QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
POWER SUPPLY
AC 100-240V Wide-range Input
Width only 32mm
Efficiency up to 90%
150% (120W) Peak Load Capability
Easy Fuse Tripping due to High Overload Current
Negligible low Inrush Current Surge
Short-term Operation down to 60Vac and up to 300Vac
Full Power Between -25°C and +60°C
Quick-connect Spring-clamp Terminals
3 Year Warranty
GENERAL DESCRIPTION
SHORT-FORM DATA
The most outstanding features of this Dimension QSeries DIN-rail power supply are the high efficiency and
the small size, which are achieved by a synchronous
rectification and further novel design details. The QSeries is part of the Dimension family, existing alongside
the lower featured C-Series.
Output voltage
Adjustment range
Output current
With short-term peak power capability of 150% and
built-in large sized output capacitors, these features
help start motors, charge capacitors and absorb reverse
energy and often allow a unit of a lower wattage class
to be used.
High immunity to transients and power surges as well as
low electromagnetic emission makes usage in nearly
every environment possible.
The integrated output power manager, a wide range
input voltage design and virtually no input inrush
current make installation and usage simple. Diagnostics
are easy due to a green DC-ok LED and red overload
LED.
DC 24V
24 - 28V
3.4 – 3.0A
5 – 4.5A
Output power
80W
120W
Output ripple
< 50mVpp
Input voltage
AC 100-240V
Mains frequency
50-60Hz
AC Input current
1.42 / 0.82A
Power factor
0.53 / 0.47
AC Inrush current
typ. 5 / 10A peak
Efficiency
88.7 / 90.0%
Losses
10.4 / 9.1W
Temperature range -25°C to +70°C
Derating
2W/°C
Hold-up time
typ. 41 / 174ms
Dimensions
32x124x102mm
continuous
for typ. 4s
continuous
for typ. 4s
20Hz to 20MHz
±15%
±6%
at 120 / 230Vac
at 120 / 230Vac
at 120 / 230Vac
at 120 / 230Vac
at 120 / 230Vac
operational
+60 to +70°C
at 120 / 230Vac
WxHxD
Unique quick-connect spring-clamp terminals allow a
safe and fast installation and a large international
approval package for a variety of applications makes
this unit suitable for nearly every situation.
ORDER NUMBERS
Power Supply
MARKINGS
QS3.241
Mechanical Accessory
ZM1.WALL
ZM11.SIDE
UL508
UL 60950-1
Class I Div 2
Wall mount bracket
Side mount bracket
Marine
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
1/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
INDEX
Page
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Intended Use .......................................................3
Installation Requirements ...................................3
AC-Input...............................................................4
DC-Input...............................................................5
Input Inrush Current ...........................................5
Output .................................................................6
Hold-up Time .......................................................8
Efficiency and Power Losses................................9
Reliability ...........................................................10
Functional Diagram...........................................11
Terminals and Wiring ........................................11
Front Side and User Elements ...........................12
EMC ....................................................................13
Environment ......................................................14
Protection Features ...........................................15
Safety Features ..................................................15
Dielectric Strength ............................................15
Approvals and Fulfilled Standard .....................16
Regulatory Compliance .....................................17
Physical Dimensions and Weight ......................18
Page
21. Accessories ........................................................ 19
21.1. ZM1.WALL Wall Mounting Bracket ....... 19
21.2. ZM11.SIDE Side Mounting Bracket ........ 19
21.3. UF20.241 Buffer Module .......................... 20
21.4. YRM2.DIODE Redundancy Module.......... 20
22. Application Notes ............................................. 21
22.1. Repetitive Pulse Loading .......................... 21
22.2. Peak Current Capability ........................... 22
22.3. Back-feeding Loads .................................. 22
22.4. External Input Protection ......................... 22
22.5. Charging of Batteries ............................... 23
22.6. Parallel Use to Increase Output Power .... 23
22.7. Parallel Use for Redundancy .................... 23
22.8. Daisy Chaining of Outputs ....................... 24
22.9. Series Operation ....................................... 24
22.10. Inductive and Capacitive Loads................ 24
22.11. Operation on Two Phases ........................ 25
22.12. Use in a Tightly Sealed Enclosure ............ 25
22.13. Mounting Orientations ............................ 26
The information given in this document is correct to the best of our knowledge and experience at the time of
publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of the
word. As the state of our knowledge and experience is constantly changing, the information in this data sheet is
subject to revision. We therefore kindly ask you to always use the latest issue of this document (available under
www.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.
