Xantrex Technology XDC manual Power Supply Operating States, Powering OFF Power Supply, Operation

Operation

Power Supply Operating States

Powering

OFF the

Power Supply

From the front panel, the safest method for shutting down the power supply is:

Step #	Do This	You Will See
1	OUT OFFON	The OUT OFF annunciator
		illuminates; Ouput V and I are 0.
2	Switch the AC power to OFF.	The AC OFF alarm, and then the unit
		fades to black.

Power Supply Operating States

The power supply has 5 operating states:

•Power-On

•Output Shutdown

•Soft Start

•Normal Operation

•Calibration

Power-OnThis is the period between the time that AC power is applied to the supply (AC breaker turned on) and the time that the power supply is ready for operation. During this period, the internal circuits are powering up and performing self-tests. At the end of the Power-On period, the supply is normally in its default Power-On mode with the output OFF, VSET=0 and ISET=0.

Output In this state, the output is disabled and there is no output regardless of power settings. Shutdown The power supply can be placed in the Output Shutdown state by a command (via the front panel or from the programming interface), via the Interlock signal, or from

a protection mechanism. This is also called the Standby mode.

Soft Start In this state, the output power is ramping up gradually towards its target load. This reduces equipment stress. This state occurs whenever the supply output is set to ON or a protection state is re-set, and is approximately 2 seconds in duration.

Normal This is the normal operating state for the power supply. The power supply is ready Operation to accept commands.

Calibration This is a service mode that is used to calibrate setpoints and readback levels for accuracy. Calibration should only be performed by qualified service personnel. For detailed information, see Appendix A.

58 Operating Manual for XDC Series Power Supply