Rockwell Automation Allen-Bradley 1606-XLB120E User manual

Basic Power Supply 5 A
Catalog Number 1606-XLB120E
Reference Manual
Original Instructions

Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are
required to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may
be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circu mstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circu mstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 3
Basic Power Supply 5 A
Table of Contents
Summary of Changes This manual contains new and updated information as indicated in the
following table.
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/global/literature-library/overview.page.
To order paper copies of technical documentation, contact your local
Allen-Bradley distributor or Rockwell Automation sales representative.
Topic Page Topic Page
Additional Resources 3 Hold-up Time 11
Terminology and Abbreviations 4 DC OK Relay Contact 11
Product Overview 5 Efficiency and Power Loss 12
Front Side and User Elements 6 Lifetime Expectancy and Mean Time between
Failure (MTBF)
13
Protection Features 6 Functional Diagram 13
Safety Features 7 EMC 14
Installation Notes 7 Application Notes 15
Terminals and Wiring 7 Specifications 19
Installation Notes 7 Environment 20
Input 8 Dielectric Strength 21
DC-Input 9 Standards Compliance and Certifications 22
Input Inrush Current 9 Approximate Dimensions and Weight 23
Output 10
Topic Page
Corrected dimension information 23
Resource Description
Switched Mode Power Supply Technical Data, publication
1606-TD002
Provides specifications and approximate dimensions
for full line of switched mode power supplies.
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
Provides general guidelines for installing a Rockwell
Automation® industrial system.
Product Certifications website, http://
www.rockwellautomation.com/global/certification/
overview.page
Provides declarations of conformity, certificates, and
other certification details.

4Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Terminology and
Abbreviations Term Definition
230V AC A figure with the unit (V AC) at the end is a momentary figure without any additional
tolerances included.
50 Hz vs. 60 Hz As long as not otherwise stated, AC 100V and AC 230V parameters are valid at 50 Hz
mains frequency. AC 120V parameters are valid for 60 Hz mains frequency.
AC 230V A figure that is displayed with the AC or DC before the value represents a nominal
voltage with standard tolerances included. For example: DC 12V describes a 12V battery,
whether it is full (13.7V) or flat (10V)
Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”.
PE and symbol PE is the abbreviation for Protective Earth and has the same meaning as the symbol.
PELV Protection by extra-low voltage
SELV Safety by extra-low voltage

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 5
Basic Power Supply 5 A
Product Overview 1606-XLB Basic Power Supplies are
compact, industrial grade power supplies that
focus on the essential features needed in
industrial applications.
The housing is made of a high-grade,
reinforced molded material, which permits
the units to be used in ambient temperatures
up to 70 °C (158 °F).
This power supply features a wide input
voltage range, which makes it suitable for
global use.
The addition of a DC-OK signal makes the
power supply ideal for many industry
applications such as: process, automation,
and many other critical applications where
preventive function monitoring can help to
avoid long downtimes.
The 1606-XLB120E power supply offers these features:
• 100…120V/200…240V AC auto-select input
• Cost that is optimized without compromising the quality or reliability
• Small width of 39 mm (1.54 in.) takes up less space on the DIN rail
• Efficiency up to 92.3%
• Full power between -10…+55 °C (14…131 °F)
• DC-OK relay contact included
•1-yearwarranty

6Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Front Side and User Elements
Figure 1 - Front Side of DC-UPS
Protection Features
Letter Description
AInput terminals - (screw terminals)
N, L - Line input
PE - Protective earth input
BOutput terminals - (screw terminals, two pins per pole)
+ Positive output
– Negative (return) output
COutput voltage potentiometer -
Guaranteed adjustment range: 24…28V
Factory set: 24.1V
DDC-OK status indicator- (green) On, when the output voltage is >18V
EDC-OK Relay Contact (push-in terminals)
Attribute 1606-XLB120E
Output protection Electronically protected against overload, no-load, and short circuits
Output overvoltage protection typ 31V DC
max 34V DC
In case of an internal power supply anomaly, a redundant
circuit limits the maximum output voltage. In such a
case, the output shuts down and stays down until the
input voltage is turned off and on again for at least 1
minute or until the green status indicator went off.
Degree of protection IP 20 EN/IEC 60529 Caution: For use in a controlled
environment according to CSA 22.2 No 107.1-01.
Over-temperature protection no
Input transient protection MOV (Metal Oxide Varistor)
Internal input fuse Included Not user replaceable

