Rockwell Automation Publication 1606-RM121A-EN-P - October 2020
21
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%
.
Ensure that the wire, which is connected to the N-terminal, is appropriately
fused.
Figure 27 - Operation on Two Phases
Use In a Tightly Sealed
Enclosure
When the device is installed in a tightly sealed enclosure, the temperature
inside the enclosure is higher than outside. In such situations, the inside
temperature defines the ambient temperature for the device.
In the following test setup, the device is placed in the middle of the box, and no
other heat-producing items are inside the box. The load is placed outside the
box.
The temperature sensor inside the box is placed in the middle of the right side
of the power supply with a distance of 1 cm (0.39 in.). The following
measurement results can be used as a reference to estimate the temperature
rise inside the enclosure.
240V
+10%
max
L2
L1
L3
L
N
Power Supply
AC
DC
Attributes
Values
Case A
Case B
Enclosure size
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
Input voltage
230V AC
230V AC
Load
24V, 3.04 A (=80%)
24V, 3.8 A; (=100%)
Temperature inside the box
34.2 °C (93.56 °F)
35.9 °C (96.62 °F)
Temperature outside the box
24.9 °C (76.82 °F)
25.2 °C (77.36 °F)
Temperature rise
9.3 K (16.74 °F)
10.7 K (19.26 °F)
