Rockwell Automation Allen-Bradley 1606-XLB90EQ User manual

Power Supply - 24V, 3.8 A, 90 W,
Single-phase Input
Catalog Number 1606-XLB90EQ
Reference Manual Original Instructions

2Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
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 circumstances 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 circumstances 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-RM123A-EN-P - September 2021 3
Table of Contents
Terminology and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Catalog Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
AC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input Inrush Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hold-up Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Efficiency and Power Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Front Side and User Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connection Terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lifetime Expectancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Mean Time Between Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Safety and Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dielectric Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Certifications and Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . 17
Approximate Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Operation on Two Phases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Use In a Tightly Sealed Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Prohibited Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Additional Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
Table of Contents
Notes:

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 5
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Terminology and
Abbreviations
All values in this document are typical values under the following conditions
unless otherwise noted: 230V AC 50 Hz input voltage, 24V 3.8 A output load, 
25 °C (77 °F) ambient temperature, and after a 5 minutes run-in time.
Product Overview The 1606-XLB90EQ is part of a series of compact industrial grade DIN rail
power supplies that focus on the essential features needed in present day
industrial applications. The excellent cost/performance ratio does not
compromise quality or reliability.
The output fulfils the requirements for a limited power source according to
NEC CLASS 2.
The mechanically robust housing is made of a high-grade, reinforced molded
material, which permits the units to be used in surrounding temperatures up
to 70 °C (158 °F).
The 1606-XLB90EQ is equipped with large screw terminals for easy wiring.
Product features:
•100…240Vwide-rangeinput
• NEC Class 2 compliant
• Cost-optimized without compromising quality or reliability
• Width only 36 mm (1.42 in.)
• Efficiency up to 93.8%
• Low no-load power losses
• Full power between -10…+60 °C (14…140 °F)
• Large screw terminals
Terms Descriptions
PE The abbreviation for Protective Earth. PE has the same meaning as the symbol.
The symbol for Protective Earth.
Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”.
AC 230V A value that is displayed with the AC or DC before the value represents a nominal voltage with standard tolerances (usually ±15%) included. For example, DC 12V
describes a 12V battery disregarding whether it is full (13.7V) or flat (10V).
230V AC A value with the unit (V AC) at the end is a momentary value without any additional
tolerances included.
50 Hz versus 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.
nom Indicates a nominal value.
typ Indicates a typical value.
— (alone in table cell) A dash alone in a table cell indicates that there is no information to be included in that
cell.

6Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Specifications
Catalog Number
Attributes Values Notes
Output voltage nom DC 24V —
Adjustment range 24…28V Factory setting 24.1V
Output current
3.8…3.2 A Below 60 °C (140 °F) ambient
2.8…2.4 A At 70 °C (158 °F) ambient
Derate linearly between 60…70 °C (140…158 °F)
Input voltage AC AC 100…240V ±10%
Mains frequency 50…60 Hz ±6%
Input current AC 1.45 A / 0.95 A At 120 / 230V AC
Power factor 0.58 / 0.45 At 120 / 230V AC
Input inrush current 18 A peak / 40 A peak At 120 / 230V AC,
40 °C (104 °F), cold start
Efficiency
92.1% / 93.8% At 120 / 230V AC
Losses 7.9 W / 6.0 W At 120 / 230V AC
Hold-up time 25 ms / 119 ms At 120 / 230V AC
Temperature range -10…+70 °C
(14…158 °F) —
Size (W x H x D) 36 x 90 x 91 mm
(1.42 x 3.54 x 3.58 in.) Without DIN rail
Weight 270 g (0.6 lb) —
Catalog Number Description
1606-XLB90EQ Power supply

