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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:

<>

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

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.

Содержание SCC-CO20

Страница 1: ...le 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 preca...

Страница 2: ...nsions SC 2345 SC 2345 refers to both the SC 2345 connector block and the SC 2345 with configurable connectors SCC SCC refers to any SCC Series signal conditioning module What You Need to Get Started...

Страница 3: ...e SCC Quick Start Guide available for download at ni com manuals Installing the SCC CO20 Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment c...

Страница 4: ...olated ground reference When using the internal loop supply the compliance voltage is 12 5 V This allows for a maximum load resistance of 625 at 20 mA Figure 2 shows how to connect the SCC CO20 using...

Страница 5: ...ly voltage your application requires multiply the load resistance by the current you need to sink then add 2 5 V for the voltage drop across the protection diode and the current sink MOSFET If you nee...

Страница 6: ...CC CO20 Isolated Current Output Module 6 ni com Figure 3 Connecting Two SCC CO20 Modules to a Higher Resistance Load SCC CO20 1 2 15 V iso 3 SCC CO20 1 2 15 V iso 3 Load SUPPLY SINK ISO GND SUPPLY I I...

Страница 7: ...the SCC CO20 Using an External Loop Supply When you use an external loop supply the order of the supply and load does not matter as long as you do not create a second loop through which current flows...

Страница 8: ...n and offset of the SCC CO20 complete the following steps 1 Disconnect the load from the SCC CO20 you want to calibrate 2 Set an output range of 0 to 10 V for AO X the E M Series DAQ device channel co...

Страница 9: ...20 current output in amperes The current sink is an N channel power MOSFET sink to an isolated ground reference You can use the SCC CO20 with industry standard 0 to 20 or 4 to 20 mA current loops Note...

Страница 10: ...A 2 500 10 mA 1 250 15 mA 830 20 mA 625 Absolute accuracy 0 1 of full scale output range Temperature drift 0 5 A C typ 1 A C max Power Requirement Analog power 175 mW max 15 V 5 8 mA max 15 V 5 8 mA m...

Страница 11: ...ts 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 dev...

Страница 12: ...EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Immunity EN 61326 1997 A2 2001 Table 1 EMC EMI CE C Tick and FCC Part 15 Class A Compliant Note For EMC compliance operate this device with shielded c...

Страница 13: ...pins on the bottom of the module Figure 7 SCC CO20 Bottom View Table 1 lists the signal connection corresponding to each pin 1 Pin 1 2 Pin 2 3 PWB Key 4 Pin 19 5 Pin 20 Table 1 SCC CO20 Pin Signal Co...

Страница 14: ...any names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your softwar...

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