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 7
Basic Power Supply 5 A
Safety Features
Installation Notes • Use appropriate copper cables that are designed for minimum operating
temperatures of:
– 75 °C (167 °F) for ambient up to 55 °C (131 °F) minimum.
– 90 °C (194 °F) for ambient up to 70 °C (158 °F) minimum.
• Follow national installation codes and installation regulations
• Verify that all strands of a stranded wire enter the terminal connection.
• Do not use the power supply without a PE connection.
• Secure unused terminal compartments tightly.
• Ferrules are allowed.
Terminals and Wiring The terminals are IP20 Fingersafe constructed and suitable for field- and
factory wiring.
Attribute 1606-XLB120E
Input/output separation
double or reinforced insulation
SELV IEC/EN 60950-1
PELV IEC/EN 60204-1, EN 50178, IEC 62103, IEC 60364-4-41
Class of protection I PE (Protective Earth) connection required
Isolation resistance > 100 MOhm Input to output, 500V DC
Touch current
(leakage current)
typ 0.21 mA/0.46 mA 100V AC, 50 Hz, TN-,TT-mains/IT-mains
typ 0.30 mA/0.65 mA 120V AC, 60 Hz, TN-,TT-mains/IT-mains
typ 0.33 mA/0.72 mA 230V AC, 50 Hz, TN-,TT-mains/IT-mains
< 0.27 mA/0.56 mA 110V AC, 50 Hz, TN-,TT-mains/IT-mains
< 0.38 mA/0.78 mA 132V AC, 60 Hz, TN-,TT-mains/IT-mains
< 0.43 mA/0.90 mA 264V AC, 50 Hz, TN-,TT-mains/IT-mains
Attribute Input and Output Terminals DC-OK Signal Terminal
Terminal type Screw terminals Push-in terminals
Solid wire, max 6 mm21.5 mm2
Stranded wire, max 4 mm21.5 mm2
American Wire Gauge AWG 20-10 AWG 28-16
Wire diameter, max including ferrules) 2.8 mm (0.11 in.) 1.6 mm (0.06 in.)
Wire stripping length 7 mm (0.28 in.) 7 mm (0.28 in.)
Screwdriver 3.5 mm (0.14 in.)
slotted or cross-head No 2
Not required
Recommended tightening torque 1 N•m (9 lb•in) Not applicable

8Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Input
Attribute 1606-XLB120E
AC input nom 100…120V/200…240V AC Auto-select, suitable for TN-, TT- and IT mains networks
AC input range min 90…132V AC/180…264V AC continuous operation
min 264…300V AC < 500 ms
Allowed voltage L or N to earth max 300V AC continuous, IEC 62103
Input frequency nom 50…60 Hz ±6%
External input protection See recommendations in External Input Protection on page 16
Attribute AC 100V AC 120V AC 230V
Input current typ 2.0 A 1.72 A 1.05 A at 24V, 5 A, see Figure 3
Power factor(1) typ 0.66 0.64 0.54 at 24V, 5 A, see Figure 5
Crest factor(2) typ 2.7 2.8 3.4 at 24V, 5 A
Turn-on voltage typ 78V AC 78V AC 157V AC at 24V 0 A, steady-state value, see Figure 2
Shut-down voltage typ 68V AC 68V AC 68V AC at 24V 5 A, steady-state value, see Figure 2
Start-up delay typ 400 ms 400 ms 100 ms see Figure 4
Rise time typ 30 ms 30 ms 30 ms at 24V, 5 A const. current load, 0mF load capacitance, see Figure 4
typ 90 ms 90 ms 90 ms at 24V, 5 A const. current load, 5mF load capacitance, see Figure 4
Turn-on overshoot max 200 mV 200 mV 200 mV see Figure 4
(1) The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit.
(2) The crest factor is the mathematical ratio of the peak value to the T ms value of the input current waveform.
Figure 2 - Input Voltage Range, typ Figure 4 - Turn-on Behavior, Definitions
Figure 3 - Input Current vs. Output Load at 24V Figure 5 - Power Factor vs. Output Load
Turn-on
90
Rated input ranges
V
IN
P
OUT
264180
Shut-down
132
Upper
range
Lower
range
300Vac
max.
500ms
Start-up
delay Rise Time
Overshoot
- 5%
Output
Voltage
Input
Voltage
5A
0.5 1 1.5 2 2.5 3 3.5 4 4.5
0
0.3
0.6
0.9
1.2
1.5
1.8
2.2A
Input Current, typ.
b
c
a
Output Current
a) 100Vac
b) 120Vac
c) 230Vac
Power Factor, typ.
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5A
0.45
0.50
0.55
0.60
0.65
0.70
Output Current
a) 100Vac
b) 120Vac
c) 230Vac b
c
a