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 7
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
AC Input The device is suitable to be supplied from TN-, TT-, and IT mains networks
with AC voltage.
Attributes Values Notes
AC input Nom AC 100…240V —
AC input range Min 90…264V AC Continuous operation
Min 264…300V AC For 500 ms max
Allowed voltage L or N to earth Max 300V AC Continuous according to IEC 62477-1
Input frequency Nom 50…60 Hz ±6%
Turn-on voltage Typ 80V AC Steady-state value, see Figure 1
Shut-down voltage Typ 62V AC Steady-state value, see Figure 1
External input protection
The device is designed, tested, and approved for branch circuits up to 20 A (UL) without an
additional protection device. If an external fuse is used, do not use circuit breakers
smaller than 6A B- or 4A C-Characteristic. Smaller circuit breakers may cause a nuisance
tripping of the circuit breaker.
Attributes Values Notes
AC 100V AC 120V AC 230V
Input current Typ 1.69 A 1.45 A 0.95 A At 24V, 3.8 A, see Figure 3
Power factor Typ 0.6 0.58 0.45 At 24V, 3.8 A, see Figure 4
Start-up delay Typ 50 ms 50 ms 50 ms See Figure 2
Rise time
Typ 21 ms 21 ms 20 ms At 24V, 3.8 A constant current load, 0 mF load capacitance,
see Figure 2
Typ 42 ms 42 ms 40 ms At 24V, 3.8 A constant current load, 2 mF load capacitance,
see Figure 2
Turn-on overshoot Max 100 mV 100 mV 100 mV See Figure 2
Figure 1 - Input Voltage Range Figure 2 - Turn-on Behavior, Definitions
Turn-on
90V
Rated
input range 500 ms max
VIN
POUT
300V AC
264V
Shut-down
Start-up
delay Rise
Time
Overshoot
- 5%
Output
Voltage
Input
Voltage
Figure 3 - Input Current Versus Output Load at 24V Output Voltage Figure 4 - Power Factor Versus Output Load at 24V Output Voltage
4 A
012
0
0.3
0.6
1.8 A
Input Current, Typ
3
0.9
1.2
b
c
a
a: 100V AC
b: 120V AC
c: 230V AC
1.5
Output Current
4.0 A
0.4 1.0 2.0 3.0
0.1
0.2
Output Current
0.3
0.4
0.5
0.6
Power Factor, Typ
a) 100V AC, 50 Hz
b) 120V AC, 60 Hz
c) 230V AC, 50 Hz
b
c
a

8Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Input Inrush Current A negative temperature coefficient (NTC) limits the input inrush current after
turn-on of the input voltage. The inrush current is dependent on input voltage
and ambient temperature. The output load has no impact on the inrush
current value.
The charging current into EMI suppression capacitors is disregarded in the
first microseconds after switch-on.
Attributes Values Notes
AC 100V AC 120V AC 230V
Inrush current
Typ 14 Apeak 18 Apeak 40 Apeak At 40 °C (104 °F) ambient, cold start
Typ 12 Apeak 16 Apeak 35 Apeak At 25 °C (77 °F) ambient, cold start
Max 17 Apeak 22 Apeak 48 Apeak At 40 °C (104 °F) ambient, cold start
Max 15 Apeak 20 Apeak 43 Apeak At 25 °C (77 °F) ambient, cold start
Inrush energy Max 0.3 A2s0.4A
2s1.7A 2sAt 40 °C (104 °F) ambient, cold start
Figure 5 - Typical Turn-on Behavior at 230V AC and 25 °C (77 °F) Ambient Figure 6 - First Inrush Peak at 230V AC and 25 °C (77 °F) Ambient
20 ms/DIV
Input current 20 A/DIV
Input voltage 1000V/DIV
Output voltage
1 ms/DIV
Input current
5 A/DIV
Ipk = 35 A
Figure 7 - Typical Turn-on Behavior at 120V AC and 25 °C (77 °F) Ambient Figure 8 - First Inrush Peak at 120V AC and 25 °C (77 °F) Ambient
20 ms/DIV
Input current 10 A/DIV
Input voltage 500V/DIV
Output voltage
1 ms/DIV
Input current
5 A/DIV
Ipk = 16 A

