20
21
-1
1
42
Power Supply PS1000-A6-12.16
Application Notes
27.7
Series Operation
Power supplies of the same type can be connected in series for higher output voltages.
It is possible to connect as many units in series as needed, providing the sum of the output
voltage does not exceed 150Vdc. Voltages with a potential above 60Vdc are not SELV
any more and can be dangerous. Such voltages must be installed with a protection against
touching.
Avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the output
terminals.
Keep an installation clearance of 15mm (left / right) between two power supplies and avoid
installing the power supplies on top of each other. Do not use power supplies in series
in mounting orientations other than the standard mounting orientation (input terminals
on bottom of the unit).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using
multiple power supplies.
Figure 27.7 Series operation
27.8
Inductive and Capacitive Loads
The device is designed to supply any kind of loads, including capacitive and inductive loads.
If extreme large capacitors, such as EDLCs (electric double layer capacitors or
UltraCaps
)
with a capacitance larger than 5F are connected to the output, the device might charge
the capacitor in the
Hiccup
mode (see chapter 8).
Unit A
AC
DC
Unit B
AC
DC
-
+
-
+
Load
+
-
Earth
(see notes)
