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
1
The
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 mA
1
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<0..15> are the voltage output channels.
ICH<16..31> are the current output channels. Each channel is
referenced to a ground line, AO GND<0...31>, 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<7..0>
6704 Only
NI PXI-6704 ..................................................................777796-01
Includes data acquisition driver software.
BUY NOW!
+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
(I
out
= 16 mA)
Output high voltage
(I
out
= 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.
2
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
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.)
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.)
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
3
NI Services and Support
NI has the services and support to meet your
needs around the globe and through the
application life cycle – from planning
and development through deployment
and ongoing maintenance. We offer
services and service levels to meet
customer requirements in research,
design, validation, and manufacturing.
Visit
ni.com/services
.
Local Sales and Technical Support
In offices worldwide, our staff is local to the country, giving you
access to engineers who speak your language. NI delivers industry-
leading technical support through online knowledge bases, our
applications engineers, and access to 14,000 measurement and
automation professionals within NI Developer Exchange forums.
Find immediate answers to your questions at
ni.com/support
.
We also offer service programs that provide automatic upgrades to
your application development environment and higher levels of
technical support. Visit
ni.com/ssp
.
SERVICE
NEEDS
Training and Certification
NI training is the fastest, most certain route to productivity with our
products. NI training can shorten your learning curve, save
development time, and reduce maintenance costs over the
application life cycle. We schedule instructor-led courses in cities
worldwide, or we can hold a course at your facility. We also offer a
professional certification program that identifies individuals who
have high levels of skill and knowledge on using NI products.
Visit
ni.com/training
.
Hardware Services
NI Factory Installation Services
NI Factory Installation Services (FIS) is the fastest and easiest way to
use your PXI or PXI/SCXI combination systems right out of the box.
Trained NI technicians install the software and hardware and
configure the system to your specifications. NI extends the standard
warranty by one year on hardware components (controllers, chassis,
modules) purchased with FIS. To use FIS, simply configure your
system online with
ni.com/pxiadvisor
.
Professional Services
Our Professional Services Team is comprised of NI applications
engineers, NI Consulting Services, and a worldwide National Instruments
Alliance Partner program of more than 600 independent consultants
and integrators. Services
range from start-up assistance
to turnkey system integration.
Visit
ni.com/alliance
.
Calibration Services
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
.
ni.com
• (800) 813 3693
National Instruments • info@ni.com
© 2005 National Instruments Corporation. All rights reserved. CVI, LabVIEW, Measurement Studio, National Instruments, National Instruments Alliance Partner, NI, ni.com,
NI-DAQ, and SCXI are trademarks of National Instruments. Other product and company names listed are trademarks or trade names of their respective companies.
A National Instruments Alliance Partner is a business entity independent from NI and has no agency, partnership, or joint-venture relationship with NI.
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