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 9
Basic Power Supply 5 A
DC-Input Do not operate the power supply with DC-input voltage.
Input Inrush Current A NTC inrush limiter limits the input inrush current after turn-on of the
input voltage.
Attribute AC 100V AC 120V AC 230V Notes
Inrush
current
max 23 A peak 27 A peak 40 A peak 40 °C (104 °F) ambient, cold start
typ 18 A peak 22 A peak 33 A peak
Inrush
energy
typ 13 A peak 16 A peak 30 A peak 25 °C (77 °F) ambient, cold start
max 0.4 A2s0.5A
2s1.5A 2s 40 °C (104 °F) ambient, cold start
Figure 6 - Input Inrush Current, Typical Behavior,
230V AC Input, 24V 5 A Output, 40 °C (104 °F) Ambient
Figure 7 - Input Inrush Current, Zoom Into First Peak
230V AC Input, 24V 5 A Output, 40 °C (104 °F) Ambient
20ms/DIV
Input current 20A/DIV
Input voltage 500V/DIV
Output voltage 20V/DIV
1ms/DIV
Ipeak = 33A
Input current 10A/DIV

10 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Output
Attribute 1606-XLB120E Notes
Output voltage nom DC 24V
Adjustment range min 24…28V guaranteed
max 30V(1) at clockwise end position of potentiometer
Factory settings typ 24.1V ±0.2 %, at full load, cold unit
Line regulation max 10 mV 90…132/180…264V AC
Load regulation max 150 mV static value, 0 A .. 5 A .. 0 A
Ripple and noise
voltage
max 100 mVpp 20 Hz to 20 MHz, 50 Ohms
Output current for AC 110…120/220…240V mains voltages (includes AC 208V mains):
nom 5 A at 24V, below 55 °C (122 °F) ambient temperature
4.3 A at 28V, below 55 °C (122 °F) ambient temperature
3.1 A at 24V, at 70 °C (158 °F) ambient temperature
2.7 A at 28V, at 70 °C (158 °F) ambient temperature
Derate linearly between +55 °C (122 °F) and +70 °C (158 °F)
for AC 100/200V mains voltages:
nom 5 A at 24V, below 55 °C (122 °F) ambient temperature
4.3 A at 28V, below 55 °C (122 °F) ambient temperature
2.5 A at 24V, at 70 °C (158 °F) ambient temperature
2.1 A at 28V, at 70 °C (158 °F) ambient temperature
Derate linearly 50 …70 °C (122…158 °F)
Overload behavior continuous current output voltage > 10V DC, see Figure 8
Intermittent output voltage < 10V DC, see Figure 8
Short Circuit current typ 3.5 A(2) average (R.M.S.) current, load impedance 50mOhm
Output capacitance typ 2 050 μF included inside the power supply
(1) This is the maximum output voltage that can occur at the clockwise end position of the potentiometer due to tolerances. It is not
guaranteed value that can be achieved. The typical value is about 28.5V.
(2) Discharge current of output capacitors is not included.
Figure 8 - Output Voltage vs. Output Current, R ms current, typ Figure 9 - Intermittent Operation at Shorted Output, typ
Output Voltage
0
024
4
8
12
28V
16
20
24
10A53167
intermittent
operation
8 9
continuous
current
Adjustment
Range
Output Current
A...132/264Vac
B...85/187Vac
A
B
60ms
360ms
9.2A

