Software-Timed Analog Output – 16-Bit, 16 or 32 Channels
NI 670x
• 16 voltage and 16 current outputs • 16-bit resolution • 8 (5 V TTL/CMOS) lines • User-defined power-up states • Measurement services that simplify configuration and measurements
Operating Systems
• Windows 2000/NT/XP
Recommended Software
• LabVIEW • LabWindows/CVI • Measurement Studio
Other Compatible Software
• Visual Studio .NET • Visual Basic, C/C++, and C#
Measurement Services Software (included)
• NI-DAQmx driver • Measurement & Automation Explorer configuration utility
Calibration Certificate Available
Product NI 6703 NI 6704
1The
Bus PCI PCI PXI
Analog Outputs 16 voltage 16 voltage 16 current
Resolution 16 bits 16 bits
Output Rate Static Static
Output Range ± 10 V ±10 V, 0 to 20 mA1
Digital I/O 8 8
Counter/Timers – –
Current Sinks – 3
Triggers – –
current output varies when set between 0 and 100 µA.
Table 1. Channel, Speed, and Resolution Specifications
Overview
NI 670x devices are software-timed voltage and current output devices for PCI and PXI. With NI 6704 devices, you get 16 voltage outputs and 16 current outputs that you can use at the same time independently, as well as eight digital I/O (DIO) lines. You can independently set each output from ±10 V or 0 to 20 mA. The NI 6703 delivers 16 voltage outputs in addition to eight DIO lines.
Current Output Channels (NI 6704 only)
All 16 current outputs are identical. You can set each channel to source current from 0 to 20 mA – it does not sink current. The channels source current without requiring an external excitation source. Each output is accurate to ±2 µA.
I/O Connector
The analog outputs are available at a 68-pin SCSI II shielded connector. VCH are the voltage output channels. ICH are the current output channels. Each channel is referenced to a ground line, AO GND, which is shared between a voltage and current channel. A fused 5 VDC power signal from the PCI or PXI bus is available at the I/O connector as well.
Hardware
Voltage Output Channels
All 16 voltage outputs on the NI 6703 and NI 6704 are identical. You can set each channel for a bipolar voltage output of ±10 V. Each output is accurate to ±1 mV.
Software-Timed Analog Output – 16-Bit, 16 or 32 Channels
Control Address Data Bus Interface Logic Main Voltage Circuit Control/Lines nvRAM/ DAC Control RAM Addr/Ctrl Digital I/O Serial Number EEPROM 16-Bit DAC RAM Data DAC Out Main Current Circuit Current Output CircuitX16 16 Voltage Output Circuit X16 16
Ordering Information
PCI
I/O Connector
PCI/PXI/CompactPCI Bus
NI PCI-6704 ..................................................................777306-01 NI PCI-6703 ..................................................................778316-01
PXI
nvSRAM DIO Lines
6704 Only
NI PXI-6704 ..................................................................777796-01
Includes data acquisition driver software.
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+5 V .75 A Self-Resetting Circuit Breaker
Temperature Sensor
For complete product specifications, pricing, and accessory information, call (800) 813 3693 (U.S. only) or go to ni.com/dataacquisition.
Figure 1. NI 670x Hardware Block Diagram
Specifications
Analog Output
Output Characteristics
Device NI 6703 NI 6704 Voltage 16 16 Channels Current 0 16 Total 16 32
Digital I/O
Digital logic levels Level Input low voltage Input high voltage Output low voltage (Iout = 16 mA) Output high voltage (Iout = 16 mA) Minimum 0V 2V – 2.4 V Maximum 0.8 V 5V 0.45 V –
Resolution......................................................... 16 bits, 1 in 65,536 Type of DAC...................................................... Enhanced R-2R Data transfers .................................................. Programmed I/O
Voltage Output
Ranges.............................................................. ±10.1 V Output coupling ................................................ DC Power-on state ................................................. Independent, user-defined
Number of channels......................................... 8 input/output Compatibility .................................................... 5 V TTL/CMOS Power-on state ................................................. Input (high impedance)
Bus Interface
PCI, PXI ............................................................. Slave
Current Output (NI 6704 Only)
Range................................................................ Type .................................................................. Output compliance ........................................... Power-on state ................................................. 0.0; 0.1 to 20.2 mA Source, does not require external excitation source 0 to 10 V Independent, user-defined
Physical
Dimensions (not including connectors) PCI.............................................................. 17.5 by 10.7 cm (6.9 by 4.2 in.) PXI.............................................................. 16.0 by 10.0 cm (6.3 by 3.9 in.) I/O connector.................................................... 68-pin male SCSI II type
For more detailed specifications, please refer to the product manual.
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National Instruments • Tel: (800) 813 3693 • info@ni.com • ni.com
Software-Timed Analog Output Cables and Accessories
Analog Output Accessory Selection Guide
Model NI 6703, NI 6704 Shielding Shielded Unshielded Connect to… Screw terminals Custom Screw terminals Cable SH68-68-D1 SH68-68-D1 R6868 Accessory SCB-68 CA-1000 CB-68LP
Table 2. Recommended Accessories
I/O Connector Blocks
SCB-68 – Shielded I/O connector blocks giving you rugged, very low-noise signal termination. The SCB-68 also houses silk-screened component locations for easy addition of simple signal conditioning circuitry for your AO channels. SCB-68 ..................................................................................776844-01 Dimensions – 19.5 by 15.2 by 4.5 cm (7.7 by 6.0 by 1.8 in.)
CB-68LP, CB-68LPR – 68 screw terminals for easy connection of field signals to AO devices. They include one 68-pin male connector for direct connection to 68-pin cables. The connector blocks include standoffs for use on a desktop or for mounting in a custom panel. The CB-68LP has a vertical mounted 68-pin connector. The CB-68LPR has a right-angle mounted connector and can also be used with the CA-1000. CB-68LP ................................................................................777145-01 Dimensions – 14.35 by 10.74 cm (5.65 by 4.23 in.) CB-68LPR..............................................................................777145-02 Dimensions – 7.62 by 16.19 cm (3.00 by 6.36 in.)
Shielded I/O Cables
SH68-68-D1 – Similar to the SH68-68-EP cable, but dedicated for use with NI 670x devices. 1 m ........................................................................................183432-01 2 m ........................................................................................183432-02
Ribbon I/O Cables
R6868 – 68-conductor flat ribbon cable terminated with two 68-pin connectors. Use this cable to connect the NI 670x, NI PCI-671x, NI PXI-671x, and NI 673x devices to low-cost 68-pin accessories. 1 m ........................................................................................182482-01
SCB-68
CA-1000
CB-68LP I/O and CB-68LPR
R6868 Ribbon Cable
National Instruments • Tel: (800) 813 3693 • info@ni.com • ni.com
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Hardware Services
NI Factory Installation Services
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NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. We provide manual calibration procedures, services to recalibrate your products, and automated calibration software specifically designed for use by metrology laboratories. Visit ni.com/calibration.
Repair and Extended Warranty
OEM Support
We offer design-in consulting and product integration assistance if you want to use our products for OEM applications. For information about special pricing and services for OEM customers, visit ni.com/oem.
NI provides complete repair services for our products. Express repair and advance replacement services are also available. We offer extended warranties to help you meet project life-cycle requirements. Visit ni.com/services.
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