

Hardware Performance and Technical Parameters

The PXI-7344 is designed based on the PXI bus architecture, with hardware configurations balancing high precision, high speed, and stability. Its core technical parameters are as follows:

1. Core Performance Parameters

• Motion Control: Compatible with 4-axis stepper/servo systems. The PID loop update rate is as low as 62.5 µs per axis, with a 4-axis coordinated update rate of 250 µs. The multi-axis synchronization error is less than 1 update cycle.
• Signal Output: Maximum stepping pulse output rate of 4 MHz (supports full-step, half-step, and micro-step modes); 16-bit D/A converter (±10 V output, 0.000305 V/LSB resolution); 2 channels of static PWM output (32 kHz).
• I/O Interfaces: 32-bit configurable digital I/O (4×8-bit TTL ports, supporting 24 mA sink/source current); 12 dedicated inputs (3 per axis, including positive, negative, and origin signals); 4 programmable breakpoint outputs; 4 axis enable/disable outputs.
• Feedback and Acquisition: Maximum encoder input rate of 20 MHz; 4 channels of 12-bit analog input (50 µs scanning rate); supports high-speed capture function for accurate recording of trigger event positions.

2. System Compatibility and Expansion

• Bus Interface: Standard PXI bus, compatible with PXI chassis; supports RTSI synchronization, enabling precise timing synchronization with NI data acquisition (DAQ) modules.
• Power Requirements: Operating voltage of +5 V (±3%, 1 A) and ±12 V (±3%, 30 mA each); maximum power consumption of 5.7 W, suitable for industrial field power environments.
• Physical Dimensions: 17.5×9.9 cm (6.9×3.9 in.); connector-less design saves space in PXI chassis and facilitates multi-module integration.

Hardware Performance and Technical Parameters

The PXI-7344 is designed based on the PXI bus architecture, with hardware configurations balancing high precision, high speed, and stability. Its core technical parameters are as follows:

1. Core Performance Parameters

• Motion Control: Compatible with 4-axis stepper/servo systems. The PID loop update rate is as low as 62.5 µs per axis, with a 4-axis coordinated update rate of 250 µs. The multi-axis synchronization error is less than 1 update cycle.
• Signal Output: Maximum stepping pulse output rate of 4 MHz (supports full-step, half-step, and micro-step modes); 16-bit D/A converter (±10 V output, 0.000305 V/LSB resolution); 2 channels of static PWM output (32 kHz).
• I/O Interfaces: 32-bit configurable digital I/O (4×8-bit TTL ports, supporting 24 mA sink/source current); 12 dedicated inputs (3 per axis, including positive, negative, and origin signals); 4 programmable breakpoint outputs; 4 axis enable/disable outputs.
• Feedback and Acquisition: Maximum encoder input rate of 20 MHz; 4 channels of 12-bit analog input (50 µs scanning rate); supports high-speed capture function for accurate recording of trigger event positions.

2. System Compatibility and Expansion

• Bus Interface: Standard PXI bus, compatible with PXI chassis; supports RTSI synchronization, enabling precise timing synchronization with NI data acquisition (DAQ) modules.
• Power Requirements: Operating voltage of +5 V (±3%, 1 A) and ±12 V (±3%, 30 mA each); maximum power consumption of 5.7 W, suitable for industrial field power environments.
• Physical Dimensions: 17.5×9.9 cm (6.9×3.9 in.); connector-less design saves space in PXI chassis and facilitates multi-module integration.

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