TERMINOLOGY AND ABREVIATIONS
PE and
symbol
Earth, Ground
PE is the abbreviation for Protective Earth and has the same meaning as the symbol
.
This document uses the term “earth” which is the same as the U.S. term “ground”.
T.b.d.
To be defined, value or description will follow later.
AC 230V
A figure displayed with the AC or DC before the value represents a nominal voltage with
standard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)
230Vac
A figure with the unit (Vac) at the end is a momentary figure without any additional
tolerances included.
50Hz vs. 60Hz
As long as not otherwise stated, AC 230V parameters are valid at 50Hz mains frequency.
may
A key word indicating flexibility of choice with no implied preference.
shall
A key word indicating a mandatory requirement.
should
A key word indicating flexibility of choice with a strongly preferred implementation.
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
2/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
1. 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 end-application.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.
2. INSTALLATION REQUIREMENTS
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 6A B- or 4A 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.
WARNING Risk of electrical shock, fire, personal injury or death.
- Do not use the power supply without proper grounding (Protective Earth). Use the terminal on the input block for earth
connection and not one of the screws on the housing.
- Turn power off before working on the device. Protect against inadvertent re-powering.
- Make sure that the wiring is correct by following all local and national codes.
- Do not modify or repair the unit.
- Do not open the unit as high voltages are present inside.
- 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.
Notes for use in hazardous location areas:
The device is suitable for use in Class I Division 2 Groups A, B, C, D locations.
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.
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
3/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
3. AC-INPUT
AC input
nom.
Allowed voltage L or N to earth
Input frequency
Turn-on voltage
Shut-down voltage
max.
nom.
typ.
typ.
AC 100-240V
85-276Vac
60-85Vac
276-300Vac
276Vac
50–60Hz
61Vac
58Vac
Input current
Power factor *)
Crest factor **)
Start-up delay
Rise time
typ.
typ.
typ.
typ.
typ.
typ.
max.
AC 100V
1.67A
0.55
3.33
360ms
6ms
20ms
100mV
Turn-on overshoot
suitable for TN-, TT- and IT mains networks
continuous operation
full power for 200ms, no damage between 0 and 85Vac
< 500ms
continuous, IEC 62103
±6%
steady-state value, see Fig. 3-1
steady-state value, see Fig. 3-1
AC 120V
1.42A
0.53
3.9
350ms
5ms
20ms
100mV
AC 230V
0.82A
0.47
3.88
330ms
7ms
22ms
100mV
at 24V, 3.4A, see Fig. 3-3
at 24V, 3.4A, see Fig. 3-4
at 24V, 3.4A
see Fig. 3-2
0mF, 24V, 3.4A, see Fig. 3-2
3.4mF, 24V, 3.4A, see Fig. 3-2
see Fig. 3-2
*) The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.
**) The crest factor is the mathematical ratio of the peak value to RMS value of the input current waveform.
Rated
input range
Shut-down
full
power
for
200ms
max.
500ms
Turn-on
POUT
Fig. 3-2 Turn-on behavior, definitions
60V
- 5%
Output
Voltage
VIN
Start-up
delay
Rise
Time
276V 300Vac
85V
Fig. 3-3 Input current vs. output load at 24V
1.8A
Input
Voltage
Overshoot
Fig. 3-1 Input voltage range
Input
Current, typ.
c
Va
0
10
Vac
120
1.5
1.2
c
0Va
0.9
23
0.6
Fig. 3-4 Power factor vs. output load
Power
Factor, typ.