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 9
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Output The output provides a SELV/PELV/ES1 rated voltage, which is galvanically
isolated from the input voltage.
The output is electronically protected against no-load, overload and short
circuit. In case of a protection event, audible noise may occur.
The output is designed to supply any kind of loads, including unlimited
inductive loads. Capacitive loads should not be larger than 3300 μF with 3.8 A
or 4200 μF with 1.9 A additional resistive load.
At heavy overloads (when output voltage falls below 14V), the power supply
delivers continuous output current for 20 ms. After this, the output is switched
off for approx. 160ms before a new start attempt is automatically performed.
This cycle is repeated as long as the overload exists. If the overload has been
cleared, the device will operate normally.
Attributes Values Notes
Output voltage Nom DC 24V —
Adjustment range
Min 24…28V Guaranteed value
Max 29.0V This is the max output voltage that can occur at the clockwise end position of the
potentiometer due to tolerances. It is not guaranteed that this value can be achieved.
Factory settings Typ 24.1V ±0.2%, at full load and cold unit
Line regulation Max 10 mV Between 90…300V AC
Load regulation Max 100 mV Between 0…3.8 A, static value, see Figure 9
Ripple and noise voltage Max 100 mVpp Bandwidth 20 Hz…20 MHz, 50 Ω
Output current
Nom 3.8 A At 24V and an ambient temperature below 60 °C (140 °F)
Nom 3.2 A At 24V and 70 °C (158 °F) ambient temperature
Nom 2.8 A At 28V and an ambient temperature below 60 °C (140 °F)
Nom 2.4 A At 28V and 70 °C (158 °F) ambient temperature
Overload protection — Included Electronically protected against no-load, overload, and short circuit. If there is a protection
event, audible noise may occur.
Overload behavior — Continuous current Output voltage > 14V DC, see Figure 9
— Intermittent current Output voltage < 14V DC, see Figure 9
Overload/ short-circuit current
Max 6.7 A Continuous current, see Figure 9
Typ 8.6 A Intermitted current peak value for 20 ms typ. Load impedance 150 mΩ, see Figure 10.
Discharge current of output capacitors is not included.
Max 3.2 A Intermitted current average value (R.M.S.) Load impedance 150 mΩ, see Figure 10.
Output capacitance Typ 1600 µF Included inside the power supply
Back-feeding loads Max 35V The unit 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 absorbing
energy can be calculated according to the built-in large sized output capacitor.
Figure 9 - Output Voltage Versus Output Current, Typ Figure 10 - Intermittent Current at Short Circuit, Typ
Output Voltage
0
01 2
4
8
12
28V
16
20
24
8 A4 567
3
Output Current
A
B
A: continuous current
B: intermittent current
Adjustment Range
Output
Current
0
8.6 A
160 ms 160 ms
160 ms
20
ms
t
Short -circuit Normal
operation
Normal
operation
20
ms
20
ms

10 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Hold-up Time The hold-up time is the time during which the output voltage of a power supply
remains within specification following the loss of input power. The hold-up
time is dependent on output load. At no load, the hold-up time can be up to
several seconds. The green DC OK status indicator is also on during this time.
Attributes Values Notes
AC 100V AC 120V AC 230V
Hold-up Time
Typ 14 ms 25 ms 119 ms At 24V, 3.8 A. See Figure 11.
Typ 40 ms 60 ms 242 ms At 24V, 1.9 A. See Figure 11.
Min 11.5 ms 20 ms 95 ms At 24V, 3.8 A. See Figure 11.
Min 32 ms 48 ms 194 ms At 24V, 1.9 A. See Figure 11.
Figure 11 - Hold-up Time Versus Input Voltage Figure 12 - Shut-down Behavior, Definitions
0
20
40
100
120 ms
90 120 155 190 230V AC
Input Voltage
Hold-up Time
60
80
a) 24V 1.9 A typ
b) 24V 1.9 A min
c) 24V 3.8 A typ
d) 24V 3.8 A min
a b c
d
- 5%
Hold-up Time
Zero Transition
Output
Voltage
Input
Voltage

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 11
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Efficiency and Power
Losses
The average efficiency is an assumption for a typical application where the
power supply is loaded with the following:
• 25% of the nominal load for 25% of the time
• 50% of the nominal load for 25% of the time
• 75% of the nominal load for 25% of the time
• 100% of the nominal load for 25% of the time
Attributes Values Notes
AC 100V AC 120V AC 230V
Efficiency Typ 90.6% 92.1% 93.8% At 24V, 3.8 A (full load)
Average efficiency Typ 90.5% 91.6% 92.0% 25% at 0.95 A, 25% at 1.9 A,
25% at 2.85 A, 25% at 3.8 A
Power losses
Typ 0.3 W 0.3 W 0.4 W At no load
Typ 5.0 W 4.3 W 3.8 W At 24V, 1.9 A (half load)
Typ 9.5 W 7.9 W 6.0 W At 24V, 3.8 A (full load)
Figure 13 - Efficiency Versus Output Current at 24V, Typ Figure 14 - Losses Versus Output Current at 24V, Typ
Eciency
0.2
87
88
89
90
91
92
93
86
94%
3.8 A1.4 2.0 3.2
Output Current
0.8 2.6
a) 230V AC
b) 120V AC
c) 100V AC
c
b
a
Power Losses
0 0.5 4.0 A
0
1
4
5
8
10 W
9
1.0 1.5 2.0
Output Current
2.5 3.0
a) 100V AC
b) 120V AC
c) 230V AC
3.5
7
6
2
3
c
b
a
Figure 15 - Efficiency Versus Input Voltage at 24V, 3.8 A, Typ Figure 16 - Losses Versus Input Voltage at 24V, 3.8 A, Typ
Eciency
85 120 155 190 225 260V AC
88
89
90
91
Input Voltage
92
93
94%
Power Losses
2
4
6
8
10 W
85 120 155 190 225 260V AC
Input Voltage

