Tap Settings; Table 5-1. Maximum Tap Setting Voltages And Currents - Advanced Energy MDX II User Manual

have some of the characteristics of arcs, which is confusing to some circuitry. Arc-Check was
developed to deal with these arc-like process phenomena, eliminating short-inducing flakes in
applications where keeping the chamber extremely clean is impractical.
You can program this optional feature from the control panel or through the serial port.
Arc-Check waits the amount of time you specify (50 ms to 5 s) and then attempts to
extinguish the "arc" by reducing the MDXII unit's output level to zero. Arc-Check then ramps
the output to the maximum current available with the unit's present tap setting and
programmed limit. If this removes the short, output voltage rises. When the voltage (or power)
reaches the operating conditions of the previously selected method of output regulation, Arc-
Check returns control to that circuitry. If the short is not removed by the time the out-of-
setpoint timer runs out, the MDXII unit turns off output and displays the "Out-of-Setpoint"
message (see page 8-5).
Maximum current is delivered into the short until either the flake is destroyed or output is shut
off. Use the out-of-setpoint timer (page 5-3) to specify how long the MDXII unit can operate
at this level before automatically shutting off.
WARNING:
If you do not set a limit on how long the MDXII unit can drive maximum current into
the flake, the target, and other equipment, the MDXII unit could be damaged.

TAP SETTINGS

The MDXII unit has six internal voltage taps, which let you set six different output ranges for
each unit. Depending on the tap setting, full rated output power can be delivered at voltages
ranging from 315 V to 1250 V.
In general, each MDXII unit leaves the factory set for tap 4, but you can easily select a
different tap from any of the three interfaces.
Table 5-1 on page 5-7 indicates the maximum current that can be produced at each tap and
shows the range of output voltages available at each when the MDX is in voltage regulation.

Table 5-1. Maximum Tap Setting Voltages and Currents

Tap Max.
Number Output
Voltage
tap 1 400 V
tap 2 500 V
tap 3 625 V
5700262-R
Maximum Output
Current
MDXII 15k MDXII 30k
48.00 A 96.00 A
37.50 A 75.00 A
30.00 A 60.00 A
Operation Overview
MDXII Power Supplies
5-7