0.6
Vac
0.55
100
ac
0.5
120V
0.45
230Vac
0.4
0.3
Output Current
0
0.5
1.0
1.5
2.0
2.5
3.0 3.5A
Output Current
0.35
0.5
1.0
1.5
2.0
2.5
3.0 3.5A
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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4/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
4. DC-INPUT
DC input
DC input range
DC input current
Allowed Voltage L/N to Earth
Turn-on voltage
Shut-down voltage
nom.
typ.
max.
typ.
typ.
DC 110-300V
88-375Vdc
0.8A / 0.29A
375Vdc
61Vdc
47Vdc
Instructions for DC use:
a) Use a battery or similar DC source.
For other sources contact PULS
b) Connect +pole to L and –pole to N.
c) Connect the PE terminal to a earth wire or to the machine
ground.
Fig. 4-1 Wiring for DC Input
Battery
+
Power Supply
AC
L
N
PE
-
+
-
-20%/+25%
continuous operation
110Vdc / 300Vdc, at 24V, 3.4A
IEC 62103
steady state value
steady state value
Load
DC
5. INPUT INRUSH CURRENT
An active inrush limitation circuit limits the input inrush current after turn-on of the input voltage and after short
input voltage interruptions.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.
Inrush current
Inrush energy
max.
typ.
max.
AC 100V
6Apeak
4.5Apeak
2A2s
AC 120V
7Apeak
5Apeak
2A2s
AC 230V
13Apeak
10Apeak
2A2s
over entire temperature range
over entire temperature range
over entire temperature range
Fig. 5-1 Input inrush current, typical behavior
Input:
Output:
Ambient:
Upper curve:
Middle curve:
Lower curve:
Time basis:
230Vac
24V, 3.4A
25°C
Input current 5A / DIV
Input voltage 500V / DIV
Output voltage 20V / DIV
100ms / DIV
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
5/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
6. OUTPUT
Output voltage
Adjustment range
Factory setting
Line regulation
Load regulation
Ripple and noise voltage
Output current
Output power
BonusPower® time
BonusPower® recovery time
Overload behaviour
Short-circuit current
Output capacitance
*)
**)
***)
nom.
max.
typ.
max.
max.
max.
nom.
nom.
nom.
24V
24-28V
30V ***)
24.1V
10mV
100mV
50mVpp
3.4A
3A
5A *)
nom.
4.5A *)
nom.
nom.
typ.
min.
max.
typ.
80W / 84W
120W / 126W *)
4s
3s
5s
7s
cont. current
3.5A **)
4.2A **)
5.2A **)
6.0A **)
6.0A **)
1 500µF
min.
max.
min.
max.
max.
typ.
guaranteed
at clockwise end position of potentiometer
±0.2%, at full load, cold unit
60-300Vac
static value, 0A 3.4A
20Hz to 20MHz, 50Ohm
continuously available at 24V, see Fig. 6-1
continuously available at 28V, see Fig. 6-1
short term available BonusPower® *),
at 24V, for typical 4s, see Fig. 6-1
short term available BonusPower® *),
at 28V, for typical 4s, see Fig. 6-1
continuously available at 24V / 28V
short term available BonusPower® *) at 24V / 28V
duration until the output voltage dips, see Fig. 6-2
overload free time to reset power manager, see Fig. 6-3
continuous, load impedance 25mOhm, see Fig. 6-1
continuous, load impedance 25mOhm, see Fig. 6-1
during BonusPower® *), load impedance 25mOhm
during BonusPower® *), load impedance 25mOhm
continuous, load impedance 90% of the adjusted output voltage
E
Overload LED (red)
On, when the voltage on the output terminals is 2000m (6500ft), see Fig. 14-2
IEC 62103, EN 50178, altitudes up to 2000m
altitudes from 2000m to 6000m
IEC 62103, EN 50178, not conductive
5W/1000m or 5°C/1000m
III
II
2
Degree of pollution
*) Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.
**) Do not energize while condensation is present
Fig. 14-1 Output current vs. ambient temp.
