The PXIe-6544/6545/6547/6548 features an ACTIVE LED and ACCESS LED.

ACTIVE LED

The following table lists the ACTIVE LED states.

Table 4. ACTIVE LED Indicators
Color Indications
(Off ) Device is not armed and not triggered.
Amber Device is armed and awaiting Start Trigger. If performing a dynamic acquisition operation, the device may be acquiring pretrigger samples.
Green Device received Start Trigger.
Red Error condition.

ACCESS LED

The following table lists the ACCESS LED states.

Table 5. ACCESS LED Indicators
Color Indications
(Off ) Device is not ready.
Amber Device is being accessed by software.
Green Device ready to be programmed
Red Running the niHSDIO Self Test VI or calling the niHSDIO_self_test function produced a failure.

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

The LEDs may not light until the module has been configured in Hardware Configuration Utility or MAX. Before proceeding, verify that the PXIe-6544/6545/6547/6548 appears in Hardware Configuration Utility or 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-6544/6545/6547/6548 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 Hardware Configuration Utility or MAX.
  7. Reset the module in Hardware Configuration Utility or MAX and perform a self-test.