PIM90.241
Feb. 2022 / Rev. 2.0 DS-PIM90.241-EN
www.pulspower.com
17 / 17
All parameters are specified at 24V, 3.8A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
21. Application Notes
21.1. CHARGING OF BATTERIES
Do not use the power supply to charge batteries.
21.2. SERIES OPERATION
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 must be installed with a protection against touching.
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.
Pay attention that leakage current, EMI, inrush current, harmonics will increase
when using multiple power supplies.
21.3. PARALLEL USE TO INCREASE OUTPUT POWER
Do not use parallel devices for higher output currents.
21.4. PARALLEL USE FOR 1+1 REDUNDANCY
Do not use this device to build redundant systems since there is no monitoring (DC-OK signal) included.
21.5. TWO PHASE OPERATION
The power supply can also be operated 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.
21.6. 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 power supply is placed in the middle of the box, no other heat producing items are inside 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 1cm. The following
measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
Case A
Case B
Enclosure size
110x180x165mm
Rittal Typ IP66 Box
PK 9516 100
plastic
110x180x165mm
Rittal Typ IP66 Box
PK 9516 100
plastic
Input voltage
230Vac
230Vac
Load
24V, 3.04A; (=80%)
24V, 3.8A; (=100%)
Temperature inside the box
30.3°C
31.7°C
Temperature outside the box
21°C
21°C
Temperature rise
9.3K
10.7K
