Rockwell Automation Allen-Bradley 1606-XLDD240E User manual

DC/DC Converter - 24V/24V,
10 A, 240 W
Catalog Number 1606-XLDD240E
Reference Manual Original Instructions

2Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
DC/DC Converter - 24V/24V, 10 A, 240 W 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-RM115A-EN-P - September 2020 3
Table of Contents
Terminology and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Requirements for the Supplying Source. . . . . . . . . . . . . . . . . . . . . . . . . 8
Input Inrush Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Soft Start Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hold-up Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Efficiency and Power Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Front Side and User Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connection Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Daisy Chaining of Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lifetime Expectancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Mean Time Between Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety and Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Dielectric Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Fulfilled Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Physical Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1606-XLC Wall or Panel Mount Brackets . . . . . . . . . . . . . . . . . . . . . . . 20
1606-XLA-S44 Side Mount Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1606-XLERED Redundancy Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
1606-XLSBUFFER24 Buffer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Peak Current Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Output Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Charging of Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Series Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Parallel Use to Increase Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Parallel Use for Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
1+1 Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
N+1 Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Use in a Tightly Sealed Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Mounting Orientations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Notes:

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 5
Terminology and
Abbreviations
All values in this document are typical values that are specified under the
following conditions unless otherwise noted:
•24VDCinputvoltage
• 24V, 10 A output
• 25 °C (77 °F) ambient temperature
• after a 5 minutes run-in time
Product Overview
Product features:
•24VDCinput
•Isolated24VDCoutput
• Efficiency 94.2%
• Width only 42 mm (1.65 in.)
• 20% output power reserves
• Full power between -25…+60 °C (-13…+140 °F)
• Soft start function
• Minimal inrush current surge
• Reverse input polarity protection
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”.
DC 24V A value 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
disregarding whether it is full (13.7V) or flat (10V).
24V DC A value with the unit (V AC or V DC) at the end is a momentary value without any
additional tolerances included.
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.
Figure 1 - 1606-XLDD240E The 1606-XLDD240E is a DIN rail mountable
DC/DC converter that provides a floating,
stabilized, and galvanically separated SELV/
PELV output voltage.
It offers high efficiency, a small size, and a wide
operational temperature range. It has a power
reserve of 20% included, which can be used
continuously at temperatures up to 45 °C (113 °F).
The 1606-XLDD240E is suitable for a wide
variety of applications due to its high immunity
to transients and power surges, low
electromagnetic emission, and international
approval package.

6Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Specifications
Catalog Numbers
Attributes Values Notes
Output voltage DC 24V Nominal
Adjustment range 24…28V Factory setting 24.1V
Output current
12…10.3 A Below 45 °C (113 °F) ambient
10…8.6 A At 60 °C (140 °F) ambient
7.5…6.5 A At 70 °C (158 °F) ambient
Derate linearly between 45…70 °C (158 °F)
Input voltage DC 24V -25%/+46%
Input current 10.5 A —
Input inrush current 6 A peak —
Efficiency 94.2% —
Losses 14.8 W —
Hold-up time 4 ms —
Temperature range -25…+70 °C
(-13…+158 °F) —
Size (W x H x D) 42 x 124 x 117 mm
(1.65 x 4.88 x 4.61 in.) Without DIN rail
Weight 500 g (1.1 lb) —
Catalog Numbers Descriptions
1606-XLDD240E DC/DC Converter
1606-XLC Wall or panel mount bracket
1606-XLA-S44 Side mount bracket

