NIPCI-6520 [NI]
Low-Cost Industrial Digital60 V, Channel-to-Channel Isolated; 低成本工业Digital60 V，通道至通道隔离
| 型号： | NIPCI-6520 |
| 厂家： | 
National Instruments |
| 描述： | Low-Cost Industrial Digital60 V, Channel-to-Channel Isolated |
| 文件： | 总5页 (文件大小：527K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low-Cost Industrial Digital I/O –
60 V, Channel-to-Channel Isolated
NI PCI-6520
• 8 channel-to-channel optically isolated
inputs, ±30 VDC
Operating Systems
• Windows 2000/NT/XP
• LabVIEW Real-Time
• 8 nonlatching mechanical relay outputs
• ±60 V switching voltage with maximum
switching current of 2 A and maximum
switching power of 60 W
• High-reliability industrial feature set,
includes: isolation, programmable
power-up states, digital filtering,
watchdog timers, and change detection
• NI measurement services software for
highest productivity and performance
Recommended Software
• LabVIEW
• LabWindows/CVI
• Measurement Studio
Other Compatible Software
• C, C++
• Microsoft Visual Studio .NET 2003
Measurement Services Software
(included)
• NI-DAQmx driver, version 7.5 or higher
INPUT
OUTPUT
Low
Threshold
±± VDC
High
Threshold
±11 VDC
Mechanical Relay
Max
Current
2 A
Max
Power
60 W
Industrial
Feature Set
ꢀ
Product
Bus
Inputs
Isolation
Outputs
8
Max Voltage
±60 VDC, ±2.5 Vp, ±30Vrms
NI 6520
PCI
8
Channel-to-channel
Table 1. NI 6520 Specifications Overview
The PCI-6520 takes advantage of NI measurement services software to
speed up application development, with the NI-DAQmx driver software
(version 7.5 or higher) and many helpful features such as DAQ Assistant,
automatic code generation, and high-performance multithreaded
streaming technology.
Overview and Applications
The National Instruments PCI-6520 is an industrial digital I/O board with
eight channel-to-channel isolated digital inputs and eight nonlatching
mechanical relay outputs. You can use the eight differential, isolated,
±30 VDC digital inputs to read the status of sensors, actuators, and logic
devices. You can use the bipolar digital input channels to read from both Hardware
sinking and sourcing devices. The NI PCI-6520 registers a logic low if the
High-Reliability Industrial Feature Set
The PCI-6520 offers a set of high-reliability features designed for
voltage is between ±± V, and registers a logic high if the voltage is less
than -11 V or greater than +11 V.
demanding automation applications:
The PCI-6520 device offers three single-pole double-throw (SPDT)
Form C relays and five single-pole single-throw (SPST) Form A relays.
You can use the PCI- 6520 relay outputs to switch devices requiring up to
60 VDC or 30 Vrms with maximum current of 2 A and maximum
switching power of 60 W.
• Isolation provides an extended voltage range for direct connection
to industrial sensors and actuators
• Programmable power-up states provide safe operation when
connected to pumps/valves/motors/relays
• Watchdogs timer detects computer or application crashes and ensures
safe recovery to know digital I/O states
Note: The switching current is limited by the maximum switching power
and maximum voltage (current = power/voltage).
• Change detection triggers your application and returns I/O data after
a digital event to minimize processor usage
The PCI-6520 configuration is completely programmable and does not
require setting up jumpers or DIP switches. This board is ideal for use
with a programmable automation controller (PAC) for automotive test,
industrial monitoring, and control applications. With high-current drive,
high-voltage outputs, and isolation, you can connect the digital I/O
module directly to a wide array of industrial electronic devices, sensors,
and actuators.
• Programmable input filters eliminate glitches/spikes and remove noise
Low-Cost Industrial Digital I/O – 60 V, Channel-to-Channel Isolated
Direct Sensor Connection with Isolation
• Driver crash – device driver ceases to respond
Isolation, a form of built-in signal conditioning, provides several
advantages, such as an extended voltage range for direct connection to
industrial sensors and actuators. Isolation also improves signal quality
and protects computer circuitry. The PCI-6520 provides channel-to-
channel isolation where every channel is physically and electrically
separated from the others. This isolation 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.
