Portable Modular DAQ Systems
SCC Signal Conditioning Overview
SCC Signal Conditioning Overview
NI SCC
• Signal conditioning for DAQ systems
• Up to:
•
16 analog inputs
•
8 digital I/O lines
•
2 unconditioned counter/timers
• Measurement type and connectivity
selectable on a per-channel basis
• Low-profile carriers for portable,
rack-mount, and desktop applications
• NI-DAQ driver software simplifies
configuration, measurement, and scaling
• Isolated voltage/current output
• Isolated digital I/O
• Relay switching
Connectivity Options
• BNC
• Minithermocouple
• Thermocouple
• LEMO (B-series)
• MIL-Spec
• 9-pin D-Sub
• Banana jack
• SMB
• Momentary pushbutton switch
• Toggle switch
• Rocker switch
• LED
• Potentiometer
• Strain relief
Sensors/Signals
• Thermocouples
• RTDs
• Strain gauges
• Force/load/torque/pressure sensors
• IEPE accelerometers
• Isolated voltage/current input
• Frequency input
• Lowpass filtering
Overview
National Instruments SCC provides portable, modular signal
conditioning to your DAQ system. SCC conditions a variety of
analog I/O and digital I/O signals. With this modular design, you
choose your conditioning on a per-channel basis. SCC systems offer
custom options for various sensors or signal connection types. While
the low-profile carrier is perfect for use with PCMCIA DAQCards
and DAQPads for portable applications, you can also use the system
for rack-mounted or desktop applications. SCC modules works with
all E Series and Basic multifunction DAQ devices.
20 SCC modules. Conditioned analog signals are passed directly to
the inputs of the DAQ device. SCC modules can also provide up to
300 V of working isolation to voltage and current input/output
signals from the DAQ device. Optically isolated digital I/O modules
can condition digital lines from the DAQ device or you can access
them directly using the 42-pin screw terminal mounted inside the
box. Relay modules add switching to your SCC DAQ system, and you
can access Analog Input, Analog Output, Digital I/O, Counter/Timer
signals as well as timing and triggering signals from the DAQ device
using feedthrough modules.
Data Acquisition and
Signal Conditioning
SCC DAQ Systems
SCC DAQ systems consist of an SC-2345 Series shielded carrier, SCC
modules, a DAQ device, and a cable. Each carrier can hold up to
SCC Features
SCC offers flexibility, customization, and ease of use in a single,
low-profile package.
Flexible I/O Options
SCC signal conditioning modules are either single or dual-channel
modules that condition analog or digital signals. SCC modules
are available for thermocouples, RTDs, strain gauges,
force/load/torque/pressure sensors, accelerometers, voltage and
current input, isolated voltage and current output frequency-to-
voltage conversion, lowpass filtering, isolated digital I/O, relay
switching and breadboarding for your custom circuitry (see Table 1
on page 252).
Module Cascading
Figure 1. SC-2345 with Configurable Connectors
SCC includes provisions for cascading two SCC analog input modules
on a single analog input channel. For example, you can pass an analog
input signal through both an attenuator module and a filter module.
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251
Portable Modular DAQ Systems
SCC Signal Conditioning Overview
SCC Signal Conditioning Overview
Removable Connectors
All SCC modules except the SCC-TC01 have removable screw-
terminal connectors. This simplifies signal connection and module
swapping for quick reconfiguration. The SCC-TC01 has a
minithermocouple connector for easy sensor connection and more
accurate cold-junction sensing.
J16 slots J9 is controlled by a single DIO line of the DAQ device.
The digital I/O lines of a DAQ device are line configurable, so you can
choose any combination of eight digital I/O modules and relays.
Accessories
The SC-2345 with configurable connectors offers accessories such as a
panel-mount kit, a rack-mount kit for 19 in. cabinets, a stacking kit, and
a handle kit for use with multiple carriers and with DAQPad devices.
Connectivity Options
The SC-2345 with Configurable Connectors is a shielded carrier that
offers custom I/O and interface panelettes to match your sensors.
With interface panelettes, you can add hardware controls and
displays to your system. Blank panelettes are also available to fill
unused positions or for customization. See page 267 for complete
panelette options.