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 7
DC Input The input can be powered from batteries or similar DC sources. To maintain a
SELV or PELV output, the source must be a PELV or SELV source, or an
Isolated Secondary Circuit.
Check for correct input polarity. The device does not operate when the voltage
is reversed.
Attributes Values Notes
DC input Nom DC 24V -25%/+46%
DC input range Min 18.0…35.0V DC Continuous operation
Allowed voltage between input
and earth/ground Max 60V DC or 42.2V AC Continuous operation, according to IEC 62477-1
Allowed input ripple voltage Max 5Vpp In the frequency range from 47…500 Hz, the momentary input voltage
must always be within the specified limits.
Turn-on voltage Typ 17.5V DC Steady-state value, see Figure 2
Shut-down voltage Typ 15.5V DC Steady-state value, see Figure 2
Input current Typ 10.5 A At 24V DC input and 24V, 10 A output load, see Figure 4
Typ 14.3 A At 18V DC input and 24V, 10 A output load, see Figure 4
Start-up delay Typ 200 ms See Figure 2
Rise time Typ 200 ms At 24V, 10 A constant current load, 0 mF load capacitance, see Figure 3
Typ 200 ms At 24V, 10 A constant current load, 10 mF load capacitance, see Figure 3
Turn-on overshoot Max 250 mV See Figure 3
Input capacitance Typ 4300 µF Installed inside the device, external capacitors on the input are allowed
without any limitations.
External input protection — The device is designed, tested, and approved for branch circuits up to 50 A without additional protection device. If an external fuse is used, then to avoid a nuisance tripping of the circuit
breaker, do not use circuit breakers smaller than 20 A B- or C-Characteristic.
Figure 2 - Input Voltage Range Figure 3 - Turn-on Behavior, Definitions
Turn on
17.5V DC
V
IN
P
OUT
Shutdown
32.4V DC 15.5V DC 18.0V DC
Rated input range
35.0V DC
Start-up
delay Rise Time
Overshoot
- 5%
Output
Voltage
Input
Voltage
Figure 4 - Input Current Versus Output Load
12 A
234 6 8
0
4
8
12
16 A
10
Output Current
57911
Input: 24V DC
Input
Current,
typ
Input: 18V DC

8Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Requirements for the Supplying Source
In certain circumstances, the input filter of the DC/DC converter can show a
resonant effect, which is caused by the supplying network. Especially when
additional external input filters are used, a superimposed AC voltage can be
generated on the input terminals of the DC/DC converter. This superimposed
AC voltage might cause a malfunction of the unit. Therefore, additional input
filters are not recommended. To avoid the resonant effects, the minimal
resistance of the supplying network which depends on the inductance of the
input network, shall be above the boundary curve in Figure 5.
Figure 5 - External Input Filter Requirements to Avoid Filter Instabilities
Input Inrush Current An active inrush limitation circuit (inrush limiting NTC resistor that is
bypassed by a MOSFET) limits the input inrush current after turn-on of the
input voltage.
The charging current into EMI suppression capacitors is disregarded in the
first microseconds after switch-on.
1 m Ω
10 m Ω
100 m Ω
1 Ω
0.1 mH 1 mH 10 mH
Inductance of the supplying network
Resistance of the
supplying network
(a) max
(b) typ
(a)
(b)
Attributes Values Notes
Inrush current
Max 8 A At 25 °C (77 °F) ambient, cold start
Max 25 A At 60 °C (140 °F) ambient, cold start
Typ 6 Apeak At 25 °C (77 °F) ambient, cold start
Typ 22 Apeak At 60 °C (140 °F) ambient, cold start
Inrush energy Max 1 A2sBetween -25…+70 °C (-13…+158 °F), cold start
Figure 6 - Typical Input Inrush Current Behavior at Nominal Load
and 25 °C (77 °F) Ambient
• Input: 24V DC
• Output: 24V, 10 A, constant current load
• Ambient: 25 °C (77 °F)
• Input current: 2 A / DIV
• Input voltage: 5V / DIV
• Output voltage: 5V / DIV
• Time basis: 100 ms / DIV

