TDK-Lambda 802 Series Operator'S Manual Download

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83488001 Revision N

6. OPERATING INSTRUCTIONS

The 802 power supply is designed for operation in two modes. The first mode is local, where
the power supply can be controlled from the front panel. Local operation is only possible with
the L model supply. The second mode is remote, where control signals are passed via the
25pin remote connector. Remote operation is possible with all 802 model power supplies (L,
S, or OEM).

6.1.

Local Operation (802L only)

The model 802L has full front panel instrumentation and controls for use in laboratory,
prototype or OEM systems. The front panel controls include power on/off, remote/local and
HV on/off switches, output voltage adjust, view set switch, digital voltage and current meters,
quick reference bar graphs and status indicators.  An internal AC contactor is included which
is controlled by the front panel power switch and the interlock terminals located on the rear of
the unit.  A BNC connector is provided on the rear panel for easily connecting a pulsed
INHIBIT signal when operating from the front panel.  The model 802L can be operated as a
"master" unit in parallel with several model 802S or OEM "slave" units for increased output
power.  Refer to Section 6.4 "Paralleling Units".

Before operating the power supply ensure a load capacitor is connected between the
power supply output, and the other terminal of the capacitor is connected to ground
or the appropriate point in the load circuit. Failure to correctly connect a capacitive
load prior to operating the power supply may result in damage.

HIGH VOLTAGES MAY POTENTIALLY EXIST FROM THIS POINT

FORWARD.

The power supply should be connected to 3 phase AC power as described in section 4.4.
The interlock terminals should be closed either with the supplied shorting link or by an
isolated external dry contact. Follow the steps below;

1. Ensure the output voltage potentiometer is turned fully counter clockwise.
2. Turn on the AC power switch, the cooling fan should start and the front panel indicators

will illuminate.

3. Turn the control key to the local position.
4. Push the View Set button and turn the Voltage potentiometer until the required load

voltage is displayed. The view set mode stays active for approximately 3 seconds before
the voltage display reverts to the output voltage mode.

5. Push the HV ON button. The load will charge to the preset voltage and once this voltage

is reached the End of Charge LED will illuminate. The supply will maintain this voltage
until the HV OFF button is pushed, or the load capacitor is discharged via the HV switch
in the load circuit.

After the load has been discharged the external Inhibit function can be used to shut down the
power supply output current which aids in the HV switch recovery. Application of an inhibit
signal will typically shut down the output current in approximately 15microseconds.

To turn OFF the power supply depress the HV OFF button, or use the Inhibit input to shut off
the output current but leave the supply in the HV ON condition. Opening the interlock
terminals will also cause the power supply to turn off. In this case the unit can only be turned
back on after the interlock has been closed and the HV ON button depressed followed by the
HV OFF button to RESET the fault. Any other fault occurring in the internal protection