SCC Module
SCC-AI Series
SCC-A10
SCC-LP Series
SCC-TC Series
SCC-RTD01
SCC-SG Series
SCC-ACC01
SCC-CI20
SCC-AOIO
SCC-CO20
SCC-FVO1
SCC-DIO1
SCC-DO01
SCC-SG11
SCC-FT01
SCC-RLY01
Input Types
Isolated analog input
±100 V (10:1 attenuator)
Lowpass filters
Thermocouples, ±100 mV
RTD (2, 3, and 4-wire)
Strain gauges and force/load/torque sensors
Accelerometers
0 to 20 mA current input
Isolated voltage output, ±10 V
Isolated current output, 0 to 20 mA
Frequency-to-voltage
Isolated digital input
Isolated digital output
Shunt calibration
Unconditioned or custom
Switch 5 A at 30 VDC or 250 VAC
Number of
Channels
2
2
2
1
2
2
1
2
1
1
2
1
1
2
2
1
Software
You can develop your SCC DAQ System applications very quickly
and easily with the NI-DAQ driver software or with LabVIEW.
NI-DAQ is the robust driver software that makes it easy to access the
functionality of your data acquisition and signal conditioning
hardware, whether you are a beginner or an advanced user. Helpful
features include:
Automatic Code Generation
– DAQ Assistant is an interactive guide
that steps you through configuring, testing, and programming
measurement tasks and generates the necessary code automatically.
Cleaner Code Development
– Basic and advanced software functions
have been combined into one easy-to-use yet powerful set to help
you build cleaner code and move from basic to advanced
applications without replacing functions.
High-Performance Driver Engine
– Software-timed single-point input
(typically used in control loops) with NI-DAQ achieves rates of up
to 50 kHz. NI-DAQ also delivers maximum I/O system throughput
with a multithreaded driver.
Test Panels
– NI-DAQ lets you test all four device functions before
you begin development with test panels, accessible either from
your development environment, such as LabVIEW, or the
configuration utility.
Scaled Channels
– Easily scale your voltage data into the proper
engineering units using the NI-DAQ Channel Wizard. By choosing
from a list of common sensors and signals or creating your own
custom scale.
LabVIEW Integration
– All NI-DAQ functions offer the waveform data
type, which carries acquired data and timing information directly
into more than 400 built-in analysis routines in LabVIEW, and
displays the results in engineering units on a graph.
Data Acquisition and
Signal Conditioning
Table 1. SCC Signal Conditioning Modules
Power Options
Each SCC system offers three different power options. Depending on
the total power consumption of the SCC modules installed, you can
power the SCC system from (1) the 5 VDC line of a DAQ device or
an external 5 VDC source, (2) an AC power source, or (3) an external
7 to 42 VDC power supply. To determine which power option is best
for your application, see the SC-2345 shielded carrier (page 254) or
visit the online SCC Advisor at
ni.com/advisors
Signal Routing
Many of the SCC analog input modules are dual-channel modules.
When a dual-channel module is installed in the SC-2345, the two
output voltages of the module are routed to two input channels of
the DAQ device, channels X and X+8, where X is any integer
0 through 7. For example, if a dual-channel module is installed in the
J1 socket of the SC-2345, the output voltages are routed to input
channels 0 and 8 of the E Series DAQ device.
Digital modules connect directly to individual digital I/O lines of the
DAQ device. For example, a digital output module installed in any of
Operating System Compatibility
All modules work with Windows 2000/NT/XP
For information on other operating systems such as Linux and
Mac OS X see page 187.
252
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Portable, Shielded SCC Module Carriers
SCC Carriers
NI SC-2345 Series
• Shielded carriers for up to 20
SCC modules
• Portable, low-profile packaging
• Cables directly to an E Series or
Basic multifunction
DAQ device
• Powered by DAQ device
(additional power options available)
Operating Systems
• Windows 2000/NT/XP
Recommended Software
• LabVIEW
• LabWindows/CVI
• Measurement Studio
• Lookout
• VI Logger
SC-2345 Connector Block
• Strain relief for signal wiring
• Hinged lid for easy access
Other Compatible Software
• Visual Basic
• C/C++, C#
SC-2345 Carrier with
Configurable Connectors
• Panelettes for sensor connectivity
• Panelettes for control and display
• Blank panelettes for filler
Driver Software (included)
• NI-DAQ 7
Overview
Data Acquisition and
Signal Conditioning
The National Instruments SC-2345 Series consists of two types
of carriers, the SC-2345 connector block and the SC-2345 with
configurable connectors. These enclosures for SCC signal
conditioning modules connect directly to 68-pin DAQ devices.
They include sockets for SCC modules, along with screw terminals
for convenient connection to digital I/O and counter/timer (GPCTR)
signals from the DAQ device. These carriers offer three power
options to increase the flexibility of deployment.
Sockets J17 through J20 access the two analog output channels and
the GPCTR channels 0 and 1.
J1-J8
Single-stage
SCC Modules
J1
J2
J3
J4
J5
J6
J7
J8
J17 J18
Power Module
SC-2345 Connector Block
The SC-2345 includes 20 SCC sockets, labeled J1 through J20 (see Figure
1). Sockets J1 through J8 accommodate SCC modules for conditioning
signals on the analog input channels of the DAQ device. For example, an
SCC module plugged into socket J1 conditions signals for channels 0 and
8 of the device.