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 11
Basic Power Supply 5 A
Hold-up Time
DC OK Relay Contact This feature monitors the output voltage that is produced by the power supply
itself. It is independent of a back-fed voltage from a unit that is connected in
parallel to the power supply output (for example, redundant application).
Figure 12 - DC-OK Relay Contact Behavior
Type AC 100V AC 120V AC 230V
24V, 2.5 A typ 64 ms 108 ms 105 ms
min 54 ms 91 ms 88 ms
24V, 5 A typ 26 ms 51 ms 50 ms
min 22 ms 43 ms 42 ms
Figure 10 - Hold-up Time vs. Input Voltage Figure 11 - Shut-down behavior, definitions
0
25
50
125ms
85 120 155 190 230Vac
Input Voltage
Hold-up Time
75
100
a) 24V 2.5A typ.
b) 24V 2.5A min.
c) 24V 5A typ.
d) 24V 5A min.
a b c d a
b
c
d
- 5%
Hold-up Time
Zero Transition
Output
Voltage
Input
Voltage
Attribute 1606-XLB120E
Contact closes As soon as the output voltage reaches 21.4V
Contact opens As soon as the output voltage dips below 21.4V
Contact ratings max 60V DC 0.3 A, 30V DC 1 A, 30V AC 0.5 A resistive load
min 1 mA at 5V DC minimum required load
Isolation voltage See Dielectric Strength on page 21
21.4V
open
Output Voltage
closed

12 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Efficiency and Power Loss
Attribute AC 100V AC 120V AC 230V Notes
Efficiency typ 90.7% 91.2% 92.3% at 24V, 5 A
Average
efficiency(1) typ 89.2% 89.4% 90.6% 25% at 1.25 A, 25% at 2.5 A,
25% at 3.75 A. 25% at 5 A
Power losses typ 1.4 W 1.5 W 0.7 W at 24V, 0 A
typ 7.0 W 7.4 W 6.0 W at 24V, 2.5 A
typ 12.3 W 11.6 W 10.0 W at 24V, 5 A
(1) The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load
for 25% of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time
and with 100% of the nominal load for the rest of the time.
Figure 13 - Efficiency vs. Output Current, typ Figure 15 - Power Losses vs. Output Current at 24V, typ
Figure 14 - Efficiency vs. Input Voltage at 24V, 5 A, typ Figure 16 - Power Losses vs. Input Voltage at 24V, 5 A
Efciency
0.5
86
87
88
89
90
91
92
85
93%
5A2 2.5 413
a
c
b
Output Current
1.5 3.5 4.5
a) 100Vac
b) 120Vac
c) 230Vac
Power Losses
051A
0
2
6
8
10
12W
4
234
Output Current
a) 100Vac
b) 120Vac
c) 230Vac
c
b
a
Efciency
90 120 155 180 230 260Vac
87
88
89
90
Input Voltage
91
92
93%
Power Losses
6
8
10
12
14W
90 120 155 180 230 260Vac
Input Voltage

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 13
Basic Power Supply 5 A
Lifetime Expectancy and
Mean Time between Failure
(MTBF)
Functional Diagram Figure 17 - Functional Diagram
Attribute AC 100V AC 120V AC 230V Notes
Lifetime
expectancy(1) 181 000 h 194 000 h 219 000 h at 24V, 2.5 A and 40 °C (104 °F)
511 000 h 548 000 h 621 000 h at 24V, 2.5 A and 25 °C (77 °F)
66 000 h 68 000 h 83 000 h at 24V, 5 A and 40 °C (104 °F)
188 000 h 193 000 h 234 000 h at 24V, 5 A and 25 °C (77 °F)
MTBF
(2) SN29500,
IEC 61709
1 065 000 h 1 147 000 h 1 379 000 h at 24V, 5 A and 40 °C (104 °F)
2 038 000 h 2 166 000 h 2 519 000 h at 24V, 5 A and 25 °C (77 °F)
MIL HDBK
217 F
681 000 h 651 000 h 645 000 h at 24V, 5 A and 40 °C (104 °F); Ground Benign GB40
872 000 h 842 000 h 839 000 h at 24V, 5 A and 25 °C (77 °F); Ground Benign GB25
165 000 h 164 000 h 168 000 h at 24V, 5 A and 40 °C(104 °F); Ground Fixed GF40
206 000 h 205 000 h 211 000 h at 24V, 5 A and 25 °C (77 °F); Ground Fixed GF25
(1) The Lifetime expectancy that is shown in the table indicates the minimum operating hours (service life) and is determined by the
lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours and is calculated
according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum
life of up to 15 years (131 400 h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare
devices.
(2) MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates reliability of a
device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of for example, 1 000 000 h means
that statistically one unit fails every 100 hours if 10 000 units are installed in the field. However, it cannot be determined if the failed
unit has been running for 50 000 h or only for 100 h.
+
+
-
-
V
OUT
Input Fuse
&
Input Filter
Output
Voltage
Regulator
Power
Converter Output
Filter
DC
ok
L
N
Output
Over-
Voltage
Protection
Input
Rectier
&
Inrush
Limiter
(NTC)
DC-ok
Relay DC-ok
Contact
115/230V
Auto
Select

