NI NIUSB-6525 Small, portable digital i/o device / eight channel-to-channel optically isolated input Datasheet

Industrial Digital I/O Device for USB –
60 V, Channel-to-Channel Isolated
NI USB-6525
• Small, portable digital I/O device
• Eight channel-to-channel optically
isolated inputs (±60 VDC)
• Eight channel-to-channel optically
isolated, solid-state relay outputs
(60 VDC/30 Vrms max)
• 500 mA maximum switching current
per channel
• One 32-bit event counter
• Full-speed USB (12 Mb/s) bus interface
• Built-in, removable connectors for
easy connectivity
• USB cable strain relief
Operating Systems
• Windows Vista/XP/2000
Recommended Software
•
•
•
•
LabVIEW
LabWindows™/CVI
Measurement Studio
LabVIEW SignalExpress
Other Compatible Software
• Visual Studio .NET
• C, C++
• Visual Basic
Measurement Services
Software (included)
• NI-DAQmx driver software
• Measurement & Automation Explorer
configuration utility
• LabVIEW SignalExpress LE
data-logging software
Product
NI USB-6525
Digital Inputs
8
Low Threshold
1 VDC
High Threshold
3.2 VDC
Input Current
3 mA/ch
SSR Outputs
8
Switching Current
500 mA
Max Signal Range
±60 VDC
Isolation
Ch-to-Ch
32-Bit Counters
1
Table 1. NI USB-6525 Specifications Overview
Overview and Applications
The National Instruments USB-6525 is a full-speed USB device with
eight normally open, channel-to-channel isolated, solid-state relay
outputs and eight ±60 VDC channel-to-channel isolated digital inputs.
The NI USB-6525 offers features for industrial control and manufacturing
test applications, such as factory automation, embedded machine
control, and production line verification. The solid-state relay outputs
have a 60 VDC/30 Vrms switching voltage and 500 mA/ch maximum
switching current, making them ideal for controlling pumps, valves,
motors, and other industrial actuators. The eight isolated digital input
channels break ground loops and offer protection from noise and spikes
on external signals. You can also use one of the digital input channels as
a 5 kHz, 32-bit event counter for counting digital pulses.
Hardware
The USB-6525 has eight channel-to-channel optically isolated inputs,
P1.<0..7>, and eight channel-to-channel optically isolated, solid-state
relay outputs, P0.<0..7>. The isolated inputs consist of an optocoupler, a
depletion-mode MOSFET-based current-limiting circuit, and a Schottky
diode. Each channel has its own positive and negative terminals capable
of detecting a wide range of DC signals, from 5 V TTL logic levels to DC
power supply levels up to 60 V.
PFI 0 (an alias to P1.7) can also function as the source for a 32-bit
counter. In this mode, the device counts low to high transitions on P1.7.
You can arm and disarm the counter as well as read or reset the count
through software.
You can connect loads to the solid-state relay outputs with an AC or
DC power source. The default power-on state of the solid-state relays is
open. The relays also remain open when the computer and the USB-6525
device are powered off.
Module
Terminal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Table 2. NI USB-6525 Pinout
Signal
P0.0A
P0.0B
P0.1A
P0.1B
P0.2A
P0.2B
P0.3A
P0.3B
P0.4A
P0.4B
P0.5A
P0.5B
P0.6A
P0.6B
P0.7A
P0.7B
Module
Terminal
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Signal
P1.0+
P1.0P1.1+
P1.1P1.2+
P1.2P1.3+
P1.3P1.4+
P1.4P1.5+
P1.5P1.6+
P1.6P1.7+/PFI 0+
P1.7-/PFI 0-
Industrial Digital I/O Device for USB – 60 V, Channel-to-Channel Isolated
Isolation
Software
Isolation is a form of built-in signal conditioning that provides an
extended voltage range for direct connectivity to industrial sensors and
actuators. The USB-6525 provides channel-to-channel isolation where
each channel is physically and electrically separated from the others.
Isolation provides three main benefits:
1. Safety from hazardous high voltages and transients
2. Rejection of common-mode voltages
3. Removal of ground loops
National Instruments measurement services software, built around
NI-DAQmx driver software, includes intuitive application programming
interfaces, configuration tools, I/O assistants, and other tools designed
to reduce system setup, configuration, and development time.