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 9
Soft Start Feature After the DC/DC converter is turned on, the internal output current rises
slowly to its nominal value. This method charges the output capacitors
(internal and external capacitors) slowly and avoids high input currents
during turn-on. High input currents can produce a high voltage drop on the
input wiring (especially with long and thin cables) which reduces the terminal
voltage on the DC/DC converter. If the terminal voltage is below the shut-
down voltage, the DC/DC converter turns off and makes a new startup
attempt. This effect is avoided with the integrated soft start function. This
function increases the rise time of the output voltage by a small amount.
Output The output provides a SELV/PELV rated voltage, which is galvanically isolated
from the input voltage and is designed to supply any kind of loads, including
unlimited capacitive and inductive loads.
The output is electronically protected against overload, no-load, and short-
circuits. If there is a protection event, audible noise may occur.
Attributes Values Notes
Output voltage Nom 24V —
Adjustment range
Min 24…28V Guaranteed value from 23…28V
Max 30V 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 setting — 24.1V ±0.2%, at full load, cold unit
Line regulation Max 25 mV Between 18…35V DC input voltage variation
Load regulation Max 100 mV Between 0…10 A load variation, static value
Ripple and noise voltage Max 50 mVpp Bandwidth 20 Hz…20 MHz, 50 Ω
Output current
Nom 12 A At 24V and an ambient temperature below 45 °C (113 °F)
Nom 10 A At 24V and 60 °C (140 °F) ambient temperature
Nom 7.5 A At 24V and 70 °C (158 °F) ambient temperature
Nom 10.3 A At 28V and an ambient temperature below +45°
Nom 8.6 A At 28V and 60 °C (140 °F) ambient temperature
Nom 6.5 A At 28V and 70 °C (158 °F) ambient temperature
Overload behavior — Continuous current
Overload/ short-circuit
current Max 15 A Continuous current
Output capacitance Typ 4500 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 7 - Output Voltage Versus Output Current at
24V DC Input Voltage, Typ Figure 8 - Current Limitation Versus Input Voltage, 23V Constant Voltage Load, Typ
Output Voltage
0048
4
8
12
28V
16
20
24
16
A
62 10 12 14
Adjustment
Range
Output Current
Output Current
21 27
14 A
13.0
13.5
36V DC302418
10.0
10.5
11.0
11.5
12.5
12.0
33
Input Voltage

10 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Hold-up Time The input side of the DC/DC converter is equipped with a bulk capacitor that
keeps the output voltage alive for a certain period when the input voltage dips
or is removed. The bulk capacitor can be discharged by loading the DC/DC
converter on the output side or through a load that is parallel to the input.
There is no protection in the DC/DC converter that prevents current from
flowing back to the input terminals. If prevention is needed, use an external
diode.
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
Hold-up Time
Typ 8 ms At 24V DC input voltage, 24V, 5 A output, see Figure 9
Min 6.5 ms At 24V DC input voltage, 24V, 5 A output, see Figure 9
Typ 4 ms At 24V DC input voltage, 24V, 10 A output, see Figure 9
Min 3.2 ms At 24V DC input voltage, 24V, 10 A output, see Figure 9
Figure 9 - Hold-up Time Versus Input Voltage Figure 10 - Shutdown Test Setup
0
2
4
6
8 ms
18 20 22 24 28V DC
Input Voltage
Hold-up Time
(a): 24V, 5 A, typ
(b): 24V, 5 A, min
(c): 24V, 10 A, typ
(d): 24V, 10 A, min
26
(a) (b)
(c) (d)
Load
+
-
DC/DC
Converter
DC
Source
+
-
Input
Output
+
-
S1
Figure 11 - Shutdown Behavior, Definitions
- 5%
Hold-up Time
Output
Voltage
Intput
Voltage
S1 opens

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 11
Efficiency and Power
Losses Attributes Values for
Input 24V DC Notes
Efficiency Typ 94.2% At 24V, 10 A
Typ 93.7% At 24V, 12 A (Power Boost)
Average efficiency(1)
(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 25% of the time
• 75% of the nominal load for 25% of the time
• 100% of the nominal load for 25% of the time
Typ 94.3% At 25% at 2.5 A, 25% at 5 A,
25% at 7.5 A. 25% at 10 A
Power losses
Typ 1.75 W At no output load
Typ 6.8 W At 24V, 5 A
Typ 14.7 W At 24V, 10 A
Typ 19.5 W At 24V, 12 A
Figure 12 - Efficiency Versus Output Current at 24V
Output and 24V DC Input Voltage, Typ Figure 13 - Losses Versus Output Current at 24V Output and 24V DC Input Voltage, Typ
Eciency
2
90
92
94
89
95%
12 A4810
Output Current
6
91
93
Power Losses
0 2 4 8 10 12 A
0
3
9
15
18 W
6
6
12
Output Current
Figure 14 - Efficiency Versus Input Voltage at 24V,
10 A, Typ Figure 15 - Losses Versus Input Voltage at 24V, 10 A, Typ
Eciency
18 20 22 26 28 32V DC
95%
92.5
93.5
94.5
94.0
93.0
92.0
24 30
Input Voltage
Power Losses
13
14
15
16
17
18
19 W
18 20 24 26 28 32V DC22 30
Input Voltage

