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QS5.241-A1 Installation Manual
EN
Product Description
The QS5.241-A1 is a DIN-rail mountable single-phase-input power supply, which provides a floating,
stabilized and galvanically separated SELV/PELV output voltage.
The device is equipped with conformal coated pc-boards for use in ATEX/IECEx hazardous location
areas.
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 malfunction may cause severe personal injury or threaten human life.
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.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or
frost allowed.
The enclosure of the device provides a degree of protection of IP20.
The isolation of the device is designed to withstand impulse voltages of overvoltage category 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- and IT mains networks. The voltage between the L
or N terminal and the PE terminal must not exceed 264Vac continuously.
The input can also be powered from batteries or similar DC sources. The voltage between the input
terminal and the PE terminal must not exceed 375Vdc continuously.
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 6000m (19685ft). See additional requirements in the product
datasheet for use above 2000m (6560ft).
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 30A (UL) and 32A (IEC) without
additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6A
B- or 3A C-Characteristic 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 and for use in Group II
Category 3 (Zone 2) environments.
Hazardous Location Classification: ATEX: EPS 09 ATEX 1 236 X, II 3G EX ec nC IIC T4 Gc
Do not use in mounting orientations other than the input terminals on bottom of the unit.
Do not use with DC input voltages or above +60°C ambient.
WARNING EXPLOSION HAZARDS!
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.
A suitable enclosure must be provided for the end product which has a minimum protection of IP54
and fulfils the requirements of the EN 60079-0.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive loads and capacitive loads.
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 or in case
of a short circuit in the output. The LED is flashing, when the device has switched off due to over-
temperature. Input voltage 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.
The device is designed to deliver 7.5A output current for up to 4s with nominal output voltage.
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. If more than three
devices are connected in parallel, a diode, fuse or circuit breaker with a rating of 10A 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 36V. The output
shuts down and automatically attempts to restart.
Technical Data
All values are typical figures specified at 230Vac 50Hz input voltage, 24V
5A output, 25°C ambient temperature and after a 5 minutes run-in time
unless otherwise noted.
Output voltage
DC 24V
Adjustment range
24 – 28Vdc
Output current
Continuous:
5.0 – 4.5A
3.8 – 3.4A
Short-term, up to 4s:
7.5 – 6.7A
Derate linearly between +60°C and +70°C
Input voltage AC
AC 100 - 240V
Mains frequency
50 – 60Hz
Input current AC
1.1 / 0.62A
Power factor
0.99 / 0.91
Input voltage DC
DC 110 - 300V
Input current DC
1.19 / 0.44A
Input inrush current
9 / 11A pk
Efficiency
91.6 / 92.7%
Power losses
11.0 / 9.4W
Hold-up time
34 / 65ms
Temperature range
-25 to +70°C
Max. wire size (litz wire)
4mm²
Wire size AWG
AWG 20-10
Max. wire diameter
2.8mm
Wire stripping length
10mm / 0.4inch
Max. wire size (litz wire)
2.5mm²
Wire size AWG
AWG 26-12
Max. wire diameter
2.3mm
Wire stripping length
6mm / 0.25inch
Size (wxhxd)
40x124x117mm
Weight
620g / 1.37lb
Functional Diagram
L
Input Fuse
Input Filter
PFC
N
Input Rectifier
Converter
Inrush Current
Limiter
Temper-
Output
Output
ature
Over-
Power
Shut-
Voltage
Manager
down
Protection
Output Characteristic
Output voltage
Adjustment range
28V
24V
12V
A: continuous
B: up to 4s
0V
0A
2A
4A
Temperature Range
Allowed output current at 24V
7.5A
5A
3.75A
A: continuous
B: up to 4s
0A
-25
0
Nominal
Factory setting 24.1V
Below +60°C ambient
At +70°C ambient
Below +70°C ambient
-15%/+10%
±6%
At 120 / 230Vac
At 120 / 230Vac
±20%
At 110 / 300Vdc
At 40°C, 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac
At 120 / 230Vac
Input terminals
Input terminals
Input terminals
Input terminals
Output/DC-OK terminals
Output/DC-OK terminals
Output/DC-OK terminals
Output/DC-OK terminals
Without DIN-rail
Voltage
V
Regulator
OUT
+
+
Power
Output
Converter
Filter
-
-
Overload
LED
DC-OK
LED
13
DC-ok
DC-OK
Relay
14
Contact
B
A
6A
8A
10A
Output current
+60
+70°C
Ambient temperature
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