ML120.244
MiniLine-2
24V,
5A,
S
INGLE
P
HASE
I
NPUT
22.9.
S
ERIES
O
PERATION
Earth
Unit A
AC
DC
Unit B
AC
DC
-
+
-
+
Load
+
-
Power supplies of the exact 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.
Earthing 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.
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 the bottom and output terminals on top of the unit).
Be aware that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
22.10.
O
PERATION ON
T
WO
P
HASES
2
40V
+10%
max.
Fuse
L2
L1
L3
L
N
PE
Power Supply
AC
DC
internal
fuse
The power supply can also be used on two-phases of a three-phase-system.
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 not internally protected and is in this case connected to a hot
wire. Appropriate fuses or circuit breakers are specified in section 0
“External Input Protection”.
22.11.
U
SE IN A
T
IGHTLY
S
EALED
E
NCLOSURE
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.
Enclosure:
Rittal Type IP66 Box PK 9510 100, plastic, 130x130x99mm
Input:
230Vac
Case A:
Load:
24V,
5A;
load
is placed outside the box
Temperature inside the box:
62.4°C (in the middle of the right side of the power supply with a distance of 1cm)
Temperature outside the box:
23.5°C
Temperature rise:
38.2K
Case B:
Load:
24V, 4A; (=80%) load is placed outside the box
Temperature inside the box:
54.8°C (in the middle of the right side of the power supply with a distance of 1cm)
Temperature outside the box:
22.8°C
Temperature rise:
32.0K
Apr. 2013 / Rev. 1.1 DS-ML120.244-EN
All parameters are specified at 24V, 5A, 230Vac input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
20/21