14 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
EMC
EMC Immunity According to Generic Standards EN 61000-6-1 and EN 61000-6-2 Criterion(1)
Electrostatic discharge EN 61000-4-2 contact discharge
air discharge
8 kV
8 kV
Criterion A
Criterion A
Electromagnetic RF field EN 61000-4-3 80 MHz-2.7 GHz 20V/m Criterion A
Fast transients (Burst) EN 61000-4-4 input lines
output lines
DC-OK signal
(coupling clamp)
4 kV
2 kV
2 kV
Criterion A
Criterion A
Criterion A
Surge voltage on input EN 61000-4-5 L ->N
L ->PE, N ->PE
2 kV
4 kV
Criterion A
Criterion A
Surge voltage on output EN 61000-4-5 + ->-
+/- ->PE
500V
1 kV
Criterion A
Criterion A
Surge voltage on DC-OK EN 61000-4-5 DC-OK signal… PE 1 kV Criterion A
Conducted disturbance EN 61000-4-6 0.15…80 M Hz 20V Criterion A
Mains voltage dips EN 61000-4-11 0% of 100V AC
40% of 100V AC
70% of 100V AC
0% of 200V AC
40% of 200V AC
70% of 200V AC
0V AC, 20 ms
40V AC, 200 ms
70V AC, 500 ms
0V AC, 20 ms
80V AC, 200 ms
140V AC, 500 ms
Criterion A
Criterion C
Criterion A(2)
Criterion A
Criterion C
Criterion A
Voltage interruptions EN 61000-4-11 0% of 220V AC (=0V) 5000 ms Criterion C
Voltage sags SEMI F47 0706 dips on the input voltage according to SEMI F47 standard
80% of 208V AC (166V AC)
70% of 208V AC (146V AC)
50% of 208V AC (104V AC)
80% of 120V AC (96V AC)
70% of 120V AC (84V AC)
50% of 120V AC (60V AC)
1000 ms
500 ms
200 ms
1000 ms
500 ms
200 ms
Criterion A
Criterion A
Criterion C
Criterion A
Criterion A
Criterion C
Powerful transients VDE 0160 over entire load range 750V, 1.3 ms Criterion A
(1) Criterion A: Power supply shows normal operation behavior withing the defined limits.
Criterion C: Temporary loss of function is possible. Power supply can shut down and restart by itself. No damage or hazard for the
power supply occurs.
(2) Below 4.5 A, Criterion C for currents above 5 A.
EMC Emission According to Generic Standards: EN 61000-6-3, EN 610000-6-4
Conducted emission input lines EN 55011, EN 55022
FCC Part 15
CISPR 11, CISPR 22
Class B
Conducted emission output
lines(1) IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 limits for DC power port according to EN 61000-6-3 not fulfilled
Radiated emission EN 55011, EN 55022 Class B
Harmonic input current EN 61000-3-2 Fulfilled for class A equipment
Voltage fluctuations, flicker EN 61000-3-3 Fulfilled(2)
This device complies with FCC Part 15 rules. Operation is subjected to following two conditions: (1) this device cannot
cause harmful interference, and (2) this device must accept any interference received, including interference that can
cause undesired operation.
(1) For information only, not mandatory for EN 61000-6-3.
(2) Tested with constant current loads, non-pulsing.

