National Instruments NI PXI-1056 - Manual (Page 35)

Chapter 3 Maintenance
© National Instruments Corporation 3-3 NI PXI-1056 User Manual
Resetting the AC Mains Circuit Breaker
If the PXI-1056 is connected to an AC source and encounters an
over-current condition, the circuit breaker on the rear panel will trip to
prevent damage to the chassis. Complete the following steps to reset the
circuit breaker.
1. Set the front-panel power switch to the Off position.
2. Disconnect the AC power cable.
3. Depress the circuit breaker to reset it.
4. Reconnect the AC power cable.
5. Set the power switch to the On position.
If the circuit breaker trips again, complete the following steps.
1. Press the front-panel power switch to the Standby position.
2. Disconnect the AC power cable.
3. Remove all modules from the chassis.
4. Complete the procedure described in the Connecting to Power Source
section of Chapter 2, Installation and Configuration . If any of the
monitoring LEDs are not a steady green, contact National Instruments.
5. Verify that the PXI-1056 can meet the power requirements of your
CompactPCI or PXI modules. Overloading the chassis can cause the
breaker to trip. Refer to Appendix A,
Specifications .
6. The over-current condition that caused the circuit breaker to trip may
be due to a faulty CompactPCI or PXI module. Refer to the
documentation supplied with the modules for troubleshooting
information.
Replacing the Modular Power Supply
This section describes how to remove, configure, and install the PXI-1056
power-supply shuttle.
Caution Disconnect the power cable prior to replacing the power supply shuttle.
Before connecting the power-supply shuttle to a power source, read this
section and the Read Me First: Safety and Radio-Frequency Interference
document included with the kit.