Fig. 14-2 Output current vs. altitude
Allowed Output
Wattage at 24V
Allowed Output
Wattage at 24V
120W
120W
for typ. 4s
100
80
80
continuous
60
60
40
40
20
20
Ambient Temperature
0
-25
0
20
40
for typ. 4s
100
continuous
A... Tamb < 60°C
B... Tamb < 50°C
C... Tamb < 40°C
0
60 70°C
A
0
2000
B
C
Altitude
4000
6000m
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
14/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
15. PROTECTION FEATURES
Output protection
Output over-voltage protection
Electronically protected against overload, no-load and short-circuits *)
typ. 34Vdc
In case of an internal power supply defect, a redundant
max. 36Vdc
circuit limits the maximum output voltage. The output
shuts down and automatically attempts to restart.
IP 20
EN/IEC 60529
> 3.5mm
e.g. screws, small parts
yes
Output shut-down with automatic restart
MOV (Metal Oxide Varistor)
T4A H.B.C.
not user replaceable
Degree of protection
Penetration protection
Over-temperature protection
Input transient protection
Internal input fuse
*)
In case of a protection event, audible noise may occur.
16. SAFETY FEATURES
Input / output separation *)
Class of protection
Isolation resistance
PE resistance
Touch current (leakage current)
*)
SELV
PELV
I
> 5MOhm
< 0.1Ohm
typ. 0.11mA / 0.26mA
typ. 0.15mA / 0.38mA
typ. 0.25mA / 0.63mA
< 0.14mA / 0.31mA
< 0.20mA / 0.46mA
< 0.35mA / 0.8mA
IEC/EN 60950-1
IEC/EN 60204-1, EN 50178, IEC 62103, IEC 60364-4-41
PE (Protective Earth) connection required
input to output, 500Vdc
100Vac, 50Hz, TN-,TT-mains / IT-mains
120Vac, 60Hz, TN-,TT-mains / IT-mains
230Vac, 50Hz, TN-,TT-mains / IT-mains
110Vac, 50Hz, TN-,TT-mains / IT-mains
132Vac, 60Hz, TN-,TT-mains / IT-mains
264Vac, 50Hz, TN-,TT-mains / IT-mains
double or reinforced insulation
17. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground. Type and factory tests are conducted by
the manufacturer. Field tests may be conducted in the field using the appropriate test equipment which applies the
voltage with a slow ramp (2s up and 2s down). Connect all input-terminals together as well as all output poles before
conducting the test. When testing, set the cut-off current settings to the value in the table below.
Type test
60s
A
2500Vac
B
3000Vac
C
500Vac
Factory test
5s
2500Vac
2500Vac
500Vac
Field test
5s
2000Vac
2000Vac
500Vac
> 4mA
> 4mA
> 4mA
Fig. 17-1 Dielectric strength
Input
L
N
B
Output
A
Earth, PE
+
C
-
Cut-off current setting
To fulfil the PELV requirements according to EN60204-1 § 6.4.1, we
recommend that either the + pole, the – pole or any other part of
the output circuit shall be connected to the protective earth
system. This helps to avoid situations in which a load starts
unexpectedly or can not be switched off when unnoticed earth
faults occur.