National Instruments recommends using the latest version of NI-DAQmx
driver software for application development in National Instruments
LabVIEW, LabWindows/CVI, and Measurement Studio. To obtain the
latest version of NI-DAQmx, visit ni.com/support/daq/versions. NI
measurement services software speeds up your development with
features including:
• A guide to create fast and accurate measurements with no
programming using DAQ Assistant
• Automatic code generation to create your application in LabVIEW;
LabWindows/CVI; LabVIEW SignalExpress; and Visual Studio .NET,
C/C++/C#, or Visual Basic using Measurement Studio
• Multithreaded streaming technology
• More than 3,000 free software downloads to jump-start your project
available at ni.com/zone
• Software configuration of all digital I/O features without hardware
switches/jumpers
• Free LabVIEW SignalExpress LE data-logging software
Safety from High-Voltage Transients
Isolation electrically separates high-voltage front-end channels from
each other and the low-voltage back end of the USB-6525. Signals
are passed between the two sections of the device using optocouplers.
By separating the two sections, any voltages within the isolation
specifications are prevented from entering the USB bus section or other
channels. Isolation provides protection for the user, data acquisition
system, and measurement data.
Common-Mode Voltage Rejection
A voltage common to both sides of a differential circuit pair is
called common-mode voltage. This phenomenon is typical in noisy
environments containing machinery and inductive loads. The differential
voltage across the circuit pair is the desired signal, whereas the common
voltage signal is the unwanted signal that may have been coupled into
the transmission line. The USB-6525 can measure signals from lines with
signal plus common-mode voltage of up to 60 VDC.
Ground Loop Removal
Ground loops are the most common source of noise in data acquisition
applications. They occur when two connected terminals in a circuit are
at different ground potentials, causing current to flow between the
two points. This additional voltage can cause significant error in the
measurement. When a ground loop exists, the measured voltage is
the sum of the signal voltage and the potential difference that exists
between the signal source ground and the measurement system ground.
This potential is generally not a DC level; therefore, the result is a noisy
measurement system. By offering an isolated floating ground on the
front end, the isolated USB-6525 devices are able to prevent ground
loops from forming.
The USB-6525 is compatible with the following versions (or later) of
NI application software – LabVIEW, LabWindows/CVI, and Measurement
Studio versions 7.x or LabVIEW SignalExpress. You can also use your NI
digital I/O device with ANSI C, Microsoft Visual C++, Visual Basic, and
the Microsoft .NET languages C# and Visual Basic .NET. The USB-6525 is
not compatible with the Traditional NI-DAQ (Legacy) driver.
Ordering Information
NI USB-6525 ..........................................................................779640-01
Includes NI-DAQmx software, LabVIEW SignalExpress LE data-logging software, and
a USB cable.
NI USB-6000 Series Prototyping Accessory ........................779511-01
Includes breadboarding area with cover and strain relief.
BUY NOW!
For complete product specifications, pricing, and accessory
information, call 800 813 3693 (U.S.) or go to ni.com/usb.
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
2
Industrial Digital I/O Device for USB – 60 V, Channel-to-Channel Isolated
Screw-terminal wiring ........................ 16 to 28 AWG copper conductor
wire with 10 mm (0.39 in.) of
insulation stripped from the end
Torque for screw terminals................. 0.22 to 0.25 N · m
(2.0 to 2.2 lb in.)
Specifications
These specifications are typical at 25 °C, unless otherwise noted.
Isolated Inputs
Number of channels............................ 8, ch-ch isolated
Input voltage range............................. -60 to 60 VDC
Weight
With connectors ............................. Approx. 87 g (3.1 oz)
Without connectors ........................ Approx. 64 g (2.3 oz)
Digital logic levels
Level
Input low voltage
Input high voltage
Min
-60 VDC
3.2 VDC
Max
1 VDC
60 VDC
Input current........................................ 3.0 mA/channel max
Solid-State Relay Outputs
Number of channels............................ 8, ch-ch isolated
Relay type ........................................... Normally open solid-state relay
(SSR)
Switching voltage ............................... 60 VDC/30 Vrms max
Switching current (per channel) ......... 500 mA max, full operation
temperature range
Switching rate (90% duty cycle)......... 5 operations per second
Relay open time .................................. 60 µs typ
Relay close time.................................. 1.2 ms typ
On-resistance ...................................... 550 mΩ, max
Off-leakage current (max) ................... 0.6 µA typ
Isolation
Channel-to-channel ............................ 60 VDC continuous
Channel-to-earth ground .................... 60 VDC continuous
Withstand .......................................... 60 VDC continuous
Note: Do not use this module for connection to signals or for
measurements within Measurement Categories II, III, or IV.
