National Instruments Isolated Current Output Module SCC-CO20 User Manual

National Instruments Isolated Current Output Module SCC-CO20 User Manual

National instruments isolated current output module user's guide
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USER GUIDE

SCC-CO20 Isolated Current
Output Module
Conventions
<>
»
bold
The SCC-CO20 is an isolated current output module that outputs up to
20 mA. The output current level is proportional to the voltage applied to
the module by an analog output channel of an E/M Series DAQ device.
The following conventions are used in this guide:
Angle brackets that contain numbers separated by an ellipsis represent
a range of values associated with a bit or signal name—for example,
AO <3..0>.
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 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.

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Summary of Contents for National Instruments Isolated Current Output Module SCC-CO20

  • Page 1: User Guide

    USER GUIDE SCC-CO20 Isolated Current Output Module The SCC-CO20 is an isolated current output module that outputs up to 20 mA. The output current level is proportional to the voltage applied to the module by an analog output channel of an E/M Series DAQ device. Conventions The following conventions are used in this guide: <>...
  • Page 2: What You Need To Get Started

    italic Italic text denotes variables, emphasis, a cross-reference, or an introduction to a key concept. Italic text also denotes text that is a placeholder for a word or value that you must supply. Text in this font denotes text or characters that you should enter from the monospace keyboard, sections of code, programming examples, and syntax examples.
  • Page 3: Device Specific Information

    2 is the current sink, and pin 3 is the isolated loop supply. Figure 1 shows how the ground, sink, and supply connect to the E/M Series DAQ device. © National Instruments Corporation Tools – 1/8 in. flathead screwdriver –...
  • Page 4 Using the Isolated Loop Supply of the SCC-CO20 You can connect the SCC-CO20 to a load using either the isolated internal loop supply or an external supply. The internal loop supply outputs a voltage of 15 V with respect to the isolated ground reference. When using the internal loop supply, the compliance voltage is 12.5 V.
  • Page 5 Figure 3. Do not use more than two SCC-CO20 modules on a single circuit, because the resulting voltage can cause overheating and damage the modules and other equipment. © National Instruments Corporation SCC-CO20 Isolated Current Output Module User Guide...
  • Page 6 SCC-CO20 Isolated Current Output Module User Guide SCC-CO20 – SCC-CO20 – Figure 3. Connecting Two SCC-CO20 Modules to a Higher-Resistance Load SUPPLY 15 V iso ISO GND SUPPLY 15 V iso Load SINK ni.com...
  • Page 7 If both the supply and the load are grounded, connect the signals as shown in Figure 5. © National Instruments Corporation SCC-CO20 Load –...
  • Page 8 For information about how to configure the SCC-CO20 module using NI-DAQmx, refer to the SCC Quick Start Guide. Calibrating Gain and Offset Errors The SCC-CO20 is calibrated at the factory before shipment. If you want to adjust the gain and offset of the SCC-CO20 in your system using an E/M Series DAQ device, you need a current meter (ammeter) with an accuracy of at least ±2 μA.
  • Page 9 Refer to the Connecting the SCC-CO20 to a Load the isolated ground in signal connections. © National Instruments Corporation AO X ( ) --------------- - is the AO (X) voltage level.
  • Page 10: Specifications

    Specifications These ratings are typical at 25 °C unless otherwise stated. Electrical Number of output channels...1 Output referencing ...Nonreferenced (floating) Input range ...0 to 10 V Output range ...0 to 20 mA Voltage compliance ...12.5 V Maximum load resistance Absolute accuracy...0.1% of full-scale output range Temperature drift ...0.5 μA/°C typ Power Requirement Analog power ...175 mW max...
  • Page 11: Isolation Voltage

    42.4 V signals or for measurements within Categories II, III, or IV. Isolation Voltage Channel-to-earth isolation © National Instruments Corporation 1.87 cm (0.74 in.) Figure 6. SCC-CO20 Dimensions or 60 VDC. Do not use this device for connection to peak Continuous ...
  • Page 12: Electromagnetic Compatibility

    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 Safety This product meets the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: •...
  • Page 13: Online Product Certification

    Waste Electrical and Electronic Equipment (WEEE) At the end of the life cycle, all products must be sent to a WEEE recycling EU Customers center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit National Instruments...
  • Page 14 SCC-CO20 Module Pin Assignments Figure 7 shows the I/O connector pins on the bottom of the module. 1 Pin 1 Pin 2 Table 1 lists the signal connection corresponding to each pin. SCC-CO20 Isolated Current Output Module User Guide PWB Key Pin 19 Figure 7.
  • Page 15 National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your...

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