You can use sockets J9 through J16 for either digital I/O modules or
dual-stage analog input conditioning. When using dual-stage
conditioning of analog inputs (for applicable modules), wire your input
signal to the first-stage module (in sockets J9 through J16).
The SC-2345 routes the output signal of the first-stage SCC module to
the input of the second stage SCC module internally (see Figure 2). When
using sockets J9 through J16 for digital I/O, simply plug in a digital SCC
module or the SCC-FT01 for custom digital applications.You can use any
combination of SCC digital input or digital output modules. The digital
I/O lines of E Series or Basic multifunction DAQ devices are configurable
for input and output on a line-by-line basis. You can also access the DIO
lines of the DAQ device using the screw terminal block.
J9-J16
A) Dual-stage
conditioning of
analog inputs, or
B) DIO Signal
Modules
Screw Terminal Block
J9
J10 J11 J12 J13
J14 J15 J16
J19 J20
Strain relief
Figure 1. Diagram of Socket Layouts on SC-2345 Connector Block
Analog SCC
Connected to J1
Inputs
Second Stage
Analog SCC
Connected to J1
First Stage
Analog SCC
Connected to J9
Inputs
Signals routed to
the second stage
SCC internally
A. Single-Stage Analog Input
SCC Configuration
B. Dual-Stage Analog Input
SCC Configuration
Figure 2. Single-Stage and Dual-Stage Analog Input SCC Configuration for the
SC-2345 Connector Block
266
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Portable, Shielded SCC Module Carriers
SCC Carriers
SC-2345 Carrier with Configurable Connectors
The SC-2345 with Configurable Connectors is electrically and
functionally identical to the SC-2345 connector block. The only
differences are the orientation of some modules and the addition of
I/O connector and interface panelettes. This carrier is available with
either a side 68-pin connector (recommended for DAQCard products)
or a rear 68-pin connector (recommended for DAQPad products).
The SC-2345 with Configurable Connectors handles dual-stage
conditioning and digital I/O modules. It also offers custom
connectivity by adding panelettes along its front and rear panels.
Select up to 18 panelettes for side-mount 68-pin versions, or
15 panelettes for rear-mount 68-pin versions. With I/O panelettes,
you can connect your sensor directly to the SCC system. With
interface panelettes, you can add hardware controls and displays to
your system. Blank panelettes are also available to fill unused
positions or for modification to fit your custom application needs.
Panelette
Minithermocouple jack
Thermocouple jack
BNC
SMB
Banana jack
LEMO (B-Series)
MIL-Spec
9-pin D-Sub
Momentary switch
Toggle switch
Rocker switch
LED
Potentiometer
Strain relief
Blank
Description
J or K-type
or uncompensated
J or K-type
or uncompensated
BNC connector
SMB connector
Banana jack
2-pin female
4, 6-pin female
2, 4, 6-pin female
Single (male)
Single (female)
Dual (male)
Dual (female)
On – off
(On – off – on)
(On – off – on)
Red, green, yellow,
and orange LEDs
1 turn, 10
Ω
Small
Filler panel
Connectors/Units
per Panelette
2
2
1
1
2
4
2
2
1
1
1
1
2
2
2
2
1
4
1
1
–
Slot Width
1
1
1
1
1
1
1
1
1
1
2
2
3
3
1
1
1
1
1
2
–
Table 1. SC-2345 Panelettes Options
Panelettes
If you choose either of the two versions of the SC-2345 with
configurable connectors as your carrier, then you can install
connectivity and interface panelettes to customize your SCC system.
Panelette options include BNC, SMB, LEMO (B-Series), MIL-Spec,
banana jack, thermocouple plug, 9-pin D-Sub connectors, rocker
switches, toggle switches, momentary switches, potentiometers, and
LEDs. Please note, some panelettes occupy more than one panelette
slot. All panelettes except for the strain-relief options include lead
wires that you connect to the screw terminals of any SCC module or
to the 42-pin screw terminal block inside the SC-2345. The
thermocouple and minithermocouple jack connector wires are made
of the appropriate metals to avoid forming unwanted cold junctions.
Data Acquisition and
Signal Conditioning
Minithermocouple
BNC
SMB
9-Pin D-Sub
Banana Jack
LEMO (B-Series)
MIL-Spec
Toggle Switch
Rocker Switch
LED
Strain Relief
Potentiometer
Momentary Switch
Blank
Figure 3. SC-2345 Panelettes Options
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267
Portable, Shielded SCC Module Carriers
SCC Carriers
Screw Terminals
Each SC-2345 shielded carrier includes a 42-position screw terminal
block for easy access to digital lines of the E Series or basic
multifunction DAQ device, including DIO<0..7>, PFI<0..9>,
GPCTR 0,1, +5 V, DGND, AISENSE, FREQ_OUT, EXTSTROBE,
and SCANCLK.
