PXIe-4139 LED Indicators

The PXIe-4139 features an Access LED and Active LED.

Access LED

The Access LED, located on the module front panel, indicates module power and access.

The following table lists the Access LED states.

Table 5. Access LED Indicator Status
Status Indicator Device State
(Off) Not Powered
Green Powered
Amber Device is being accessed

Why Is the Access LED Off When the Chassis Is On?

The LEDs may not light until the module has been configured in MAX. Before proceeding, verify that the PXIe-4139 appears in MAX.

If the Access LED fails to light after you power on the chassis, a problem may exist with the chassis power rails, a hardware module, or the LED.

Notice Apply external signals only while the PXIe-4139 is powered on. Applying external signals while the module is powered off may cause damage.
  1. Disconnect any signals from the module front panel.
  2. Power off the chassis.
  3. Remove the module from the chassis and inspect it for damage.
    Notice Do not reinstall a damaged module.
  4. Install the module in a different, supported slot within the same PXI chassis.
  5. Power on the chassis.
    Note If you are using a PC with a device for PXI remote control system, power on the chassis before powering on the computer.
  6. Verify that the module appears in MAX.
  7. Reset the module in MAX and perform a self-test.

Active LED

The Active LED, located on the module front panel, indicates the module output channel state.

The following table lists the Active LED states.

Table 6. Active LED Indicator Status
Status Indicator Output Channel State
(Off) Channel not operating in a programmed state
Green Channel operating in a programmed state
Red Channel disabled because of error, such as an overcurrent condition