Installing the Output Connector Assembly on the PXIe-4113

Complete the following steps to install the output connector assembly with a module and prepare signal connections.
  1. Disconnect and open the output connector assembly using the following steps:
    1. Loosen the thumbscrews at the top and bottom of the output connector assembly.
    2. Disconnect the output connector assembly from the PXIe-4113.
    3. Remove the screws from the output connector assembly.
    4. Open the backshell of the output connector assembly to expose the output connector plug.
    Figure 9. Disassembled Output Connector Assembly

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    Note The control loop of the PXIe-4113 always includes the sense leads. As a result, the sense leads must always be connected to maintain proper output regulation, so you must ensure that the sense leads do not accidentally become disconnected while the output is enabled. Internal protection resistors on the PXIe-4113 minimize the impact of open sense leads by providing a fallback sense path from the output terminals. When the sense terminals are disconnected and this fallback path is active, the output terminal voltage is approximately 2% higher than the programmed value, and the accuracy of the measured voltage is degraded by the same amount.
  2. Verify that the sense jumpers are in the correct position for your configuration.
    Note While you can manually wire the hardware for local sense, the NI-DCPower API supports only remote sense for this device. Thus, NI-DCPower cannot detect whether a local or remote sense hardware configuration is in use. Ensure you select the appropriate hardware configuration for your application.
  • For local sense configuration, use the provided sense jumpers to connect the Sense + and Sense - terminals to the respective + and - terminals on the output connector plug.
  • For remote sense configuration, remove all sense jumpers from the output connector plug. The Sense + and Sense - terminals must be connected remotely to their respective + and - terminals at the DUT.
Table 8. Jumper Configuration
Local Sense Jumper Configuration Remote Sense Jumper Configuration
Figure 10. Output Connector Plug Local Sense Configuration
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Figure 11. Output Connector Plug Remote Sense Configuration
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Note Connect sense terminals to their respective output terminals on the output connector plug to manually wire the hardware for local sense measurements.
  1. Verify that the terminals are wired correctly for your configuration.
  • For local sense configuration, connect the + and - terminals on the output connector plug to the DUT.
  • For remote sense configuration, connect the +, -, Sense +, and Sense - terminals on the output connector plug to the DUT. Sense + and Sense - terminals must be connected remotely to their respective Output + and Output - terminals at the DUT.
  1. Close the output connector assembly and reconnect it to the PXIe-4113 using the following steps:
    1. If using remote sense, secure the wires with the strain relief and secure the strain relief with screws.
      Table 9. Output Connector Assembly Strain Relief
      Strain Relief Position When to Use Diagram
      Strain Relief Up Use if you are connecting wires with a large total cross-sectional area
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      Strain Relief Down Use if you are connecting wires with a small total cross-sectional area
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    2. Close the backshell of the output connector assembly and secure it with screws.
    3. Connect the output connector assembly to the PXIe-4113.
    4. Tighten the thumbscrews at the top and bottom of the output connector assembly.
  2. Plug in and power on the chassis.
  3. (External Controller Only) If you are using an external controller instead of an embedded controller, power on the controller.

Combining Multiple Outputs

Cascading Multiple Channels in Series

Caution Do not exceed 150 V DC from any terminal to ground when cascading power supplies.

Because both channels on the PXIe-4113 are isolated outputs, you can cascade multiple channels in series to generate greater output voltage. For safety reasons, all the terminals must be less than 150 VDC from ground. Any terminal on the isolated channels can be connected to ground. When you cascade channels in series, a single PXIe-4113 can generate up to 20 V at 6 A using both channels, as illustrated in the following figures.

Figure 12. Series Connections for Local Sense Measurements

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Figure 13. Series Connections for Remote Sense Measurements

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Connecting Multiple Channels in Parallel

NI does not recommend operating multiple channels of the PXIe-4113 in parallel to generate larger currents.