12 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Functional Diagram Figure 17 - Functional Diagram
Front Side and User
Elements
Input
Fuse
&
Input
Filter
L
N
Output Over-
Voltage
Protection
Input
Rectifier
&
Inrush
Limiter
Output
Voltage
Regulator
+
+
-
-
Output
Current
Limiter
V
OUT
DC-ok
LED
Power
Converter
Output
Filter
Figure 18 - Front Side User Elements
1 Output terminals (screw terminals)
Dual terminals for the negative and positive pole. Both poles are
internally connected. 
+ Positive output 
- Negative (return) output
2 DC OK status indicator (green)
The status indicator is on when the output voltage is > 18V.
3 Output voltage adjustment potentiometer
4 Input terminals (screw terminals)
L: Phase (line) input
N: Neutral conductor input
Protective Earth (PE) input
1
2
3
4

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 13
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Connection Terminals The terminals are IP20 fingersafe constructed and are suitable for field wiring
and factory wiring. Ensure that all strands of a stranded wire enter the
terminal connection. The use of ferrules is recommended.
Lifetime Expectancy The lifetime expectancies that are shown in the table indicate the minimum
operating hours (service life). The lifetime expectancy of the built-in
electrolytic capacitors determines the lifetime expectancy of the power supply.
Lifetime expectancy is specified in operational hours and is calculated
according to the manufacturer specification of the capacitor.
The manufacturer of the electrolytic capacitors only states a maximum life of
up to 15 years (131,400 hr). Any number that exceeds this value is a calculated
theoretical lifetime, which can be used to compare devices.
Mean Time Between Failure Mean Time Between Failure (MTBF) is calculated according to statistical
device failures, and indicates reliability of a device. The MTBF value is a
statistical representation of the likelihood of a unit to fail and does not
necessarily represent the life of a product. An MTBF value of, for example,
1,000,000 hr 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 hr or only for 100 hr.
For these types of units, the Mean Time To Failure (MTTF) value is the same as
the MTBF value.
Attributes Descriptions
Type Screw terminals
Solid wire 6 mm2max
Stranded wire 4 mm2max
American Wire Gauge AWG 20…10
Wire diameter max (including ferrules) 2.8 mm (0.11 in.)
Wire stripping length 7 mm (0.28 in.)
Recommended tightening torque 1 N•m (9 lb•in)
Screwdriver 3 mm (0.12 in.) slotted or Phillips No 1
Attributes Values Notes
AC 100V AC 120V AC 230V
Lifetime expectancy
39,000 hr 64,000 hr 102,000 hr At 24V, 3.8 A and 40 °C (104 °F)
260,000 hr 292,000 hr 309,000 hr At 24V, 1.9 A and 40 °C (104 °F)
91,000 hr 147,000 hr 287,000 hr At 24V, 3.8 A and 25 °C (77 °F)
640,000 hr 720,000 hr 815,000 hr At 24V, 1.9 A and 25 °C (77 °F)
Attributes Values Notes
AC 100V AC 120V AC 230V
MTBF SN 29500, IEC 61709 1,127,000 hr 1,222,000 hr 1,446,000 hr At 24V, 3.8 A and 40 °C (104 °F)
2,161,000 hr 2,310,000 hr 2,642,000 hr At 24V, 3.8 A and 25 °C (77 °F)
MTBF MIL HDBK 217F
721,000 hr 730,000 hr 670,000 hr At 24V, 3.8 A, 40 °C (104 °F); Ground Benign GB40
1,042,000 hr 1,055,000 hr 977,000 hr At 24V, 3.8 A, 25 °C (77 °F); Ground Benign GB25
210,000 hr 215,000 hr 211,000 hr At 24V, 3.8 A, 40 °C (104 °F); Ground Fixed GF40
276,000 hr 282,000 hr 281,000 hr At 24V, 3.8 A, 25 °C (77 °F); Ground Fixed GF25