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
15/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
18. APPROVALS AND FULFILLED STANDARD
UL Certificate
Listed equipment for category NMTR - Industrial Control Equipment
Applicable for US and Canada
E-File: E198865
CB Scheme Certificate
General safety requirements for Information Technology Equipment (ITE)
UL 508
IEC 60950-1
UL 60950-1
ANSI / ISA 12.12.012007
(Class I Div 2)
Marine
Marine
SEMI F47
Corrosion
IEC 60068-2-60
Method 4
Corrosion
G3-ISA-71.04
VDMA 24364
LABS
VDMA 24364-C1-L/W
UL Certificate
Recognized component for category QQGQ - Information Technology
Equipment (ITE)
Applicable for US and Canada
E-File: E137006
CSA Certificate
Power Supplies for Hazardous Location
Applicable for Canada and US
CSA Class: 5318-01 (Canada), 5318-81 (USA)
Temperature Code: T4
Groups: A, B, C and D
DNV-GL Certificate
DNV-GL Type approved product
Certificate: TAA00002JT
Temperature: Class D
Humidity: Class B
Vibration: Class C
EMC: Class A
Enclosure: Class A
ABS Design Assessment Certificate
ABS (American Bureau of Shipment) assessed product
Certificate: 17-HG1599236-PDA
Test Report
Voltage Sag Immunity for Semiconductor Processing Equipment
Tested for AC 120V and 208V L-L or L-N mains voltages, nominal output
voltage and nominal output load
Manufacturer's Declaration (Online Document)
IEC 60068-2-60 - Environmental Tests, Flowing Mixed Gas Corrosion Test
Test Ke - Method 4
H2S: 10ppb
NO2: 200ppb
Cl2: 10ppb
SO2: 200ppb
Test Duration: 3 weeks, which simulates a service life of at least 10 years
Manufacturer's Declaration (Online Document)
Airborne Contaminants Corrosion Test
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, which simulates a service life of at least 10 years.
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W for
solvents and water-based paints
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
16/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
19. REGULATORY COMPLIANCE
EU Declaration of
Conformity
The CE mark indicates conformance with the
- EMC directive
- Low-voltage directive (LVD)
- RoHS directive
Manufacturer's Statement
EU-Directive regarding the Registration, Evaluation, Authorisation
and Restriction of Chemicals
Registration for the Eurasian Customs Union market
(Russia, Kazakhstan, Belarus)
REACH Directive
EAC TR Registration
IEC 61558-2-16
(Annex B)
Safety Isolation
Transformer
Test Certificate
IEC 61558-2-16 - Safety of transformers, reactors, power supply
units and similar products for supply voltages up to 1100 V
Particular requirements and tests for switch mode power supply
units and transformers for switch mode power supply units
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
17/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
20. PHYSICAL DIMENSIONS AND WEIGHT
Weight
DIN-Rail
Installation Clearances
440g / 0.97lb
Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
The DIN-rail height must be added to the unit depth (102mm) to calculate the total required
installation depth.
See chapter 2
Fig. 21-1 Front view
Fig. 21-2 Side view
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
18/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
21. ACCESSORIES
21.1. ZM1.WALL WALL MOUNTING BRACKET
This bracket is used to mount the power
supply onto a flat surface without utilizing a DIN-Rail.
21.2. ZM11.SIDE SIDE MOUNTING BRACKET
This bracket is used to mount Dimension units sideways with or without utilizing a DIN-Rail. The two aluminum
brackets and the black plastic slider of the unit have to be detached, so that the steel brackets can be mounted.
For sideway DIN-rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on
the steel bracket.
Side mounting with DIN-rail brackets
Side mounting without DIN-rail brackets
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
19/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
21.3. UF20.241 BUFFER MODULE
This buffer unit is a supplementary device for DC 24V power supplies. It delivers power to bridge typical mains failures
or extends the hold-up time after turn-off
Buffer
Power
of the AC power. In times when the power
Load
AC
Unit(s)
Supply
supply provides sufficient voltages, the
buffer unit stores energy in integrated
+
DC
electrolytic capacitors. In case of mains
voltage fault, this energy is released again
in a regulated process. One buffer module can deliver 20A additional current.
The buffer unit does not require any control wiring. It can be added in parallel to
the load circuit at any given point. Buffer units can be added in parallel to increase
the output ampacity or the hold-up time.
21.4. YRM2.DIODE REDUNDANCY MODULE
The YRM2.DIODE is a dual redundancy module, which has two
diodes as decoupling devices
included. It can be used for
various purposes. The most
popular application is to
configure highly reliable and
true redundant power supply
systems. Another interesting
application is the separation of
sensitive loads from nonsensitive loads. This avoids the
distortion of the power quality
for the sensitive loads which
can cause controller failures.
