National Instruments Network Card SCC AO10 User Manual

USER GUIDE  
SCC-AO10 Isolated Analog  
Output Module  
The SCC-AO10 is an isolated voltage output module with an output range  
of 10 V. The output voltage level is controlled by the DAC output of an  
E/M Series DAQ device. You can increase the output voltage level to  
20 V by connecting two SCC-AO10 modules in series.  
Conventions  
The following conventions are used in this guide:  
»
The » symbol leads you through nested menu items and dialog box options  
to a final action. The sequence File»Page Setup»Options directs you to  
pull down the File menu, select the Page Setup item, and select Options  
from the last dialog box.  
This icon denotes a note, which alerts you to important information.  
This icon denotes a caution, which advises you of precautions to take to  
avoid injury, data loss, or a system crash. When this symbol is marked on  
the product, refer to the Read Me First: Safety and Radio-Frequency  
Interference document, shipped with the product, for precautions to take.  
When symbol is marked on a product it denotes a warning advising you to  
take precautions to avoid electrical shock.  
When symbol is marked on a product it denotes a component that may be  
hot. Touching this component may result in bodily injury.  
bold  
Bold text denotes items that you must select or click in the software, such  
as menu items and dialog box options. Bold text also denotes parameter  
names.  
italic  
Italic text denotes variables, emphasis, a cross-reference, an introduction  
to a key concept, or text as it appears on a hardware label. Italic text also  
denotes text that is a placeholder for a word or value that you must supply.  
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Note Software scaling of measurements is not supported on the Macintosh operating  
system. Refer to the SCC-AO10 Connector Pin Assignments section.  
You can download NI documents from ni.com/manuals. To download  
the latest version of NI-DAQmx, click Download Software at ni.com.  
Device Specific Information  
Note For general SCC module installation and signal connection information, and  
information about the SC-2345/2350 carrier, refer to the SCC Quick Start Guide, available  
for download at ni.com/manuals.  
Installing the SCC-AO10  
Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document  
before removing equipment covers or connecting/disconnecting any signal wires.  
Plug the SCC-AO10 into either SC-2345/2350 analog output socket  
J(X+17), where X is 0 or 1. The SC-2345/2350 routes the voltage output of  
E/M Series DAQ device analog output channel AO (X) to the SCC-AO10.  
Connecting the SCC-AO10 to a Load  
Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document  
before removing equipment covers or connecting/disconnecting any signal wires.  
Note The signal names have changed. Refer to ni.com/infoand enter rdtntgto  
confirm the signal names.  
The SCC-AO10 has a three-pin screw-terminal connector that accepts  
28 to 16 AWG wires.  
The screw terminals are labeled by pin numbers 1 to 3. Pin 1 is the isolated  
ground. Pins 2 and 3 both connect to the isolated voltage output for  
flexibility in field wiring.  
Caution Connecting an external voltage source to the output terminals of the SCC-AO10  
may damage the module.  
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Figures 1 and 2 show the SCC-AO10 connected to a nonreferenced load  
and to a load with a high common-mode voltage.  
E/M Series  
DAQ Device SCC-AO10  
3
AO (X )  
2
Load  
AO GND  
1
I
Figure 1. SCC-AO10 Connected to a Nonreferenced Load  
E/M Series  
DAQ Device SCC-AO10  
3
AO (X )  
2
Load  
AO GND  
1
I
Figure 2. SCC-AO10 Connected to a Load with a High Common-Mode Voltage  
Connecting Two SCC-AO10 Modules in Series  
You can increase the maximum total output voltage to 20 V by connecting  
two SCC-AO10 modules in series. Plug the two modules into sockets J17  
and J18 of the SC-2345/2350, and wire the modules to a load as shown in  
Figure 3.  
