Rockwell Automation 1606-XLE240F-3 Power Supply Reference Manual - Manual (Page 21)

All parameters are specified at 24V, 2.5A, 230Vac input, 25ªC ambient and after a 5 minutes run-in time unless noted otherwise.
Rockwell Automation Publication 1606-RM031A-EN-P — April 2014 21
Bulletin 1606 Switched Mode Power Supplies
22.10. Daisy Chaining of Outputs
Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current
through one terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal block.
Fig. 22-8 Daisy chaining of outputs Fig. 22-9 Using distribution terminals
Power
Supply
+ + - -
Input
Output
Load
+ -
max 25A!
Power
Supply
+ + - -
Input
Output
Load
+ -
Distribution
Terminals
Power
Supply
+ + - -
Input
Output
Power
Supply
+ + - -
Input
Output
22.11. Series Operation
Unit B
-
+
Load
+
-
AC
DC
AC
DC
-
+
Unit A
Earth
(see notes)
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 no longer SELV and can be dangerous. Such
voltages must be installed with a protection against touching. Grounding of the
output is required when the sum of the output voltage is above 60Vdc. Avoid
return voltage (e.g. from a decelerating motor or battery) which is applied to
the output terminals. Maintain an installation clearance of 15mm (left / right)
between two power supplies and avoid installing the power supplies on top of
each other. Please note that leakage current, EMI, inrush current and harmonics
all increase when using multiple power supplies.
22.12. 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. In such situations, the inside temperature defines the ambient temperature for the power supply.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
The power supply is placed in the middle of the box; no other heat producing item is inside the box.
Enclosure: Rittal Typ IP66 Box PK 9519 100, plastic, 180x180x165mm
Load: 48V, 4A; (=80%) load is placed outside the box.
Input: 3x 400Vac
Temperature inside enclosure: 48.9°C (in the middle of the right side of the power supply with a distance of 2cm)
Temperature outside enclosure: 24.7°C
Temperature rise:
24.2K