12 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Functional Diagram Figure 16 - Functional Diagram
Front Side and User
Elements
+
+
-
-
VOUT
Input Fuse
&
Input Filter
Output
Voltage
Regulator
Power
Converter Output
Filter
DC
OK
Output
Over-
Voltage
Protection
Reverse
Polarity
Protection
&
Inrush
Limiter
Chassis
Ground
+
-
Figure 17 - Front Side User Elements
1Outputterminals(screw terminals)
Screw terminals, dual terminals per pole, both pins are equal
+ Positive output (two identical + poles)
- Negative / return output (two identical - poles)
2 Output voltage potentiometer
Open the flap to set the output voltage. Factory set: 24.1V
3DCOKstatusindicator(green)
On when the voltage on the output terminals is > 21V
4 Input terminals (screw terminals)
+ Positive input
- Negative / return input
Chassis Ground: to bond the Housing to Ground, PE, or Functional Earth
1
2
3
4

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 13
Connection Terminals The terminals are IP20 fingersafe constructed and suitable for field- and
factory wiring.
Daisy Chaining of Outputs
Daisy chaining (jumping from one DC/DC-converter output to the next) is
allowed as long as the average output current through one terminal pin does
not exceed 25 A. If the current is higher, use a separate distribution terminal
block.
Attributes Values
Input Output
Type Screw terminals Screw terminals
Solid wire 6 mm2max 6 mm2max
Stranded wire 4 mm2max 4 mm2max
American Wire Gauge 20…10 AWG 20…10 AWG
Wire diameter max
(including ferrules) 2.8 mm (0.11 in.) 2.8 mm (0.11 in.)
Recommended
tightening torque 1 N•m (9 lb•in) 1 N•m (9 lb•in)
Wire stripping length 7 mm (0.28 in.) 7 mm (0.28 in.)
Screwdriver 3.5 mm (0.138 in.)
slotted or Phillips No 1 3.5 mm (0.138 in.) slotted or Phillips No 1
Figure 18 - Daisy Chaining of Outputs Figure 19 - Using Distribution Terminals
DC/DC
Converter
+ + - -
Input
Output
Load
+ -
25 A max
DC/DC
Converter
+ + - -
Input
Output
Load
+ -
Distribution
Terminals
DC/DC
Converter
+ +
- -
Input
Output
DC/DC
Converter
+ +
- -
Input
Output

14 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Lifetime Expectancy The lifetime expectancies that are shown in the table indicate the minimum
operating hours (service life), and are determined by the lifetime expectancies
of the built-in electrolytic capacitors. 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. It is the 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.
Attribute Values for
Input 24V DC Notes
Lifetime expectancy
299,000 hr At 24V, 5 A and 40 °C (104 °F)
103,000 hr At 24V, 10 A and 40 °C (104 °F)
56,000 hr At 24V, 12 A and 40 °C (104 °F)
844,000 hr At 24V, 5 A and 25 °C (77 °F)
292,000 hr At 24V, 10 A and 25 °C (77 °F)
159,000 hr At 24V, 12 A and 25 °C (77 °F)
Attribute Values for
Input 24V DC Notes
MTBF SN 29500, IEC 61709 731,000 hr At 24V, 10 A and 40 °C (104 °F)
1,321,000 hr At 24V, 10 A and 25 °C (77 °F)
MTBF MIL HDBK 217F
358,000 hr At 10 A and 40 °C (104 °F); Ground Benign GB40
556,000 hr At 10 A and 25 °C (77 °F); Ground Benign GB25
731,000 hr At 10 A and 40 °C (104 °F); Ground Fixed GF40
142,000 hr At 10 A and 25 °C (77 °F); Ground Fixed GF25

