PXIe-4135 LED Indicators

The PXIe-4135 features an Access LED and Voltage 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 6. 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-4135 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-4135 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.

Voltage LED

The Voltage LED on the module front panel indicates the output channel state.

The following table lists the Voltage LED states.

Table 7. LED Voltage Status Indicator
Status Indicator Output Channel State Safety Interlock State
(Off) The device output is disconnected from the voltage generation source through output disconnect relays. Either open or closed.
Green The device output is connected to the voltage generation source and <42.4 V DC is present. Open; only <42.4 V DC is present.
Amber The device output is connected to the voltage generation source and ≥42.4 V DC is present. High voltage may be generated by the device itself or an external device. Closed; instrument can output up to its maximum voltage.
Red The device has a fault or is in error due to the voltage generated or measured by the device. Refer to the driver software for possible sources. The device will not operate until the error is cleared and/or the device is reset. High voltage may be present on the device. Open, and instrument is programmed to output ≥42.4 V DC.