The National Instruments VXI-AO-48XDC is a DC setpoint module for VXIbus systems delivering precise analog and digital control. It combines 48 independent voltage output channels and 48 independent current output channels with 18-bit D/A resolution, plus 32 bidirectional digital I/O lines. The module integrates voltage generation, current sourcing, and TTL-compatible digital I/O into a single VXI form factor, making it suitable for automated test equipment, industrial process control, electronic instrumentation, and machine automation.
Technical Specifications
• Analog Output Channels: 48 voltage outputs, 48 current outputs
• Resolution: 18-bit D/A for all analog outputs
• Current Output: High-compliance 0–20 mA source capability
• Digital I/O: 32 bidirectional lines, configurable as four 8-bit TTL-compatible ports, independently configurable as input or output
• VXIbus Interface: Logical address default 5; 64 bytes configuration space in upper 16 KB A16 address space
• Connectors: 96-pin DIN header (digital I/O)
• Power: VXIbus mainframe supplied
• Calibration: Software-based with factory calibration data stored on onboard EEPROM nvRAM
– Key Features
• Dual-mode analog output supports both voltage and current generation independently
• Programmable DC voltage and current levels with 18-bit precision
• TTL-compatible bidirectional digital I/O for relay, LED, and optically isolated solid-state relay interfacing
• Software-calibrated design eliminates manual calibration overhead
• VXIplug&play driver support with VISA integration
– Typical Applications
• Automated test equipment (ATE) and electronic test systems
• Industrial process monitoring and control
• Machine automation and electromechanical control
• Experimental stimulus generation and analog function synthesis
• Interface to relay racks and I/O modules
– Compatibility & Integration
The module operates within VXIbus architectures and supports LabVIEW, LabWindows/CVI, ComponentWorks, NI-DAQ, NI-VISA, and VirtualBench environments. VXIplug&play instrument drivers or NI-DAQ driver software accessed through VISA provide command and control.