14 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Electromagnetic
Compatibility
The EMC behavior of the device is designed for applications in industrial
environment as well as in residential, commercial and light industry
environments.
The device complies with EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN
61000-6-4, EN 61000-3-2 and EN 61000-3-3.
The device complies with FCC Part 15 rules. Operation is subjected to following
two conditions: (1) this device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may
cause undesired operation.
Do not use this device on AC 100V mains with more than 2.9A load when the
application is sensitive to short output voltage dips during mains
interruptions even with a length shorter than 20ms.
Without additional measures to reduce the conducted emissions on the output
(e.g. by using a filter), the device is not suited to supply a local DC power
network in residential, commercial and light-industrial environments. No
restrictions apply for local DC power networks in industrial environments..
EMC immunity information is provided in the following table.
Attributes Standards Values Criteria(1)
(1) Criterion A: The device shows normal operation behavior within the defined limits.
Criterion B: The device operates continuously during and after the test. During the test, minor temporary
impairments may occur. If they do occur, the device corrects them.
Criterion C: Temporary loss of function is possible. The device may shut down. If it shuts down, it then restarts by
itself. No damage or hazards for the device occur.
Electrostatic discharge EN 61000-4-2 Contact discharge 8 kV Criterion A
Air discharge 8 kV Criterion A
Electromagnetic RF field EN 61000-4-3 80 MHz…6 GHz 10V/m Criterion A
Fast transients (Burst) EN 61000-4-4 Input lines 4 kV Criterion A
Output lines 2 kV Criterion A
Surge voltage on input EN 61000-4-5 L N2kVCriterionA
N / L  PE 4 kV Criterion A
Surge voltage on output EN 61000-4-5 + -1kVCriterionA
+ / -  PE 1 kV CriterionA
Conducted disturbance EN 61000-4-6 0.15…80 MHz 10V Criterion A
Mains voltage dips EN 61000-4-11
0% of 100V AC 0V AC, 20 ms Criterion B
40% of 100V AC 40V AC, 200 ms Criterion C
70% of 100V AC 70V AC, 500 ms Criterion A
0% of 120V AC 0V AC, 20 ms Criterion A
40% of 120V AC 48V AC, 200 ms Criterion C
70% of 120VAC 84V AC, 500 ms Criterion A
0% of 200V AC 0V AC, 20 ms Criterion A
40% of 200V AC 80V AC, 200 ms Criterion A
70% of 200V AC 140V AC, 500 ms Criterion A
Voltage interruptions EN 61000-4-11 — 0V AC, 5000 ms Criterion C
Powerful transients VDE 0160 Over entire load range 750V, 1.3 ms Criterion A