Power Options
SC-2345 carriers have three power options:
• SCC-PWR01 – 5 VDC from the DAQ device or an external supply
• SCC-PWR02 – universal AC external supply
• SCC-PWR03 – 7 to 42 VDC external supply module (power supply
not included)
One power module is included with your carrier. Power modules
are sold separately in case you want to use your SC-2345 in two or
more configurations.
If you choose the SCC-PWR01, it is possible to power your SCC
system with the internal power source of your DAQ device. NI
DAQCards and DAQPads provide 800 mW of total power (490 mW
Panelettes (continued)
Accessories
The SC-2345 with Configurable Connectors offers two optional
accessories. For 19 in. rack systems, choose the rack-mount kit.
If you are using two SCC systems, or a single SCC system with a
DAQPad device, choose the stacking kit to mechanically attach
both systems.
Ordering Information
NI SC-2345 Connector Block with
SCC-PWR01..............................................................777458-01
SCC-PWR02..............................................................777458-02
SCC-PWR03..............................................................777458-03
NI SC-2345 with Configurable Connectors (side 68-pin) with
SCC-PWR01..............................................................777722-01
SCC-PWR02..............................................................777722-02
SCC-PWR03..............................................................777722-03
NI SC-2345 with Configurable Connectors (rear 68-pin) with
SCC-PWR01..............................................................778018-01
SCC-PWR02..............................................................778018-02
SCC-PWR03..............................................................778018-03
Separate Power Modules
Data Acquisition and
Signal Conditioning
SMB (4 included) ..........................................................185505-01
9-pin D-Sub
1 male ........................................................................184738-01
2 male ........................................................................184738-02
1 female......................................................................184738-03
2 female......................................................................184738-04
Strain relief (small) ......................................................184721-01
Blank ..............................................................................184483-01
Momentary push-button switches (2 included) ........185380-01
Rocker switch (on/off/on) ............................................185379-01
Toggle switches (on/off/on, 2 included) ......................185378-01
Potentiometer (10 kΩ, single-turn) ............................185377-01
LEDs (4 included-1 green, 1 red,
1 orange, 1 yellow) ....................................................185376-01
Cables
SCC-PWR01 ..................................................................183971-01
SCC-PWR02 ..................................................................183971-02
SCC-PWR03 ..................................................................183971-03
Power Cords for the SCC-PWR-02
U.S. 120 VAC..................................................................763000-01
Japan 100 VAC ..............................................................763000-01
United Kingdom 240 VAC ............................................763064-01
Swiss 220 VAC ..............................................................763065-01
Australian 240................................................................763066-01
Universal Euro 240 VAC................................................763067-01
North American 240 VAC ............................................763068-01
Panelettes
SH6868-EP
1 m ............................................................................184749-01
2 m ............................................................................184749-02
SH68-68R1-EP ..............................................................187051-01
R6868 ............................................................................182482-01
SH1006868
1 m ............................................................................182849-01
2 m ............................................................................182849-02
PSHR68-68 shielded cable kit ......................................777293-01
SHC6868-EP..................................................................186838-01
Accessories
Minithermocouple, J-type (2 included) ......................184736-01
Minithermocouple, K-type (2 included) ....................184736-02
Minithermocouple, uncompensated (2 included) ......184736-03
Thermocouple, J-type ..................................................187597-01
Thermocouple, K-type..................................................187597-02
Thermocouple, uncompensated ..................................187597-03
BNC (2 included)..........................................................184737-01
Banana jack (2 included) ..............................................186405-01
LEMO (B-Series)
2-pin, female..............................................................187585-01
4-pin, female..............................................................187585-02
6-pin, female..............................................................187585-03
MIL–C–26482 (Series 1)
MS 3112 E 8-2 S ......................................................187591-01
MS 3112 E 8-2 S ......................................................187591-02
MS 3112 E 8-4 S ......................................................187591-03
CA-1000 rack-mount kit (1U) ....................................777665-01
CA-1000 stacking kit ....................................................777666-01
CA-1000 panel mount kit ............................................187243-01
Strain relief kit
1
............................................................187407-01
cannot use the strain relief kit in conjunction with the rack-mount, panel-
mount, or stacking kits.
1
You
For information on extended warranty and value added services,
see page 20.
BUY ONLINE!
Visit
ni.com/info
and enter sc2345.
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