National Instruments PCI-6533 (PCI-DIO-32HS)

The National Instruments PCI-6533 (PCI-DIO-32HS) is a 32-bit digital I/O interface card for PCI systems delivering high-speed pattern I/O and flexible data acquisition. It provides 32 individually configurable digital lines grouped into four 8-bit ports, supporting independent configuration as inputs or outputs. The card employs the NI MITE PCI interface with bus-master operation and DMA for continuous data streaming, making it suitable for industrial machine control, automated test equipment, and laboratory instrumentation.

– Technical Specifications

• Digital I/O Channels: 32 lines, individually configurable as input or output
• Port Grouping: Four 8-bit ports configurable as two 16-bit, two 8-bit, or one 32-bit for handshaking or pattern I/O
• Pattern I/O Transfer Rate: Up to 2 MHz
• Logic Levels: 5 V TTL/CMOS compatible. Input high: 2 V to 5 V; input low: 0 V to 0.8 V; absolute maximum: –0.3 V to 5 V
• Output Drive: 24 mA sink or source per line
• Input Hysteresis: 500 mV
• Data Buffer: 16-sample-deep FIFO
• Triggering: Start/stop triggering, pattern match/mismatch detection on user-defined lines, digital pattern and edge triggers (minimum pulse width 10 ns)
• Host Interface: PCI (5 V, 32-bit)
• I/O Connector: Single 68-pin male SCSI-II connector
• Power Supply: +5 VDC (±5%); +4.65 V to +5.25 VDC at 1 A available at I/O connector
• Input Current (Data Lines): Low (0.4 V): –70 μA to –10 μA; High (2.4 V): 10 μA to 40 μA
• Input Current (Control Lines): Low (0.4 V): –2.5 mA to –200 μA; High (2.4 V): 200 μA to 1.4 mA
• Pull-up/down Resistors: CTRL PULL 2.2 kΩ; DATA PULL 100 kΩ
• Power-on State: High-impedance with selectable pull-up or pull-down for output channels

– Key Features

• Diode-terminated inputs for signal damping at TTL levels
• Independent power-on state control for data and control lines
• RTSI bus and PXI trigger bus synchronization support
• Bus-master DMA operation for sustained transfers without CPU intervention

– Typical Applications

• Industrial automation and machine control
• Automated test equipment (ATE)
• Real-time measurement and control systems
• Laboratory instrument interfacing