AMETEK XT Series - Manual (Page 35)

Operation
Using Multiple Supplies
35
Automatic
Mode
Crossover
The automatic crossover system allows the power supply to automatically switch
operating modes in response to changing load requirements. For example, if the load
current attempts to increase above the setting of the current adjust control, the unit
will switch automatically from CV to CI mode. If you lower the load requirements,
the supply will automatically return to CV mode.
Constant
Power Loads
When powering constant power loads such as switch mode regulators, it is preferable
to run in constant voltage mode, with the current limit set to supply ample current.
Operating near the CV/CI transition point can cause operation to become unstable.
Using Multiple Supplies
Connecting
Multiple
Supplies in
Series
(Voltage
Mode Only)
You can operate two or more power supplies with outputs connected in series or in
parallel to obtain increased load voltage or current. A split supply configuration
allows you to obtain two positive outputs or a positive and a negative output.
Connect power supplies in series to obtain a single output supply with higher output
voltage. Connect the negative (–) terminal of one supply to the positive (+) terminal
of the next supply. The total voltage available is the sum of the maximum voltages
of each supply (add voltmeter readings). The maximum current available to the load
is equal to the current of the lowest rated supply in the series. See Figure 4.2 for a
representation of series operation.
Figure 4.2 Series Operation with and without OVP
!
CAUTION
The maximum allowable voltage in series operation is 400 Vdc.