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E/M Series  
DAQ Device  
SCC-AO10 in Socket J18  
3
2
1
AO 1  
+
VOUT2  
+
AO GND  
I
VOutTotal  
SCC-AO10 in Socket J17  
3
2
1
AO 0  
Load  
+
VOUT1  
AO GND  
I
Figure 3. Connecting Two SCC-AO10 Modules in Series  
The SC-2345/2350 routes the E/M Series DAQ device analog output  
channels AO 0 and AO 1 to the SCC-AO10 modules, and the resulting  
maximum output voltage range is 20 V. Refer to Figure 3 and use the  
following formula to calculate the total output voltage from both  
SCC-AO10 modules:  
VOutTotal = VOUT1 + VOUT2  
where  
VOutTotal is the total output voltage from both SCC-AO10 modules  
VOUT1 is the voltage across terminals 1 and 3 of the SCC-AO10  
module in socket J17  
VOUT2 is the voltage across terminals 1 and 3 of the SCC-AO10  
module in socket J18  
For information about how to configure the SCC-AO10 module with  
NI-DAQmx, refer to the SCC Quick Start Guide.  
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Using the SCC-AO10  
This section contains information regarding scaling voltage measurements  
and isolated ground references.  
Scaling Voltage Measurements  
The SCC-AO10 is a 10 V isolated analog output module. The output  
voltage is controlled by an E/M Series DAQ device AO output channel,  
AO (X). The relationship between the AO (X) voltage level and the output  
voltage level of the SCC-AO10 is a one-to-one linear relationship. That is,  
VAO(X) = VAO10  
where  
VAO(X) is the AO 0 voltage level  
VAO10 is the SCC-AO10 voltage output in volts  
Isolated Ground Reference  
Each SCC-AO10 module is referenced to its own isolated ground. Each  
isolated ground can have up to 60 VDC of common-mode voltage between  
itself and any other channel ground or chassis ground. Refer to the  
Connecting the SCC-AO10 to a Load section for ways to use the isolated  
ground in signal connections.  
Calibrating Gain and Offset Errors  
The SCC-AO10 is calibrated at the factory before shipment. To adjust the  
gain and offset of the SCC-AO10 in your system using an E/M Series DAQ  
device, you need a voltage meter and a 1/8 in. flathead screwdriver. Before  
adjusting the SCC-AO10, allow 30 minutes for the DAQ device to warm  
up to its nominal operating temperature.  
To adjust the gain and offset of the SCC-AO10, complete the following  
steps:  
1. Disconnect the load from the SCC-AO10 you want to calibrate.  
2. Set an output range of –10 to +10 V for AO (X), the E/M Series DAQ  
device channel connected to the SCC-AO10.  
3. Connect the negative lead of the voltmeter to the isolated ground  
terminal (pin 1) and the positive lead to the voltage output terminal  
(pin 2 or 3) of the SCC-AO10.  
4. Using your software, set AO (X) to output 0 VDC.  
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5. Adjust the offset potentiometer on the top of the SCC-AO10 until the  
voltmeter reads 0 VDC 100 μV. The offset is now calibrated.  
6. Using your software, have AO (X) output 9.9 VDC.  
Adjust the gain potentiometer on the top of the SCC-AO10 until the  
voltmeter reads 9.9 VDC. The gain is now calibrated.  
Specifications  
These ratings are typical at 25 °C unless otherwise stated.  
Electrical  
Number of output channels.................... One nonreferenced (floating)  
Input range ............................................. 10 V  
Output range........................................... 10 V  
Current drive .......................................... 30 mA  
Gain nonlinearity.................................... 0.5% of full-scale output range  
Output noise ........................................... 2.5 mVrms typ; 4 mVrms max  
Bandwidth.............................................. >23 kHz  
Slew rate................................................. 1 V/μs  
Short circuit protection  
Current ............................................ 37 mA max  
Duration .......................................... Unlimited  
Load impedance ..................................... 10,000 pF max  
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Power Requirement  
Analog power .........................................180 mW max at full load  
172 mW max with no load  
+15 V...............................................6 mA max at full load  
5.73 mA max with no load  
–15 V ...............................................6 mA max at full load  
5.73 mA max with no load  
Digital power (+5 V) ..............................1.15 W max at full load  
600 mW max with no load  
+5 V.................................................230 mA max  
120 mA max with no load  
Physical  
1.87 cm  
(0.74 in.)  