Failure
Monitor
++
--
24V,3.4A
QS3.241
Power
Supply
L N PE
+ - + IN 1 IN 2
++
IN 1 IN 2
YRM2.DIODE
Redundancy Module
Output
+ -
--
24V,3.4A
QS3.241
Power
Supply
L N PE
optional
I
I
24V,3.4A
Load
L
N
PE
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
20/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
22. APPLICATION NOTES
22.1. REPETITIVE PULSE LOADING
Typically, a load current is not constant and varies over time. This power supply is designed to support loads with a
higher short-term power demand (=BonusPower®). The short-term duration is hardware controlled by an output
power manager and is available on a repeated basis. If the BonusPower® load lasts longer than the hardware
controller allows it, the output voltage will dip and the next BonusPower® is available after the BonusPower® recovery
time (see chapter 6) has elapsed.
To avoid this, the following rules must be met:
a) The power demand of the pulse must be below 150% of the nominal output power.
b) The duration of the pulse power must be shorter than the allowed BonusPower® time. (see output section)
c)
The average (R.M.S.) output current must be below the specified continuous output current.
If the R.M.S. current is higher, the unit will respond with a thermal shut-down after a period of time. Use the
maximum duty cycle curve (Fig. 23-2) to check if the average output current is below the nominal current.
Fig. 23-1 Repetitive pulse loads, definitions
Fig. 23-2 Max. duty cycle curve
1.0
PPEAK TPEAK
DutyCycle
max.
150%
0.6
100%
0.4
P0
P0 = 100%
0.2
0
100
P0
PPEAK
T0
TPEAK
Example:
P0 = 10%
P0 = 50%
P0 = 75%
0.8
T0
Base load (W)
Pulse load (above 100%)
Duration between pulses (s)
Pulse duration (s)
110
DutyCycle =
T0 =
120
130
PPEAK
140
150%
Tpeak
Tpeak + T0
Tpeak - (DutyCycle x Tpeak)
DutyCycle
A load is powered continuously with 40W (= 50% of the rated output load). From time to time a peak
power of 120W (= 150% of the rated output load) is needed for 1 second.
The question is: How often can this pulse be supplied without overloading the power supply?
- Make a vertical line at PPEAK = 150% and a horizontal line where the vertical line crosses the P0 = 50%
curve. Read the max. duty cycle from the duty cycle-axis (= 0.37)
- Calculate the required pause (base load) length T0:
- Result: The required pause length = 1.7s
T0=
- Max. repetition rate = pulse +pause length = 2.7s
Tpeak - (DutyCycle x Tpeak)
DutyCycle
=
1s - (0.37 x 1s)
0.37
= 1.7s
More examples for pulse load compatibility:
PPEAK
120W
120W
100W
P0
80W
0W
40W
TPEAK
1s
1s
1s
T0
>25s
>1.3s
> 0.75s
PPEAK
120W
120W
120W
P0
40W
40W
40W
TPEAK
0.1s
1s
3s
T0
>0.16s
>1.6s
>4.9s
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
21/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
22.2. PEAK CURRENT CAPABILITY
Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. The inrush current
demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal
output current (including the PowerBoost). The same situation applies when starting a capacitive load.
Branch circuits are often protected with circuit breakers or fuses. In case of a short or an overload in the branch circuit,
the fuse needs a certain amount of over-current to trip or to blow. The peak current capability ensures the safe
operation of subsequent circuit breakers.
Assuming the input voltage is turned on before such an event, the built-in large sized output capacitors inside the
power supply can deliver extra current. Discharging this capacitor causes a voltage dip on the output. The following
two examples show typical voltage dips:
Fig. 23-3 Peak load with 2x the nominal
current for 50ms, typ.
Peak load 6.8A (resistive) for 50ms
Output voltage dips from 24V to 18.5V.
Fig. 23-4 Peak load with 4x the nominal
current for 5ms, typ.
Peak load 13.5A (resistive) for 5ms
Output voltage dips from 24V to 7.5V.
