Rockwell Automation 1606-XLE960MX-3N Power Supply Reference Manual - Manual (Page 20)

All parameters are specified at 48V, 20A, 3x480Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
20 Rockwell Automation Publication 1606-RM025A-EN-P — April 2014
Bulletin 1606 Switched Mode Power Supplies
25.8. Series Operation
Power supplies from the 1606-XLE family can be used in series to increase output voltage.
Fig. 25-4 Schematic for series operation Installation notes for use in series:
Unit B
-
+
Load
+
-
AC
DC
AC
DC
-
+
Unit A
Earth
(see notes)
a) It is possible to connect as many units in series as needed,
providing the sum of the output voltage does not exceed
150Vdc.
b) Voltages with a potential above 60Vdc are no longer rated SELV
and can be hazardous in some situations. Such voltages must be
installed with a protection to make the unit touch-safe.
c) For serial operation use power supplies of the same type.
d) Earthing of the output is required when the sum of the output
voltage is above 60Vdc.
e) Keep an installation clearance of 15mm (left/right) between two
power supplies and avoid installing the power supplies on top
of each other.
Note: Avoid return voltage (e.g. from a decelerating motor or
battery) which is applied to the output terminals.
25.9. Inductive and Capacitive Loads
The unit is designed to supply any kind of load, including inductive or capacitive loads with a capacity up to 120mF.
25.10. Loss of One Input Phase
The unit protects itself against a loss of one input phase and does not require an external protection device.
A phase-loss operation is possible for output currents below 4A. Above this level, the yellow LED indicates an
impending shut-down. If the missing phase does not recover, the unit switches off after 3.5s. Pressing the reset
button or cycling the input power (10s required) initiates a restart.
Please note that the input current and the output ripple are higher when one phase is missing.
25.11. Use in a Tightly Sealed Enclosure
When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher
than outside. The inside temperature defines the ambient temperature for the power supply.
Results from such an installation:
Power supply is placed in the middle of the box; no other heat producing equipment is inside the box.
Enclosure:
Rittal Typ IP66 Box PK 9519 100, plastic, 180x180x165mm
Load: 48V, 16A (=80% of the rated current); load is placed outside the box
Input: 3x400Vac
Temperature inside the box: 52.9°C (in the middle of the right side of the power supply with a distance of 2cm)
Temperature outside the box: 25.1°C
Temperature rise: 27.8K