7.93 cm  
(3.12 in.)  
3.55 cm  
(1.4 in.)  
Figure 4. SCC-AO10 Dimensions  
Weight ....................................................28 g (1.0 oz)  
I/O connectors.........................................One 20-pin right-angle male  
connector; one 3-pin screw  
terminal  
Field-wiring diameter .............................28 to 16 AWG  
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Maximum Working Voltage  
(Signal + common-mode) each input should remain within 42.4 Vpeak or  
60 VDC of ground.  
Maximum working voltage refers to the signal voltage plus the CMV.  
Channel-to-earth (inputs) ....................... 42.4 Vpeak or 60 VDC,  
Measurement Category I  
Caution This device is rated for Measurement Category I and is intended to carry signal  
voltages no greater than 42.4 Vpeak or 60 VDC. Do not use this device for connection to  
signals or for measurements within Categories II, III, or IV.  
Isolation Voltage  
Channel-to-earth isolation  
Continuous...................................... 60 VDC,  
Measurement Category I  
Withstand........................................ 2300 Vrms verified by a 5 s  
dielectric withstand type test  
Environmental  
Operating temperature............................ 0 to 50 °C  
Storage temperature ............................... –20 to 70 °C  
Humidity ................................................ 10 to 90% RH, noncondensing  
Maximum altitude.................................. 2,000 m  
Pollution Degree (indoor use only)........ 2  
Stability  
Recommended warm-up time ................ 10 min (30 min for connected  
E/M Series DAQ device)  
Output offset drift................................... 300 μV/°C  
Gain temperature coefficient.................. 300 ppm/°C  
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Safety  
This product meets 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 the Online  
Product Certification section.  
Electromagnetic Compatibility  
This product meets the requirements of the following EMC standards for  
electrical equipment for measurement, control, and laboratory use:  
EN 61326 (IEC 61326): Class A emissions; Basic immunity  
EN 55011 (CISPR 11): Group 1, Class A emissions  
AS/NZS CISPR 11: Group 1, Class A emissions  
FCC 47 CFR Part 15B: Class A emissions  
ICES-001: Class A emissions  
Note For the standards applied to assess the EMC of this product, refer to the Online  
Product Certification section.  
Note For EMC compliance, operate this product according to the documentation.  
Note For EMC compliance, operate this device with shielded cables.  
CE Compliance  
This product meets the essential requirements of applicable European  
Directives as follows:  
2006/95/EC; Low-Voltage Directive (safety)  
2004/108/EC; Electromagnetic Compatibility Directive (EMC)  
Online Product Certification  
Refer to the product Declaration of Conformity (DoC) for additional  
regulatory compliance information. To obtain product certifications and  
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.  
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Environmental Management  
NI is committed to designing and manufacturing products in an  
environmentally responsible manner. NI recognizes that eliminating  
certain hazardous substances from our products is beneficial to the  
environment and to NI customers.  
For additional environmental information, refer to the NI and the  
Environment Web page at ni.com/environment. This page contains the  
environmental regulations and directives with which NI complies, as well  
as other environmental information not included in this document.  
Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of the 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.  
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SCC-AO10 Connector Pin Assignments  
Figure 5 shows the I/O connector pins on the bottom of the SCC-AO10.  
4
1
2
3
5
1 Pin 1  
2
Pin 2  
3
PWB Key  
4
Pin 19  
5 Pin 20  
Figure 5. SCC Module Bottom View  
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Table 1 lists the signal connection corresponding to each pin.  
Table 1. SCC-AO10 I/O Connector Signal Assignments  
Pin Number  
Signal  
1
2
E/M Series AO (X)  
E/M Series AO GND  
3
4
E/M Series AO GND  
5
6
7
8
9
+5 V  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
GND  
+ 5 V reference  
+15 V  
–15 V  
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refer to the appropriate location: Help»Patents in your software, the patents.txtfile on your  
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© 2002–2008 National Instruments Corporation. All rights reserved.  
371080D-01  
Aug08  
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