Environment
NI 6528 and PXI-6529 devices are intended for indoor use only.
Pollution degree (IEC-60664) ............. 2
Operating Environment
Ambient temperature ......................... 0 to 55 °C
Relative humidity ................................ 10 to 90%, noncondensing
Maximum altitude .............................. 2,000 m at 25 °C ambient
temperature
(tested in accordance with IEC-60068-2-1, IEC-60068-2-2, and IEC-60068-2-56)
Counter
Number of counters ............................ 1 (P1.7 can be configured as
a counter)
Resolution ........................................... 32 bits
Counter measurements....................... rising edge counting
Maximum input frequency.................. 5 kHz
Minimum high pulse width................. 20 µs
Minimum low pulse width.................. 180 µs
Bus Interface
USB specification................................ USB 2.0 full-speed (12 Mb/s)
Power Requirements
Input voltage ....................................... 4.5 to 5.25 VDC in configured
state
Active current...................................... 150 mA max
Suspend current.................................. 350 µA typ
Storage Environment
Ambient temperature ......................... -40 to 85 °C
Relative humidity ............................... 5% to 95%, noncondensing
(tested in accordance with IEC-60068-2-1, IEC-60068-2-2, and IEC-60068-2-56)
Safety and Compliance
Safety
This product is designed to meet the requirements of the following
standards of safety for electrical equipment for measurement, control,
and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
Note: For UL and other safety certifications, refer to the product label
or visit ni.com/certification, search by model number or product line,
and click the appropriate link in the Certification column.
Physical Characteristics
Electromagnetic Compatibility
Dimensions
Without connectors ........................ 6.35 by 8.51 by 2.31 cm
(2.50 by 3.35 by 0.91 in.)
With connectors ............................. 8.18 by 8.51 by 2.31 cm
(3.22 by 3.35 by 0.91 in.)
I/O connectors..................................... USB series B receptacle,
(2) 16 position (screw terminal)
plug headers
This product is designed to meet the requirements of the following
standards of EMC for electrical equipment for measurement, control,
and laboratory use:
• EN 61326 EMC requirements; Minimum Immunity
• EN 55011 Emissions; Group 1, Class A
• CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A
Note: For EMC compliance, operate this device according to
product documentation.
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
3
Industrial Digital I/O Device for USB – 60 V, Channel-to-Channel Isolated
CE Compliance
This product meets the essential requirements of applicable European
Directives, as amended for CE marking, as follows:
• 73/23/EEC; Low-Voltage Directive (safety)
• 89/336/EEC; Electromagnetic Compatibility Directive (EMC)
Note: Refer to the Declaration of Conformity (DoC) for this product for
any additional regulatory compliance information. To obtain the DoC for
this product, visit ni.com/certification, search by model number or
product line, and click the appropriate link in the Certification column.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers: At the end of their life cycle, all products must be
sent to a WEEE recycling center. For more information about WEEE
recycling centers and National Instruments WEEE initiatives, visit
ni.com/environment/weee.htm.
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
4
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.
Training and Certification
NI training is the fastest, most certain route to productivity with our
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schedule instructor-led courses in cities worldwide, or we can hold a
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Professional Services
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Partner program of more than 600 independent consultants and
integrators. Services range
from start-up assistance to
turnkey system integration.
Visit ni.com/alliance.
OEM Support
We offer design-in consulting and product integration assistance if you
want to use our products for OEM applications. For information about
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ni.com • 800 813 3693
National Instruments • [email protected]
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We also offer service programs that provide automatic upgrades to
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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.
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
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.
*351494A-01*
351494A-01
2007-8768-301-101-D
© 2007 National Instruments Corporation. All rights reserved. CVI, LabVIEW, Measurement Studio, National Instruments, National Instruments Alliance Partner, NI, ni.com, SCXI,
and SignalExpress are trademarks of National Instruments. The mark LabWindows is used under a license from Microsoft Corporation. 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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