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 15
Electromagnetic
Compatibility
The EMC behavior of the device is designed for applications in industrial,
residential, commercial, and light industrial environments.
The device is investigated according to the generic standards EN 61000-6-1, EN
61000-6-2, EN 61000-6-3, and EN 61000- 6-4.
EMC Immunity
Attributes Standards Values Criteria(1)
(1) Criterion A: The device shows normal operation behavior within the defined limits.
Electrostatic discharge EN 61000-4-2 Contact discharge 8 kV Criterion A
Air discharge 15 kV 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 4 kV Criterion A
Output lines 2 kV Criterion A
Surge voltage on input EN 61000-4-5 + -1kVCriterionA
+/- chassis ground 2 kV Criterion A
Surge voltage on output EN 61000-4-5 + - 500V Criterion A
+ / -  chassis ground 1 kV Criterion A
Conducted disturbance EN 61000-4-6 0.15…80 MHz 20V Criterion A
EMC Emission
Attributes Standards Notes
Conducted emission on input lines IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 LimitsforDCpowernetworks according to
EN 61000-6-3 fulfilled
Conducted emission on output lines IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 According to IEC 61000-6-4:2018 Annex
Radiated emission EN 55011, EN 55022 Class B
This device complies with FCC Part 15 rules.
Operationissubjectedtofollowingtwoconditions:(1)thisdevicemaynotcauseharmfulinterference,and(2)this device must accept
any interference received,includinginterferencethatmaycauseundesiredoperation.
Switching Frequency
Attribute Values Notes
Main converter 50...300 kHz Output load and input voltage dependent

16 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Environment
Attributes Values Notes
Operational temperature -25…+70 °C (-13…+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
3.2 W/ 1 °C (3.2 W/ 1.8 °F) Between 45…60 °C (113…140 °F)
6 W/1 °C (6 W/ 1.8 °F) Between 60…70 °C (140…158 °F)
15 W/1000 m (15 W/ 3280 ft) or
5 °C/1000 m (9 °F/ 3280 ft) Foraltitudes >2000 m (6560 ft), see Figure 21
9 W/ -5 kPa (9 W/-0.725 psi) or
3 °C/ -5 kPa (5.4 °F/ -0.725 psi) For atmospheric pressures <80 kPa (11.60 psi), see Figure 21
The derating is not controlled by hardware. The user must take care to stay below the derated
current limits in order not to overload the unit.
Humidity 5…95% r.h. According to IEC 60068-2-30
Atmospheric pressure 110…47 kPa (15.95…6.82 psi) See Figure 21 for details
Altitude Up to 6000 m (20,000 ft) See Figure 21 for details
Degree of pollution 2 According to IEC 62477-1, not conductive
Vibration sinusoidal(1)
(1) 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.) and standard orientation.
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 in total
According to IEC 60068-2-27
LABS compatibility As a rule, only non-silicon precipitating materials are used. The unit conforms to the LABS criteria
and is suitable for use in paint shops.
Corrosive gases Tested according to ISA-71.04-1985, Severity Level G3 and IEC 60068-2-60 Test Ke Method 4 for a
service life of 10 years min in these environments.
Audible noise Some audible noise may be emitted from the power supply during no load, overload, or short
circuit.
Figure 20 - Output Current Versus Ambient Temperature Figure 21 - Output Current Versus Altitude at 24V
0
-25 0 20 40 70 °C
2
4
6
8
10
12 A
60
Ambient Temperature
A: Continuous
B: Short term
AB
Allowed Output Current at 24V
2000 m 4000 m 6000 m
2
4
6
8
10
12 A
Altitude
Allowed Output Current at 24V
AP
(1)
80 kPa 62 kPa 47 kPa110 kPa
0 m
(1) Atmospheric pressure
A: Ambient < 60 °C
B: Ambient < 45 °C
C: Short term
A
B
C