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 15
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
EMC emission information is provided in the following table.
Switching frequency information is provided in the following table.
Environment
Attributes Standards Notes
Conducted emission input lines EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32 Class B
Conducted emission output lines IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Limits for local DC power networks fulfilled.
Radiated emission EN 55011, EN 55032, CISPR 11, CISPR 32 Class B
Harmonic input current EN 61000-3-2 Fulfilled (Class A)
Voltage fluctuations, flicker EN 61000-3-3 Fulfilled, tested with non-pulsing constant current loads.
This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Attribute Values Notes
Main converter 5…120 kHz Dependent on input voltage and output load
Attributes Values Notes
Operational temperature -10…+70 °C (14…158 °F) The operational temperature is the ambient or surrounding temperature
and is defined as the air temperature 2 cm (0.79 in.) below the device.
Storage temperature -40…+85 °C (-40…+185 °F) For storage and transportation
Output derating
0.1 A/1 °C (0.1 A/1.8 °F) Between 60…70 °C (140…158 °F)
0.25 A/1000 m (0.25 A/3281 ft) or
5 °C/1000 m (9 °F/3281 ft) For altitudes > 2000 m (6562 ft), see Figure 20
Hardware does not control the derating. You must take this into consideration to stay below the derated
current limits to help prevent overloading the unit.
Humidity 5…95% r.H. According to IEC 60068-2-30. No condensation allowed.
Atmospheric pressure 110…54 kPa See Figure 20 for details
Altitude Up to 5000 m (16,404 ft) See Figure 20 for details
Overvoltage category II According to IEC 60664-1, for altitudes above 5000 m (16, 404 ft)
Impulse withstand voltage 4 kV (according to over-volrage
category III) Input to PE According to IEC 60664-1, for altitudes above 2000 m (6562 ft)
Degree of pollution 2 According to IEC 60664-1, non-conductive
Vibration sinusoidal(1) 2…17.8 Hz: ±1.6 mm (0.063 in.)
17.8…500 Hz: 2 g
2 hours / axis According to IEC 60068-2-6
Shock(1)
30 g 6 ms, 20 g 11 ms
3 bumps
/ direction
18 bumps intotal
According to IEC 60068-2-27
(1) Shock and vibration are tested in combination with DIN rails according to EN 60715, with a height of 15 mm (0.59 in.) and a thickness of 1.3
mm (0.05 in.). These tests are performed with the power supply in standard mounting orientation.
Figure 19 - Output Power Versus Ambient Temperature Figure 20 - Output Power Versus Altitude
Allowed Output Current at 24V
0
-10 0 +70 °C
2.8 A
3.8 A
+60
B
A
Ambient Temperature
A...continuous
B... short term (300 s max)
2000 5000 m
2.8 A
3.55 A
3.8 A
Altitude
Allowed Output Current at 24V
B
C
A... T amb < 60 °C
B... T amb < 50 °C
C... T amb < 45 °C
A
AP
(1)
80 54 kPa 110
0
(1) Atmospheric pressure
4000
62

16 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Safety and Protection
Features
Dielectric Strength The output voltage is floating and has no ohmic connection to the ground.
Double or reinforced insulation insulates the output to the input.
It is recommended that either the + pole or the – pole shall be connected to the
protective earth system. This helps to avoid situations in which a load starts
unexpectedly or cannot be switched off when unnoticed earth faults occur.
The manufacturer conducts type and routine tests. Field tests may be
conducted in the field using the appropriate test equipment, which applies the
voltage with a slow ramp (2 s up and 2 s down). Connect all phase-terminals
together and all output poles before conducting the test. When testing, set the
cutoff current settings to the value in the following table.
Figure 21 - Dielectric Strength
Attributes Values Notes
Isolation resistance
Min 500 MΩAt delivered condition between input and output, measured with 500V DC
Min 500 MΩAt delivered condition between input and PE, measured with 500V DC
Min 500 MΩAt delivered condition between output and PE, measured with 500V DC
Output overvoltage protection
Typ 30.5V DC —
Max 32V DC —
—If there is ananomaly inside the power supply,a redundant circuit limitsthe maximum output voltage to
32V. The output shuts down. To attempt a restart, turn the input power off for at least 90 s.
Class of protection — I According to IEC 61140
Degree of ingress protection — IP20 According to EN/IEC 60529
Over-temperature protection — Not included —
Input transient protection — Metal Oxide Varistor
(MOV) For protection values, see Electromagnetic Compatibility on page 14.
Internal input fuse — Included Non-user-replaceable, slow-blow, high-braking capacity fuse
Touch current (leakage current)
Typ 30 µA / 60 µA At 100V AC, 50 Hz, TN-,TT-mains / IT-mains
Typ 40 µA / 90 µA At 120V AC, 60 Hz, TN-,TT-mains / IT-mains
Typ 70 µA / 140 µA At 230V AC, 50 Hz, TN-,TT-mains / IT-mains
Max 40 µA / 70 µA At 110V AC, 50 Hz, TN-,TT-mains / IT-mains
Max 50 µA / 110 µA At 132V AC, 60 Hz, TN-,TT-mains / IT-mains
Max 90 µA / 180 µA At 264V AC, 50 Hz, TN-,TT-mains / IT-mains
Test or Setting Time A B C
Type test 60 s 2500V AC 3000V AC 1000V AC
Routine test 5 s 2500V AC 2500V AC 500V AC
Field test 5 s 2000V AC 2000V AC 500V AC
Cutoff current setting for field test — > 2 mA > 2 mA > 6 mA
A
C
L
Input
Earth, PE
Output
+
-
NB

