Industrial, Channel-Channel Isolated,
32-Bit Counter/Timers
NI 6624
• 8 counter/timers with 26
channel-channel isolated inputs and
8 channel-channel isolated outputs
• 400 kHz maximum frequency with
48 VDC voltage range on inputs
and outputs
• Reverse and overvoltage protection
(±60 V max continuous), and
transient overvoltage input protection
(±400 V peak)
• Short-circuit protection on outputs
with automatic recovery
• Superior features for automotive
test, industrial monitoring and
control applications
• NI-DAQmx software for highest
productivity and performance
NEW
Operating Systems
• Windows 2000/NT/XP
• Real-Time performance
with LabVIEW
Recommended Software
• LabVIEW
• LabWindows/CVI
• Measurement Studio
Other Compatible Software
• C, C++
• Microsoft Visual Studio .NET 2003
Measurement Services
Software (included)
• NI-DAQmx 7.1 (7.2 for PXI-6624)
or higher
Family
NI 6624
Bus
PCI, PXI
Counter/Timers
8
Size
32 bits
Isolation
Channel to Channel
Max Source
Frequency
20 MHz
Compatibility
5 V Logic Thresholds
Digital I/O
–
Pulse
Generation
Buffered
Operations
Oscillator
Stability
50 ppm
Buffered Operations
DMA
Interrupt
3
No limit
Table 1. NI 6624 Specifications Overview
Overview and Applications
National Instruments 6624 devices are industrial isolated timing
interfaces for PCI and PXI/Compact PCI bus systems. You can use the
eight 32-bit channel-channel optically isolated counter/timers of an
NI 6624 device to perform a wide variety of buffered measurements or
other counter/timer tasks, including position or quadrature encoder
measurement, edge counting, period measurement, pulse-width
measurement, frequency measurement, semiperiod measurement,
2-edge separation measurement, pulse-width-modulation (PWM)
generation, pulse, and pulse-train generation.
NI 6624 devices offer superior features and high value for
automotive test, industrial monitoring and manufacturing test
applications such as factory automation, embedded machine control,
and production line verification. NI 6624 devices have been designed
from top to bottom to incorporate the latest hardware technologies
and provide innovative features for applications requiring
ease of use, high reliability, and performance. NI 6624 devices
take advantage of the NI-DAQ software (version 7.2 or higher),
which includes NI-DAQmx technology to speed up application
development with many helpful features such as the NI DAQ Assistant,
automatic code generation, and high-performance multithreaded
streaming technology.
signal quality and protects computer circuitry. NI 6624 devices provide
channel-channel isolation where every channel is physically and electrically
separated from the others, which breaks ground loops, improves common-
mode voltage and noise rejection, and permits the two parts of the circuit
to be at different voltage levels. Many industrial applications require
isolation to protect the electronics from transient voltage spikes and
provide greater common-mode noise rejection in electrically noisy
environments containing machinery and inductive loads.
Counter/Timers Based on NI-TIO ASIC
NI 6624 devices are equipped with the NI-TIO ASIC, a National
Instruments counter and digital I/O ASIC for advanced timing and
counting applications. Each NI 6624 features two NI-TIO ASICs to
provide a total of eight counter/timers. Each counter has a gate, auxiliary,
and source input, which can be controlled by external or internal signals.
Each counter has one output that can be routed externally or to other
counters on the board. 20 MHz and 100 kHz timebases are available on
each device for use with each counter/timer. A hardware trigger can be
used to start multiple counters simultaneously.
Buffered Measurements
NI 6624 devices use the National Instruments MITE bus interface
controller to implement bus-master DMA transfers. As a result, you
can perform high-speed, continuous operations such as buffered
position encoder measurement and buffered period measurement.
You can perform up to three simultaneous DMA transfers on an
NI 6624. You can use interrupts for additional simultaneous
buffered transfers.
Hardware
Connect Sensors Directly with Channel-Channel Isolation
Isolation is a form of built-in signal conditioning that provides several
advantages. Isolation provides an extended voltage range for direct
connection to industrial sensors and actuators. Isolation also improves
NI [ NATIONAL INSTRUMENTS CORPORATION ]