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 17
Safety and Protection
Features
Dielectric Strength The output voltage is floating and has no ohmic connection to the ground. The
output is insulated to the input by a double or reinforced insulation.
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 input-terminals
together and all output poles before conducting the test. When testing, set the
cutoff current settings to the value in the following table.
It is recommended that either the + pole, the – pole or any other part of the
output circuit shall be connected to the earth/ground system. This helps to
avoid situations in which a load starts unexpectedly or cannot be switched off
when unnoticed earth faults occur.
Attributes Values Notes
Isolation resistance
Min 500 MΩ At delivered condition between input and output, measured with 500V DC
Min 500 MΩ AtdeliveredconditionbetweeninputandChassis Ground, measured with500V DC
Min 500 MΩ AtdeliveredconditionbetweenoutputandChassis Ground, measured with500V DC
PE resistance Max 0.1 Ω ResistancebetweenPEterminalandthehousingin the area of the DIN rail mountingbracket.
Output overvoltage protection
Typ 31V DC —
Max 32.5V DC —
—If there is an internal anomaly, a redundant circuit limits the maximum output voltage. The output shuts down
and automatically attempts to restart.
Class of protection — III According to IEC 61140
Degree of protection — IP 20 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 15.
Internal input fuse — Included Not-user-replaceable, slow-blow, high-breaking-capacity fuse
Touch current (leakage current) The leakage current, which is produced by the DC/DC converter itself, depends on the input voltage ripple and must be
investigated in the final application. For a smooth DC input voltage, the produced leakage current is less than 100 µA.
Figure 22 - Dielectric Strength Test or Setting Time A B C
Type test 60 s 1500V AC 1500V AC 500V AC
Routine test 5 s 1500V AC 1500V AC 500V AC
Field test 5 s 1000V AC 1000V AC 500V AC
Cutoff current
setting — 40 mA 20 mA 12 mA
A
C
B
+
Input
Chassis
ground
Output
-
+
-

18 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Approvals
Fulfilled Standards
Approval Names Approval Symbols Notes
EC Declaration of Conformity
The CE marking indicates conformance with the following:
– RoHS Directive
–EMCDirective
– Low Voltage Directive (LVD)
IEC 60950-1
2nd Edition CB Scheme, Information Technology Equipment
IEC 61010-2-201
2nd Edition CB Scheme for electrical equipment for measurement, control, and laboratory use - Part 2-201: Particular requirements for control equipment
ANSI/UL 61010-2-201
(former UL 508) Listed as Open Type Device for use in Control Equipment UL Category NMTR, NMTR7 E-File: E56639
Marine GL(GermanischerLloyd)classified Environmental category: C,EMC2
Marine and offshore applications
EAC TR Registration Registration for the Eurasian Customs Union market (Russia, Kazakhstan, Belarus)
Ind. Cont. Eq.
Standard Names Standard Symbols Notes
RoHS Directive Directive 2011/65/EU of the European Parliament and the Council of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and
electronic equipment.
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 (REACH)
IEC/EN 61558-2-16
(Annex BB) Safety Isolating Transformers corresponding to Part 2-6 of the IEC/EN 61558
Safety Isolating Transformer

Rockwell Automation Publication 1606-RM115A-EN-P - September 2020 19
Physical Dimensions and
Weight Attributes Values and Descriptions
Width 42 mm (1.65 in.)
Height 124 mm (4.88 in.)
Depth 117 mm (4.61 in.) The DIN rail height must be added to the unit depth to calculate the total
required installation depth.
Weight 500 g (1.10 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 (0.30 in.) or 15 mm (0.59 in.).
Housing material
Body: Aluminum alloy
Cover: Zinc-plated steel
Installation clearances
Keep the following installation clearances:
• 40 mm (1.57 in.) on top
• 20 mm (0.79 in.) on the bottom
• 5 mm (0.20 in.) on the left side and 5 mm (0.20 in.) on the right side. If the
adjacent device is a heat source, such as another power supply, increase the
side clearances from 5 mm (0.20 in.) to 15 mm (0.59 in.). If the device is
permanently loaded with less than 50% of the rated power, the side
clearances can be reduced to zero.
Penetration protection Small parts like screws, or nuts with a diameter larger than 3.5 mm (0.138 in.)
Figure 23 - Front View Figure 24 - Side View

20 Rockwell Automation Publication 1606-RM115A-EN-P - September 2020
Accessories This section covers products that can be used with the 1606-XLDD240E DC/DC
converter.
1606-XLC Wall or Panel Mount Brackets
1606-XLC wall mount brackets are used to mount the device on a flat surface or
panel without using a DIN rail. The wall mount brackets can be mounted
without detaching the DIN rail brackets. The catalog number 1606-XLC
contains two brackets needed for one device.
Figure 25 - Wall or Panel Mount Brackets Figure 26 - Hole Pattern Figure 27 - Side View
All dimensions in mm
All dimensions in mm
Figure 28 - Right Front View Figure 29 - Left Front View Figure 30 - Right Back View