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 17
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Certifications and
Standards Compliance Name Symbol/Mark Notes
CE Declaration of
Conformity
The CE marking indicates conformance with the following
European regulations:
–RoHSdirective
– EMC Directive
– Low Voltage Directive (LVD)
ANSI/UL 61010-2-201
(former UL 508)
(planned)
Listed as Open Type Device for use in Control Equipment UL
Category NMTR, NMTR7
E-File: NMTR(7).E56639
NEC CLASS 2
UL Certificate
NEC CLASS 2 - Limited Power Source
Listed in the UL 61010-2-201 approval report, investigated
according to UL 1310
Corrosion
G3-ISA-71.04
Manufacturer's Declaration
Airborne Contaminants Corrosion Test
Severity Level: G3 Harsh
H2S: 100ppb
NOx: 1250ppb
Cl2: 20ppb
SO2: 300ppb
Test Duration: 3 weeks, this simulates a service life of 10 years.
REACH Directive Directive 1907/2006/EU of the European Parliament and the Council of June 1, 2007 regarding the Registration, Evaluation,
Authorization, and Restriction of Chemicals
WEEE Directive Manufacturer's Statement
EU-Directive on Waste Electrical and Electronic Equipment
RoHS (China RoHS 2)
Manufacturer's Statement
Administrative Measures for the Restriction of the Use of
Hazardous Substances in Electrical and Electronic Products
25 years
IEC 61558-2-16
(Annex B)
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
Ind. Cont. Eq.
Safety Isolating
Transformer

18 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Approximate Dimensions
and Weight Attributes Values and Descriptions
Width 36 mm ( 1.42 in.)
Height 90 mm ( 3.54 in.)
Depth 91 mm ( 3.58 in.) TheDIN railheightmust beadded totheunit depth tocalculate thetotal required
installation depth.
Weight 270 g (0.6 lb)
DIN rail Use 35 mm (1.38 in.) DIN rails according to EN 60715 or EN 50022 with a height of 7.5 mm
(0.295 in.) or 15 mm (0.59 in.).
Housing material High-grade polycarbonate/ ABS blend material
Installation clearances
Keep the following min installation clearances:
• 40 mm (1.57 in.) on the top
• 20 mm (0.79 in.) on the bottom
• 0 mm (0 in.) on the left side
• 0 mm (0 in.) on the right side
• If the adjacent device is a heat source, increase the side clearances from 0 mm
(0 in.) to 15 mm (0.59 in.).
Penetration protection Small parts like screws and nuts with a diameter larger than 4.2 mm (0.165 in.).
Figure 22 - Front View Figure 23 - Side View
All dimensions in mm

Rockwell Automation Publication 1606-RM123A-EN-P - September 2021 19
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
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%.
Ensure that the wire, which is connected to the N-terminal, is appropriately
fused.
Figure 24 - Operation on Two Phases
Use In a Tightly Sealed
Enclosure
When the device 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 device.
In the following test setup, the device is placed in the middle of the box, and no
other heat-producing items are inside the box. The load is placed outside 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 1 cm (0.39 in.). The following
measurement results can be used as a reference to estimate the temperature
rise inside the enclosure.
240V
+10%
max
L2
L1
L3
L
N
Power Supply
AC
DC
Attributes Values
Case A Case B
Enclosure size
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
Input voltage 230V AC 230V AC
Load 24V, 3.04 A (=80%) 24V, 3.8 A; (=100%)
Temperature inside the box 30.3 °C (86.54 °F) 31.7 °C (89.06 °F)
Temperature outside the box 21.0 °C (69.8 °F) 21.0 °C (69.8°F)
Temperature rise 9.3 K 10.7 K

20 Rockwell Automation Publication 1606-RM123A-EN-P - September 2021
DC Power Supply - 24V, 3.8 A, 90 W, Single-phase Input Reference Manual
Prohibited Applications This section covers applications in which the 1606-XLB90EQ power supply
shall not be used.
DC Input
Do not operate this power supply with DC-input voltage.
Charging of Batteries
Do not use the power supply to charge batteries.
Series Operation
Do not connect outputs of devices in a series connection for higher output
voltages.
Parallel Use to Increase Output Power
Do not use the power supply in parallel to increase the output power.
Parallel Use for 1+1 Redundancy
Do not use the power supply to build redundant systems.