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