Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | PCI-6733 |
| Manufacturer | National Instruments |
| Part Number | 778510-01 |
| Product Type | Analog output DAQ board |
| Host Interface | PCI |
| Analog Output Channels | 8 |
| Analog Output Resolution | 16 bits |
| Analog Output Range | ±10 V with internal reference; external reference operation also supported |
| Maximum Update Rate | 1 MS/s |
| Maximum Eight-Channel FIFO Update Rate | 740 kS/s |
| Maximum Eight-Channel Host-Memory Update Rate | 769 kS/s |
| Digital I/O | 8 lines |
| Digital Logic | 5 V TTL/CMOS compatible |
| Counter/Timers | 2 |
| Counter Resolution | 24 bits |
| Counter Maximum Frequency | 20 MHz |
| FIFO Buffer | 16,384 samples |
| I/O Connector | 68-pin connector |
| Analog Inputs | Not supported |
| Operating Temperature | 0°C to 50°C, as listed by a distributor; confirm the applicable NI specification |
| Recommended Replacement | 785822-01 |
The 1 MS/s figure is the maximum update rate, not a guaranteed simultaneous eight-channel continuous rate. NI’s specifications give lower eight-channel rates depending on whether local FIFO or host PC memory is used.
Product Introduction
NI PCI-6733 High-Speed Analog Output Board
The National Instruments PCI-6733 is an eight-channel, 16-bit analog output board designed for PCI-based data acquisition and automated test systems. It generates voltage waveforms with update rates up to 1 MS/s and includes eight TTL/CMOS digital I/O lines and two 24-bit counter/timers. Typical applications include waveform generation, stimulus-response testing, and multi-phase signal simulation.
PCI-6733
The board supports programmable analog output operation with internal or external reference selection. Engineers should distinguish its maximum single-channel update rate from its lower eight-channel continuous rates when designing waveform systems. It does not provide analog input channels, so it is unsuitable as a direct replacement for a multifunction DAQ board that must acquire analog signals.
Application Scenarios & Field Pitfalls
The PCI-6733 is used in systems that need controlled analog signal generation rather than analog measurement. In a legacy test station, replacing this board with a visually similar DAQ card can introduce timing differences, output-range mismatches, or software incompatibility. The critical checks are the required channel count, waveform update rate, PCI compatibility, and driver support.
Typical application scenarios
- Automated test equipment: Generates programmable voltage stimulus signals for electronic device testing.
- Waveform generation: Produces sine, square, sawtooth, and custom waveforms for laboratory and production test systems.
- Power-system simulation: Generates coordinated analog reference signals for multi-phase simulation setups.
- Control-system prototyping: Provides analog command signals for testing controllers and external equipment.
Engineering checks before replacement
- Confirm the host bus. PCI-6733 is a conventional PCI board, not a PCI Express card. Check the computer’s slot type and motherboard compatibility.
- Calculate the required update rate. The 1 MS/s maximum should not be interpreted as an eight-channel continuous rate. For eight channels, NI specifies 740 kS/s using local FIFO and 769 kS/s using host memory under the documented test conditions.
- Verify the voltage reference. The output range depends on the selected reference. Confirm whether the application uses the internal ±10 V reference or an external reference.
- Check connector and pin assignments. The board uses a 68-pin I/O connector. Verify the cable, terminal accessory, and signal grounding arrangement before reconnecting field wiring.
- Review software compatibility. Check the installed NI-DAQ driver, LabVIEW version, operating system, and application code. A replacement board may require changes to device configuration or driver support.
- Do not confuse output with acquisition. PCI-6733 has no analog input channels. If the test system requires voltage measurement, a separate input device is needed.
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Related Products
- PCI-6731: Four-channel, 16-bit analog output PCI board. It offers fewer analog output channels than the ; confirm channel count and timing requirements before substitution.
- PXI-6733: Eight-channel, 16-bit analog output module for PXI systems. It shares the model-family functionality but uses a different host platform and is not a direct PCI card replacement.
- PCI-6713: Eight-channel, 12-bit analog output board. It has the same channel count but lower output resolution than the .
- PCI-6703: Sixteen-channel analog output board intended for applications with a higher channel count. Verify output ranges and resolution against the specific application.
- PCI-6704: Thirty-two-channel analog output board for higher-density output requirements. Its channel architecture and application fit differ from the .
- 785822-01: NI-listed recommended replacement for the . Confirm driver, connector, timing, and application compatibility before migrating an existing test system.
Procurement note: Specify NI , part number 778510-01. For used or surplus boards, request clear photographs of the component side, connector, and part-number label, plus functional test evidence for all eight analog outputs, digital I/O lines, and counter/timer functions.
