PULS QS20.241, QS20.241-C1 Power Supply 480W 1 Phase Instruction Manual
- June 9, 2024
- PULS
Table of Contents
QS20.241-C1 Power Supply 480W 1 Phase
Instruction Manual
QS20.241 QS20.241C1 Power Supply 480W 1 Phase
Read this first!
Before operating this device, please read this manual thoroughly and retain
this manual for future reference! This device may only be installed and put
into operation by qualified personnel. If damage or malfunction should occur
during operation, immediately turn power off and send device to the factory
for inspection. The device does not contain serviceable parts. The information
presented in this document is believed to be accurate and reliable and may
change without notice. For any clarifications the English translation will be
used.
WARNING
Risk of electrical shock, fire, personal injury, or death:
– Turn power off before working on the device. Protect against inadvertent re-
powering.
– Do not open, modify or repair the device.
– Use caution to prevent any foreign objects from entering the housing.
– Do not use in wet locations or in areas where moisture or condensation can
be expected.- Do not touch during power-on and immediately after power-off.
Hot surfaces may cause burns.
Product Description
The QS20.241 is a DIN-rail mountable single-phase-input power supply, which
provides a floatingstabilized and galvanically separated SELV/PELV output
voltage.
The QS20.241-C1 device is the same as the QS20.241 but with conformal coated
pc-boards.
Intended Use
This device is designed for installation in an enclosure and is intended for
commercial use, such as in industrial control, process control, monitoring and
measurement equipment or the like. Do not use this device in equipment, where
malfunctioning may cause severe personal injury or threaten human life without
additional appropriate safety devices, that are suited for the endapplication.
If this device is used in a manner outside of its specification, the
protection provided by the device maybe impaired.
Installation Instructions
Install device in an enclosure providing protection against electrical,
mechanical and fire hazards. Install the device onto a DIN-rail according to
EN 60715 with the input terminals on the bottom of the device. Other mounting
orientations require a reduction in output current.
Make sure that the wiring is correct by following all local and national
codes. Use appropriate copper cables that are designed for a minimum operating
temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient
temperatures up to +60°C and 90°C for ambient temperatures up to +70°C. Ensure
that all strands of a stranded wire enter the terminal connection. Use
ferrules for wires on the input terminals.
The device is designed for pollution degree 2 areas in controlled
environments. No condensation or frost is allowed.
The enclosure of the device provides a degree of protection of IP20. The
housing does not provide protection against spilled liquids. The device is
designed for overvoltage category II zones. Below 2000m altitude the device is
tested for impulse withstand voltages up to 4kV, which corresponds to OVC III
according to IEC 60664-1. The device is designed as “Class of Protection I”
equipment according to IEC 61140.
Do not use without a proper PE (Protective Earth) connection. The device is
suitable to be supplied from TN, TT or IT mains networks. The continuous
voltage between the input terminal and the PE potential must not exceed
276Vac. The input can also be powered from batteries or similar DC sources.
The continuous voltage between the supply voltage and the PE/ground potential
must not exceed 375Vdc.
A disconnecting means shall be provided for the input of the device. The
device is designed for convection cooling and does not require an external
fan. Do not obstruct airflow and do not cover ventilation grid! The device is
designed for altitudes up to 5000m (16400ft). Above 2000m (6560ft) a reduction
in output current is required. Keep the following minimum installation
clearances: 40mm on top, 20mm on the bottom, 5mm left and right side. Increase
the 5mm to 15mm in case the adjacent device is a heat source. When the device
is permanently loaded with less than 50%, the 5mm can be reduced to zero. The
device is designed, tested and approved for branch circuits up to 20A without
additional protection device. If an external fuse is utilized, do not use
circuit breakers smaller than 10A B- or CCharacteristic to avoid a nuisance
tripping of the circuit breaker. The maximum surrounding air temperature is
+70°C (+158°F).
The operational temperature is the same as the ambient or surrounding air
temperature and is defined 2cm below the device. The device is designed to
operate in areas between 5% and 95% relative humidity.
Installation Instructions for Hazardous Location Areas
The device is suitable for use in Class I Division 2 Groups A, B, C, D
locations.