22.3. BACK-FEEDING LOADS
Loads such as decelerating motors and inductors can feed voltage back to the power supply. This feature is also called
return voltage immunity or resistance against Back- E.M.F. (Electro Magnetic Force).
This power supply is resistant and does not show malfunctioning when a load feeds back voltage to the power supply.
It does not matter whether the power supply is on or off.
The maximum allowed feed-back-voltage is 35Vdc. The absorbing energy can be calculated according to the built-in
large sized output capacitor which is specified in chapter 6.
22.4. EXTERNAL INPUT PROTECTION
The unit is tested and approved for branch circuits up to 20A. An external protection is only required if the supplying
branch has an ampacity greater than this. Check also local codes and local requirements. In some countries local
regulations might apply.
If an external fuse is necessary or utilized, minimum requirements need to be considered to avoid nuisance tripping of
the circuit breaker. A minimum value of 6A B- or 6A C-Characteristic breaker should be used
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
22/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
22.5. CHARGING OF BATTERIES
The power supply can be used to charge lead-acid or maintenance free batteries. (Two 12V batteries in series)
Instructions for charging batteries:
a)
Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge
voltage.
End-of-charge voltage
27.8V
27.5V
27.15V
26.8V
Battery temperature
10°C
20°C
30°C
40°C
b)
Use a 15A or 16A circuit breaker (or blocking diode) between the power supply and the battery.
c)
Ensure that the output current of the power supply is below the allowed charging current of the battery.
d)
Use only matched batteries when putting 12V types in series.
e)
The return current to the power supply (battery discharge current) is typ. 6.3mA when the power supply is
switched off (except in case a blocking diode is utilized).
22.6. PARALLEL USE TO INCREASE OUTPUT POWER
Unit A
Power supplies from the same series (Q-Series) can be paralleled to increase
the output power. The output voltage shall be adjusted to the same value
(±100mV) with the same load conditions on all units, or the units can be left
with the factory settings.
AC
+
-
DC
If more than three units are connected in parallel, a fuse or circuit breaker
with a rating of 4A or 6A is required on each output. Alternatively, a diode or
redundancy module can also be utilized.
+
Unit B
Load
AC
+
-
-
Keep an installation clearance of 15mm (left / right) between two power
DC
supplies and avoid installing the power supplies on top of each other. Do not
use power supplies in parallel in mounting orientations other than the standard mounting orientation (input terminals
on bottom and output terminals on the top of the unit) or in any other condition where a derating of the output
current is required (e.g. altitude, above 60°C, …).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
22.7. PARALLEL USE FOR REDUNDANCY
Power supplies can be paralleled for redundancy to gain higher
system availability. Redundant systems require a certain amount
of extra power to support the load in case one power supply
unit fails. The simplest way is to put two power supplies in
parallel. This is called a 1+1 redundancy. In case one power
supply unit fails, the other one is automatically able to support
the load current without any interruption. Redundant systems
for a higher power demand are usually built in a N+1 method.
E.g. five power supplies, each rated for 3.4A are paralleled to
build a 13.6A redundant system. For N+1 redundancy the same
restrictions apply as for increasing the output power, see also
section 23.6.
Please note: This simple way to build a redundant system does
not cover failures such as an internal short circuit in the
secondary side of the power supply. In such a case, the defective
Failure
Monitor
++
--
24V,3.4A
QS3.241
Power
Supply
L N PE
+ - + IN 1 IN 2
++
IN 1 IN 2
YRM2.DIODE
Redundancy Module
Output
+ -
--
24V,3.4A
QS3.241
Power
Supply
L N PE
optional
I
I
24V,3.4A
Load
L
N
PE
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
23/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
unit becomes a load for the other power supplies and the output voltage can not be maintained any more. This can be
avoided by utilizing decoupling diodes which are included in the redundancy module YRM2.DIODE.
Recommendations for building redundant power systems:
a)
b)
c)
Use separate input fuses for each power supply.
Monitor the individual power supply units. Therefore, use the Input-OK relay contact of the YRM2.DIODE
redundancy module.