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 15
Basic Power Supply 5 A
Application Notes Peak Current Capability
The unit can deliver peak currents (up to several milliseconds) which are
higher than the specified short-term currents.
This helps to start current demanding loads. 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. The same situation
applies when starting a capacitive load.
The peak current capability also verifies the safe operation of subsequent
circuit breakers of load circuits. The load branches are often individually
protected with circuit breakers or fuses. If there is a short or an overload in one
branch circuit, the fuse or circuit breaker need a certain amount of overcurrent
to open in a timely manner. This avoids voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the
built-in large sized output capacitors of the power supply. The capacitors get
discharged during such an event, which causes a voltage dip on the output. The
following two examples show typical voltage dips:
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).
Figure 18 - Peak Load with 2x the Nominal Current for 50 ms, typ Figure 19 - Peak Load with 5x the Nominal Current for 5 ms, typ
10ms/DIV
Output
Voltage
Output
Current
24V
0A
10A
17V
10 A Peak load (resistive) for 50 ms
Output voltage dips from 24V to 17V.
1ms/DIV
Output
Voltage
Output
Current
24V
0A
25A
9V
25 A Peak load (resistive) for 5 ms
Output voltage dips from 24V to 9V.
Peak Current Capability Voltage Dip Peak Load
Peak current voltage dips typ 24…17V at 10 A for 50 ms, resistive load
typ 24…13V at 25 A for 2 ms, resistive load
typ 24…9V at 25 A for 5 ms, resistive load

16 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
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 35V DC. The absorbing energy
can be calculated according to the built-in large sized output capacitor that is
specified in Output on page 10.
External Input Protection
The unit is tested and approved for branch circuits up to 30 A (UL) and 32 A
(IEC). 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 10 A, B-characteristic or 6 A, C-characteristic breaker should be used.
Parallel Use to Increase Output Power
Do not use the power supply in parallel to increase the output power.
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.
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 defect unit becomes a load for the other power supplies and the output
voltage cannot be maintained any more. This can only be avoided by utilizing
decoupling diodes that are included in the redundancy module.
Recommendations for building redundant power systems:
– Use the DC-OK signal contact to monitor the individual power
supply units.
– Use separate input fuses for each power supply.
– Use separate mains systems for each power supply whenever it is
possible.
– It is desirable to set the output voltages of all units to the same value
(± 100 mV) or leave it at the factory setting.

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 17
Basic Power Supply 5 A
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 150V DC. Voltages with a
potential above 60V DC 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
60V DC.
Avoid return voltage (for example, from a decelerating motor or battery) which
is applied to the output terminals.
Keep an installation clearance (left/right) of 15 mm (0.59 in.)between two
power supplies and avoid installing the power supplies on top of each other.
Pay attention that leakage current, EMI, inrush current, harmonics increase
when using multiple power supplies.
Figure 20 - Series Operation
Inductive and Capacitive Loads
• No limitations for inductive loads.
• No limitations for capacitive loads in combination with an additional
resistive type of load.
• Limitations apply for capacitive loads in combination with constant
current type of loads:
– 20 mF Max with an additional 2.5 A constant current load and
– 10 mF max with an additional 5 A constant current load.
Charging of Batteries
Do not use the power supply to charge batteries.
Unit A
AC
DC
Unit B
AC
DC
-
+
-
+
Load
+
-
Earth
(see notes)

18 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Operation on Two Phases
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+10%.
Figure 21 - Operation on Two Phases
Use in a Tightly Sealed Enclosure
When the power supply is installed in a tightly sealed enclosure, the
temperature inside the enclosure is 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 IP 66 Box PK 9516 100
–Plastic
– 110 x 180 x 165 mm (4.33 x 7.09 x 6.50 in)
•Input
– 230V AC
Attribute Case A Case B
Load(1)
(1) Load is placed outside the box.
24V, 5 A 24V, 4 A (=80 %)
Temperature inside the box(2)
(2) In the middle of the right side of the power supply with a distance of 1 cm (0.39 in.).
41.5 °C (106.7 °F) 38.9 °C (102 °F)
Temperature outside the box 24.4 °C (75.9 °F) 24.2 °C (75.6 °F)
Temperature rise 17.1K 14.5K
240V +10% max.
Fuse
L2
L1
L3
L
N
PE
Power Supply
AC
DC
internal
fuse