Substitution of components may impair suitability for this environment.
Do not disconnect the device or operate the voltage adjustment unless power
has been switched off or the area is known to be non-hazardous.
Functional Description
The output is electronically protected against no-load, overload and short
circuit and can supply any kind of loads, including unlimited inductive or
capacitive loads. At heavy overloads (when output voltage falls below 20V),
the device delivers continuous output current for 2s. After this, the output
is switched off for approximately 17s before a new start attempt is
automatically performed. This cycle is repeated as long as the overload
exists.
Do not apply return voltages from the load to the output terminals higher than
35V.
The output voltage can be adjusted with a small flat-blade screwdriver behind
the flap on the front. The green DC OK LED reports an output voltage above 90%
of the adjusted voltage of a running device.
The DC OK relay monitors the output voltage and the contact is closed when the
DC OK LED is on. Contact ratings: 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A for
resistive loads.
The red overload LED is on, when the output voltage falls below 90% of the
adjusted value. The LED is flashing, when the device is in short circuit mode
or has switched due to over-temperature. Inputvoltage is required.
The device is equipped with an over-temperature protection. In case of a high
temperature, the output shuts down and starts automatically again after
cooling off.
Devices can be paralleled to increase the output power. The ambient
temperature is not allowed to exceed +60°C. The output voltage shall be
adjusted to the same value (±100mV) with the same load conditions on all
devices, or the devices can be left with the factory settings. Energize all
units at the same time. It also might be necessary to cycle the input power
(turn-off for at least 17s), if the output was in overload or short circuit.
If more than three devices are connected in parallel, a diode, fuse or circuit
breaker with a rating of 30A or 32A is required on each output.
Same devices can be connected in series for higher output voltages. It is
allowed to connect as many devices in series as needed, providing the sum of
the output voltage does not exceed 150Vdc.
In case of an internal defect, a redundant circuit limits the maximum output
voltage to 37V. The output shuts down and automatically attempts to restart.
Technical Data
All values are typical figures specified at 230Vac 50Hz input voltage, 24V 20A output, 25°C ambient temperature and after a 5 minutes run-in time unless otherwise noted.
| Output voltage | DC 24V | Nominal |
|---|---|---|
| Adjustment range | 24 – 28Vdc | Factory setting 24.1V |
| Output current | Continuous: 20.0 – 17.1A |
15 – 12.8A
Short-term, up to 4s: 30.0 – 26A
Below +70°C ambient
Derate linearly between +60°C and +70°C| Below +60°C ambient
At +70°C ambient
Input voltage AC| AC 100 – 240V| ±15%
Mains frequency| 50 – 60Hz| ±6%
Input current AC| 4.56 / 2.48A| At 120 / 230Vac
Power factor| 0.95 / 0.90| At 120 / 230Vac
Input voltage DC| DC 110 – 150V| -20%/+25%
Input current DC| 4.6A| At 110Vdc
Input inrush current| 9 / 7A pk| At 40°C, 120 / 230Vac
Efficiency| 92.4 / 93.9%| At 120 / 230Vac
Power losses| 39.6 / 31.4W| At 120 / 230Vac
Hold-up time| 32 / 51ms| At 120 / 230Vac
Temperature range| -25 to +70°C|
Max. wire size (litz wire)| 4mm²| Power terminals
Wire size AWG| AWG 20-10| Power terminals
Max. wire diameter| 2.8mm| Power terminals
Wire stripping length| 10mm / 0.4inch| Power terminals
Max. wire size (litz wire)| 2.5mm²| DC-OK terminals
Wire size AWG| AWG 26-12| DC-OK terminals
Max. wire diameter| 2.3mm| DC-OK terminals
Wire stripping length| 6mm / 0.25inch| DC-OK terminals
Size (wxhxd)| 82x124x127mm| Without DIN-rail
Weight| 1200g / 2.65lb|
Functional Diagram
Output Characteristic
Temperature Range
Allowed output current at 24V
Headquarters: PULS GmbH, Elektrastr. 6, 81925 Munich, Germany.
www.pulspower.com
**United Kingdom** +44 1525 841001
The information in this document is believed to be accurate and reliable and
may change without notice.
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