It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.
22.8. DAISY CHAINING OF OUTPUTS
Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current
through one terminal pin does not exceed 13A. If the current is higher, use a separate distribution terminal block as
shown in Fig. 23-6.
Fig. 23-5 Daisy chaining of outputs
Fig. 23-6 Using distribution terminals
max 13A!
Output
+ +
- -
Output
+ +
- -
+
-
Load
Output
+ +
- -
Output
+ +
- -
Power
Supply
Power
Supply
Power
Supply
Power
Supply
Input
Input
Input
Input
22.9. SERIES OPERATION
-
+
Load
Distribution
Terminals
Unit A
AC
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 are not SELV any more and can be dangerous.
Such voltages must be installed with a protection against touching.
DC
+
+
Unit B
AC
Earthing of the output is required when the sum of the output voltage is
above 60Vdc.
DC
Avoid return voltage (e.g. from a decelerating motor or battery) which is
applied to the output terminals.
Load
+
-
Earth
(see notes)
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 bottom and output terminals on the top of the unit).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
22.10. INDUCTIVE AND CAPACITIVE LOADS
The unit is designed to supply any kind of loads, including unlimited capacitive and inductive loads.
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Germany
24/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
22.11. OPERATION ON TWO PHASES
Power Supply
L1
240V +15% max.
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+15%. Use a fuse or a circuit breaker to protect the N
input. The N input is internally not protected and is in this case connected to
a hot wire. Appropriate fuses or circuit breakers are specified in section 23.4
“External Input Protection”.
L3
AC
L
Fuse
L2
internal
fuse
N
PE
DC
22.12. 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 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:
Load:
Input:
Temperature inside enclosure:
Temperature outside enclosure:
Temperature rise:
Rittal Typ IP66 Box PK 9516 100, plastic, 110x180x165mm
24V, 3.4A; (=100%) load is placed outside the box
230Vac
41.3°C (in the middle of the right side of the power supply with a distance of 2cm)
25.1°C
16.2K
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
25/26
QS3.241
24V, 3.4A, SINGLE PHASE INPUT
Q-Series
22.13. MOUNTING ORIENTATIONS
Mounting orientations other than input terminals on the bottom and output on the top require a reduction in
continuous output power or a limitation in the maximum allowed ambient temperature. The amount of reduction
influences the lifetime expectancy of the power supply. Therefore, two different derating curves for continuous
operation can be found below:
Curve A1
Curve A2
Recommended output current.
Max allowed output current (results in approximately half the lifetime expectancy of A1).
Fig. 23-7
Mounting
Orientation A
(Standard
orientation)
Output Current
OUTPUT
3.5A
2.8
2.1
1.4
0.7
0
10
Power
Supply
INPUT
Fig. 23-8
Mounting
Orientation B
(Upside down)
20
30
40
50
60°C
INPUT
3.5A
2.8
2.1
1.4
0.7
0
10
A2
A1
Ambient Temperature
20
30
50
40
60°C
Power
Supply
OUTPUT
Output Current
3.5A
2.8
2.1
1.4
0.7
0
10
A2
A1
Ambient Temperature
20
30
40
50
60°C
Output Current
OUTPUT
Power
Supply
INPUT
3.5A
2.8
2.1
1.4
0.7
0
10
A2
A1
Ambient Temperature
20
30
50
40
60°C
INPUT
Power
Supply
Output Current
OUTPUT
Fig. 23-11
Mounting
Orientation E
(Horizontal ccw)
Ambient Temperature
Output Current
Fig. 23-9
Mounting
Orientation C
(Table-top
mounting)
Fig. 23-10
Mounting
Orientation D
(Horizontal cw)
A1
3.5A
2.8
2.1
1.4
0.7
0
10
A2
A1
Ambient Temperature
20
30
40
50
60°C
Jul. 2020 / Rev. 2.3 DS-QS3.241-EN
All parameters are specified at 24V, 3.4A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0
Germany
26/26
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