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daq-and-datalogging:documents:analog-input-signal-connections-2 [2023/06/14 06:05] – created Scandiwebdaq-and-datalogging:documents:analog-input-signal-connections-2 [2023/07/27 21:29] (current) – Arthur Brown
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-====== TechTip: ======+====== TechTip: Basic Analog Input Signal Connections (Part 2) ======
  
-===== Basic Analog Input Signal Connections (Part 2) ===== +**Objective**\\ 
- +
-*Objective**\\ +
 To provide DAQ product users with recommended single-ended/differential wiring guidelines for analog input measurements after considering sensor grounding, DAQ system grounding and isolation, and common mode voltage. To provide DAQ product users with recommended single-ended/differential wiring guidelines for analog input measurements after considering sensor grounding, DAQ system grounding and isolation, and common mode voltage.
  
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 **Recommended analog input configuration (based on a DAQ device with ±10 V common mode range)**\\  **Recommended analog input configuration (based on a DAQ device with ±10 V common mode range)**\\ 
-^  Ground Relationship between\\ Sensor and DAQ  ^  DAQ Input Configuration  |  MCC Recommendation                               |+^  Ground Relationship between\\ Sensor and DAQ  ^  DAQ Input Configuration  ^  MCC Recommendation    ^                           
 |  Common ground                                 |  Single-ended             |  Recommended if all inputs are common ground      | |  Common ground                                 |  Single-ended             |  Recommended if all inputs are common ground      |
 |  Common ground                                 |  Differential             |  Acceptable if some inputs are not common ground  | |  Common ground                                 |  Differential             |  Acceptable if some inputs are not common ground  |
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 MCC recommends using a single-ended configuration for the common ground scenario. However, if only some input channels/channel pairs are common ground, we recommend using the differential mode for all inputs. Figure 1 shows the recommended connections for a common ground/single-ended input system. MCC recommends using a single-ended configuration for the common ground scenario. However, if only some input channels/channel pairs are common ground, we recommend using the differential mode for all inputs. Figure 1 shows the recommended connections for a common ground/single-ended input system.
  
-{{https://files.digilent.com/resources/measurement-computing/Reference Images/SigSourceCommGndSE.png?632x283}}\\ +{{https://files.digilent.com/reference-images/SigSourceCommGndSE.png?632x283}}\\ 
  
 **Figure 1.** Signal source and AI DAQ device sharing common ground connected to single-ended input\\  **Figure 1.** Signal source and AI DAQ device sharing common ground connected to single-ended input\\ 
  
-{{https://files.digilent.com/resources/measurement-computing/Reference Images/picture 12.png?690x243}}\\ +{{https://files.digilent.com/reference-images/picture 12.png?690x243}}\\ 
  
 **Common Ground / Differential Inputs**\\  **Common Ground / Differential Inputs**\\ 
 Using a differential configuration is acceptable for common ground connections, although it requires more wiring and offers fewer channels than a single-ended configuration (see Figure 2). Using a differential configuration is acceptable for common ground connections, although it requires more wiring and offers fewer channels than a single-ended configuration (see Figure 2).
  
-{{https://files.digilent.com/resources/measurement-computing/Reference Images/SigSourceCommGndDiff.png?695x267}}\\ +{{https://files.digilent.com/reference-images/SigSourceCommGndDiff.png?695x267}}\\ 
  
 **Figure 2.** Signal source and AI DAQ device sharing common ground connected to differential input\\  **Figure 2.** Signal source and AI DAQ device sharing common ground connected to differential input\\ 
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 For the best performance with isolated signal sources, MCC recommends using a differential input configuration. Figure 7 shows the recommended connections for this configuration.\\  For the best performance with isolated signal sources, MCC recommends using a differential input configuration. Figure 7 shows the recommended connections for this configuration.\\ 
  
-{{https://files.digilent.com/resources/measurement-computing/Reference Images/SE-Iso.png?708x310}}\\ +{{https://files.digilent.com/reference-images/SE-Iso.png?708x310}}\\ 
  
 **Figure 7.** Isolated signal source connected to differential input\\  **Figure 7.** Isolated signal source connected to differential input\\ 
  
 +**More Information**\\ 
 +Please reach out to our support team on the Digilent Forum if you have any questions: [[https://forum.digilent.com/]]
 +  
 +Additional TechTips are available here in Digilent Reference: [[start]]
  
-More Information\\  
-Please contact Measurement Computing Corporation if you have any questions or if you would like any further information.\\  
- 
-Knowledgebase: [[https://kb.mccdaq.com/Default.aspx | kb.mccdaq.com]]\\  
-Phone: 508-946-5100\\  
-Fax: 508-946-9500\\  
-   
-Additional TechTips are available on our [[https://www.mccdaq.com/Technical-Articles | Data Acquisition Technical Articles web page.]]