• PCI bus failure – communications cease to respond
With watchdogs, the digital outputs go to a safe state when a fault
condition is detected and recover safely after the watchdog timer
expires. Watchdogs are important whenever the module is connected
to actuators such as pumps, valves, motors, and relays. The PCI-6520
monitors the software application; if the application fails to reset the
watchdog timer within the time limit, the device automatically sets
the output lines to a user-defined safe state. The PCI-6520 remains in
the watchdog state until the watchdog timer is disarmed by the
application and new I/O values are written, the PCI-6520 is reset, or
the computer is restarted.
Trigger Your Application
with Change Detection
With change detection, you can automatically trigger your software
application to perform a digital read operation upon a digital change of
state. A digital change of state is defined as the rising edge (0 to 1
transition) or falling edge (1 to 0 transition) on one or more digital lines.
Using change detection, you can monitor for digital events with
minimal processor usage. No polling is necessary because the digital I/O
module generates an interrupt to automatically wake up your
application. Using NI-DAQmx software technology, PCI-6520 notifies the
software application when the event is detected, causing the application
to automatically perform a read operation.
Figure 1. PCI-6520 Hardware Block Diagram
To minimize the effects of noisy input lines, use programmable input
filters in combination with change detection to eliminate spurious
change detection events caused by noise or glitches. NI-DAQmx also
includes multithreaded streaming technology so digital change detection
events can occur independent of other data acquisition activities such as
analog input or output events.
Glitch-Free Startup with Programmable
Power-Up States
Using programmable power-up states, you can configure the initial
PCI-6520 output states in software to ensure glitch-free operation when
connected to industrial actuators such as pumps, valves, motors, and
relays. The PCI-6520 holds these I/O states after receiving power, so
Eliminate Noise with Programmable
your computer can boot and your software application can begin running. Input Filters
Programmable power-up states are glitch free, meaning the outputs
Programmable input filters remove noise, glitches, and spikes on inputs,
never go through an incorrect state during power up.
You can configure each individual output line as logic high or logic
low. The PCI-6520 stores the settings in onboard nonvolatile memory
and implements the power-up states automatically after power is
applied to the board.
and also provide debouncing for digital switches and relays. This feature
is important for applications in noisy industrial environments to prevent
false readings caused by noise. You can configure the programmable
input filter for each digital line by setting the filter time in seconds. Any
digital noise, glitch, or spike that is shorter than half of the specified
filter time will be blocked by the digital I/O device, preventing invalid
readings and false triggers for change detection events.
Watchdog Timers for Fault Detection and Recovery
Watchdog timers are an innovative technology that provide protection
against a wide variety of fault conditions:
• Computer crash – total OS crash
• Application crash – software application ceases to respond
BUY ONLINE at ni.com or CALL (866) 265 9891 (U.S.)
2
Low-Cost Industrial Digital I/O – 60 V, Channel-to-Channel Isolated
Relay Forms
Relays are classified by number of poles and number of throws. The
1
2
P1.0NO
P1.0COM
P1.0NC
P1.2NO
P1.2COM
P1.2NC
P1.4NO
P1.4COM
P1.6NO
P1.6COM
NO CONNECT
P0.0+
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
P1.1NO
pole of a relay is the terminal common to every path. Each position
where the pole can connect is called a throw. A relay can be made of
n poles and m throws. A single-pole single-throw (SPST) relay has one
pole and one throw. A single-pole double-throw (SPDT) relay has one
pole and two throws.
P1.1COM
P1.1NC
P1.3NO
P1.3COM
P1.5NO
P1.5COM
P1.7NO
P1.7COM
NO CONNECT
P0.1+
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Single-Pole Single-Throw (SPST) Relay
Single-Pole Double-Throw (SPDT) Relay
Figure 2. Types of Relays
P0.1-
P0.0-
Form
Symbol
Description
P0.3+
P0.2+
Form A
SPST relays with a normally open default state
P0.3-
P0.2-
P0.5+
P0.4+
Form C
SPDT relays that break the connection
with one throw before making contact with
the other (break-before-make)
P0.5-
P0.4-
P0.7+
P0.6+
P0.7-
P0.6-
Table 1. Form A and Form C Relays
Nonlatching Relays
Digital Input: P0.0 – P0.7
Form C relays: P1.0 – P1.2
Form A relays: P1.3 – P1.7
A nonlatching relay has a power-off initial position of normally closed
(NC). This position is maintained by the force of a spring or permanent
magnet while no current flows. The normally open (NO) contact is
maintained by the force of a magnetic field while current flows through
the coil. When the current stops, the relay reverts back to its initial NC
position. Nonlatching relays return to the default NC position in case of a
fault or power failure. This is particularly useful when controlling a motor
or value where the motor or valve needs to be turned off in case of
power failure or fault.
