The National Instruments PCI-6704 is a 16-bit, 32-channel static analog output board for precision voltage and current signal generation in automated test and measurement systems. It combines 16 voltage output channels (±10 V) with 16 current output channels (0 to 20 mA), delivering high-resolution control with ±1 mV voltage accuracy and ±2 µA current accuracy. The board integrates 8 digital I/O lines and operates via software-timed updates, making it suitable for stable, repeatable signal generation in control and instrumentation applications.
Technical Specifications
• Model: PCI-6704 (Part Numbers: 777306-01, 183689-01)
• Bus Interface: PCI
• Analog Output Channels: 32 total (16 voltage + 16 current)
• Resolution: 16 bits
• Voltage Output: ±10 V (max range –10.1 V to +10.1 V), ±1 mV accuracy
• Current Output: 0 to 20 mA (control limit 0.1 to 20.2 mA), ±2 µA accuracy
• Digital I/O: 8 lines, 5 V TTL/CMOS logic
• I/O Connector: 68-pin male (compatible with NI SCB-68 shielded connector block)
• Current Sinks: 3 (PCI)
• Power: 5 VDC fused supply from PCI/PXI bus
• Dimensions: 3.9 × 6.9 inches (9.9 × 17.5 cm)
• Operating Temperature: 0 to 55 °C
• Storage Temperature: –20 to 70 °C
• Humidity: 5 to 90% RH (non-condensing)
– Key Features
• User-defined power-up states
• Static output mode for stable signal control
• Supports multiple current sink configurations
• Measurement Category I rated; not suitable for Categories II, III, or IV
• Compact form factor for space-constrained systems
– Software & Integration
The board operates with NI-DAQmx driver software and legacy Traditional NI-DAQ. Supported development environments include LabVIEW, LabWindows/CVI, ANSI C, C#.NET, Python, MATLAB, Visual Basic, and Visual Studio/.NET.
– Compatibility
• Operating Systems: Windows 2000/XP, Windows Vista (x86/x64), Real-Time OS (with LabVIEW)
• Chassis: CompactPCI systems (PICMG CompactPCI 2.0 compliant)
• Recommended Accessory: NI SH68-68-D1 shielded cable
