Rockwell Automation 1606-XLE480EPC Power Supply Reference Manual - Manual (Page 23)

Rockwell Automation Publication 1606-RM001B-EN-P - August 2013 23
Bulletin 1606 Switched Mode Power Supplies
23.10 Operation on Two Phases
The power supply can also be used on two-phases of a three-phase-system. Such a phase-to-phase connection is
allowed as long as the supplying voltage is below 240V
+10%
. Use a fuse or a circuit breaker to protect the N input.
The N input is internally not protected and is in this case connected to a hot wire. Appropriate fuses or circuit
breakers are specified in section “External Input Protection”.
23.11 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. 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 items are inside the box
24
0V
+10
%
ma
x
.
Fuse
L2
L1
L3
L
N
PE
Power Supply
AC
DC
internal
fuse