Rockwell Automation Publication 1606-RM055B-EN-P - February 2017 19
Basic Power Supply 5 A
Specifications
Attribute 1606-XLB120E Notes
Output voltage DC 24V
24…28V DC Adjustment range
Output for AC 110…120/
220…240V mains:
5.0...4.3 A
3.1...2.7 A
at 24…28V, <55 °C (122 °F)
at 24…28V, <70 °C (158 °F)
for AC 100/200V mains: 5.0...4.3 A
2.5...2.1 A
at 24…28V, <50 °C (122 °F)
at 24…28V, <70 °C (158 °F)
Output ripple < 100 mVpp 20 Hz to 20 MHz
AC Input voltage AC 100…120V/
200…240V
±10% Auto-Select
Mains frequency 50…60 Hz ±6 %
AC Input current 1.72 A/1.05 A at 120/ 230V AC
Power factor 0.64/0.54 at 120/ 230V AC
AC Inrush current 22 A/33 A peak at 120/ 230V AC, 40 °C (140 °F)
Efficiency 91.2 /92.3% at 120/ 230V AC
Losses 11.6 W/10.0 W at 120/ 230V AC
Temp. range -10… +70 °C
(14… 158 °F)
operational
Derating 3 W/°C 55…70 °C (131… 158 °F)(1)
(1) 50…70 °C (122…158 °F) for AC 100 V/ 200V mains
Hold-up time 51 ms/50 ms at 120/ 230V AC
Dimensions 39 x 124 x124 mm
(1.53 x 4.88 x 4.88)
W x H x D
Weight 370 g/0.81 lb

20 Rockwell Automation Publication 1606-RM055B-EN-P - February 2017
Basic Power Supply 5 A
Environment
Attribute 1606-XLB120E Notes
Operational temperature(1) -10… +70 °C (14… 158 °F) reduce output power according to Figure 22
Storage temperature -40… +85 °C (-40… 185 °F) for storage and transportation
Output derating(2) 3W/°C (55…70 °C 131…158 °F)
3W/°C (50…70 °C; 122…158 °F)
for AC 110-120/220-240V mains systems
for AC 100/200V mains systems
Humidity(3) 5...95% r.h. IEC 60068-2-30
Vibration sinusoidal(4) 2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g
2 hours/axis
IEC 60068-2-6
Shock(5) 30g 6ms, 20g 11ms
3 bumps/direction, 18 bumps in total
IEC 60068-2-27
Altitude 0…2000 m (0…6 560 ft.) without any restrictions
2000…6000 m (6 560… 20 000 ft.) reduce output power or ambient temperature,
see Figure 22 IEC 62103, EN 50178,
overvoltage category II
Altitude derating 7.5W/1000m or 5 °C/1000m > 2000 m (6500 ft.), see Figure 23
Overvoltage category III IEC 62103, EN 50178, altitudes up to 2000m
II altitudes from 2000m to 6000m
Degree of pollution 2 IEC 62103, EN 50178, not conductive
LABS compatibility The unit does not release any silicone or other LABS-critical substances and is suitable for
use in paint shops.
(1) Operational temperature is the same as the ambient or surrounding temperature and is defined as the air temperature 2cm below
the unit.
(2) For AC 208V mains use AC 200…220V values.
(3) Do not energize while condensation is present.
(4) Tested on a DIN Rail with a thickness of 1.3 mm.
(5) Tested on a DIN Rail with a thickness of 1.3 mm.
Figure 22 - Output Current vs. Ambient Temperature Figure 23 - Output Current vs. Altitude
0
-10 0 +20 +40 +70°C
1.0A
2.0A
4.0A
5.0A
+55
Allowable Output Current at 24V
3.1A
2.5A
Ambient Temperature
+50
a) AC 110-120/ 220-240V mains
b) AC 100/ 200V mains
a
b
Allowed Output
Current at 24V
0
0 2000 4000 6000m
1
2
3
4
5
6A
Altitude
A...Tamb<55°C
B...Tamb<45°C
C...Tamb<35°C
A
B
C