Overview
The National Instruments PCI-7314 is a high-performance PCI stepper motor motion controller designed for four-axis motion control applications. This card installs directly into a +5 V PCI expansion slot and provides software-programmable control for stepper motors with support for event-based motion profiling, velocity profiling, and point-to-point positioning. The PCI-7314 is ideal for precision positioning, robotics projects, and industrial automation tasks requiring reliable, repeatable stepper motion control.
Key Features
- 4-Axis Control: Software-programmable control for up to four independent stepper motor axes with customizable motion profiles.
- Motion Modes: Event-based motion profiling, velocity profiling, and point-to-point positioning with fixed-velocity control mode.
- Stepping Support: Compatible with half-step, full-step, and micro-stepping applications for fine-grained motor control.
- Open-Loop Operation: Designed for open-loop mode only—no feedback requirement, simplifying implementation.
- Digital I/O: 24-bit digital I/O port via 68-pin VHDCI connector for home and limit switch integration and general-purpose signals.
- Easy Programming: ValueMotion software and simple API for integration with Visual Basic, C, and other languages.
Technical Specifications
- Maximum Step Frequency: 750,000 steps per second per axis
- Maximum Encoder Frequency: 1 MHz
- Input Voltage Range: 0 to 12 V
- Output Voltage Range: 0 to 5 V
- Power Consumption: 6 W
- Power Requirements: +5 V, +12 V, and –12 V (from PCI bus)
- Digital I/O: 24-bit via 68-pin VHDCI connector
- Connector Type: 68-pin high-density female VHDCI
- Interface: PCI (Peripheral Component Interconnect)
- Operating Mode: Open-loop only
- Axes Supported: 4 independent motion axes
Typical Applications
- Industrial automation and process control systems
- Precision positioning and multi-axis motion control
- Robotics and automated assembly equipment
- Test and measurement systems requiring programmable stepper control
- Custom data acquisition and motion profiling systems
- Legacy system integration and replacement for existing PCI-7314 installations
Compatibility & Replacements
Compatible With
- Windows-based PCI computer systems with +5 V PCI expansion slots
- Standard stepper motors with step-direction control interface
- Home and limit switch inputs via digital I/O
- General-purpose I/O control and monitoring
Replaces / Drop-In Replacement For
- Original National Instruments PCI-7314 installations
- Legacy 4-axis stepper motion control systems requiring PCI interface
Works With
- NI ValueMotion software and application framework
- NI FlexMotion API (legacy support)
- Visual Basic, C, and other programming languages via DLL integration
- Windows-based industrial control software
- Standard PCI-compatible driver stack