Figure 3. NI 6520, 37-Pin D-Sub I/O Connector
• Use DAQ Assistant to guide you to fast, accurate measurements with
no programming.
• Use automatic code generation to create your application in LabVIEW,
C, Visual Basic .NET, or C#.
• Take advantage of multithreaded streaming technology for 1,000X
performance improvements.
• Use automatic timing, triggering, and synchronization technology
to make advanced applications easy.
Software
NI-DAQmx Software Technology
• Visit ni.com for more than 3,000 FREE software downloads to
jump-start your project.
The PCI-6520 requires and is shipped with NI-DAQmx driver software,
version 7.5 or higher. NI-DAQmx software is also available for download
from ni.com/downloads. With NI-DAQmx, you can use your NI digital I/O
device in NI LabVIEW, ANSI C, Microsoft Visual C++, and the Microsoft
.NET languages C# and Visual Basic .NET.
• Use the NI-DAQmx functions for jumper-free software configuration
of all digital I/O features without hardware switches/jumpers
• Develop your application with easy and open programming in
LabVIEW, ANSI C, Microsoft Visual C++, C#, and Visual Basic .NET.
Using NI-DAQmx technology, you can access the full functionality and
state-of-the-art hardware technology of your PCI-6520 digital I/O board.
NI-DAQmx technology speeds up your development with many features
such as automatic code generation to make configuration and
programming easy. The PCI-6520 takes full advantage of key NI-DAQmx
software technologies such as multithreaded streaming technology for
dramatic improvements in I/O performance and ease of use.
BUY ONLINE at ni.com or CALL (866) 265 9891 (U.S.)
3
Low-Cost Industrial Digital I/O – 60 V, Channel-to-Channel Isolated
R37F-37M-1 – 37-pin D-Sub female-to-male ribbon I/O cable.
1 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .779195-01
Low-Cost 37-Pin Accessories
Several low cost accessory options are available for connectivity to the
37-pin D-Sub connector of the PCI-6520.
SH37F-P-4 – 37-pin D-Sub shielded female-to-pigtail cable.
± m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .778620-0±
CB-37FH – 37-pin female D-Sub horizontal terminal block that
mounts in line with the DIN rail.
TB-37F-37CP – 37-pin female D-Sub crimp and poke termination
accessory for custom cabling. High-voltage rated for Cat II,
150 VDC/VAC.
CB-37FH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .778673-01
CB-37FV – 37-pin female D-Sub vertical terminal block that mounts
perpendicular to the DIN rail.
TB-37F-37CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .779185-01
CB-37FV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .778672-01
TB-37F-37SC – 37-pin female D-Sub solder cup termination
accessory for custom cabling.
CB-37F-LP – 37-pin female D-Sub screw-terminal accessory for
direct connect to board or optionally via cable.
TB-37F-37SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77918±-01
CB-37F-LP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .779353-01
SH37F-37M – 37-pin D-Sub female-to-male shielded I/O cable.
1 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .778621-01
2 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .778621-02
Ordering Information
NI PCI-6520............................................................................779±±3-01
Family
Accessory
Cable
PCI-6520
CB-37FH (778673-01)
SH37F-37M (778621-01, 778621-02)
R37F-37M-1 (779195-01)
CB-37FV (778672-01)
SH37F-37M (778621-01, 778621-02)
R37F-37M-1 (779195-01)
CB-37F-LP (779353-01)
SH37F-P-± (778620-0±)
TB-37F-37CP (779185-01)
TB-37F-37SC (77918±-01)
–
–
–
–
For information on extended warranty and value added services,
visit ni.com/services.
BUY NOW!
For complete product specifications, pricing, and accessory
information, call (800) 813 3693 (U.S. only) or go to ni.com/daq.
CB-37FH
CB-37F-V
CB-37F-LP
SH37F-37M
R37F-37M-1
SH37F-P-4
TB-37F-37CP
BUY ONLINE at ni.com or CALL (866) 265 9891 (U.S.)
4
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Local Sales and Technical Support
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answers to your questions at ni.com/support.
SERVICE
NEEDS
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*342566A-01*
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