Allen-Bradley 1606-XLS960BUFFER User manual

Buffer Module - 24V, 40 A,
160 ms
Catalog Number 1606-XLS960BUFFER
Reference Manual Original Instructions

2Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Buffer Module - 24V, 40 A, 160 ms 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-RM105A-EN-P - July 2020 3
Table of Contents
Terminology and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Working Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bridge Mains Faults without Interruption . . . . . . . . . . . . . . . . . . . . . . 7
Extend Hold-up Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Easily Add and Expand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Select the Backup Threshold Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fixed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Variable Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Buffer Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Charging Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operating Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Active Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ready Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Inhibit Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Efficiency and Power Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lifetime Expectancy and Mean Time Between Failure . . . . . . . . . . . . . . 12
Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Terminals and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Front Side and User Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dielectric Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Physical Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mounting Brackets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Wall Mounting Bracket 1606-XLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Side Mounting Bracket 1606-XLA-S76 . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Table of Contents
Notes:

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 5
Terminology and
Abbreviations
Product Overview The 1606-XLS960 buffer module is a supplementary device for regulated DC
24V power supplies, which can be used for various purposes:
• Deliver DC-power to bridge failures of the DC voltage supply system.
• Extend the hold-up time after loss of the AC power.
• Deliver extra short-term peak current above the current rating of the
power supply.
The buffer module uses service-free electrolytic capacitors for storing the
energy, which allows usage even at ambient temperatures up to +70 °C (158 °F).
The buffer module does not require any control wiring. It can be added in
parallel to the load circuit at any given point.
Buffer modules can be connected in parallel to increase the output ampacity or
the hold-up time.
Product features:
• Buffering with electrolytic capacitors instead of lead acid batteries
• Buffering of 24V loads
• Minimum hold-up time 0.16 seconds at 40 A, longer hold-up time at
lower loads
• Clear status indication by LED status indicator and signaling terminals
• Extra large screw terminals
Terminology Descriptions
Power supply mode
Describes a condition where the supply voltage is in the rated supply voltage range and the
supplying power supply can deliver enough current for the buffer module and the load. This
mode can also be called “Normal mode”.
Buffer mode
Describes a condition where the input voltage is below the transfer threshold level, the unit
is running on capacitors (buffering), and the output is loaded within the allowed limits. The
mode can also be called “Capacitor mode”.
Inhibit mode Describes a condition where buffering is disabled on purpose (for example: for service
actions).
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 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 single dash alone in a table cell indicates there is no information to be included in that
cell.

6Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Specifications
Catalog Numbers
Attributes Values Notes
Supply voltage DC 24V -20%/+25% 19.2…30V DC
Required voltage to charge capacitors 23V DC —
Threshold voltage for buffer mode 22.5V / VIN-1V Selectable
Buffer voltage 22.5V / VIN-1V Selectable
Buffer current 40 A —
Charging time 34 s typ —
Current consumption 80 mA typ Stand-by mode
600 mA max During charging
Power dissipation 1.9 W Stand-by mode
Buffer time
160 ms min At 22.5V, 40 A
320 ms min At 22.5V, 20 A
250 ms typ At 22.5V, 40 A
500 ms typ At 22.5V, 20 A
62 s typ At 22.5V, 0.1 A
Temperature range -25…+70 °C (-13 °F…158 °F) operational
Dimensions 64 x 124 x 142 mm
(2.52 x 4.88 x 5.59 in.) W x H x D
Weight 1040 g (2.3 lb) —
Catalog Numbers Descriptions
1606-XLS960BUFFER Buffer module
1606-XLC Panel/wall-mount bracket
1606-XLA-S76 Side-mount bracket

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 7
Functional Description This section describes how the buffer module works in general and some
specific uses.
Working Principle
When the power supply provides sufficient
voltage, the buffer module stores energy in the
integrated electrolytic capacitors. If there is a
voltage dip or loss, this energy is released to the
DC bus in a regulated process.
Bridge Mains Faults without Interruption
Statistics show that 80% of all mains faults last less
than 0.2 seconds. The buffer module bridges any
mains faults of this length. This increases the
reliability of the system as a whole.
Extend Hold-up Time
Once mains power fails or is switched off, the
buffer unit continues to provide the load current
for a defined period. Process data can be saved and
processes can be terminated before the DC power
switches off. Controlled restarts are then possible.
Easily Add and Expand
The buffer module does not require any control
wiring. It can be added parallel to the load circuit
at any given point. Buffer modules can be
connected in parallel to increase the output
ampacity or the hold-up time.
Figure 1 - Typical Wiring Diagram Figure 2 - Transfer Behavior
PE
L
+
-
N
Power
Supply
+ -
Load
+ -
Buer
Module
optional
Buer
Mode
Supply
Voltage
Power
Supply
Output
t
t
Transfer Threshold
Power
Supply
Mode
Power
Supply
Mode
DC
Charge
Discharge
Storage
AC
DC
Buer Module
AC
DC
Buer Module
DC
Buer
Module
Power
Supply Load
AC
+
-

8Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Electrical Ratings
Attributes Values Notes
Supply voltage Nom DC 24V -20%/+25% —
Supply voltage range(1) Nom 19.2…30V DC —
Normal operating voltage range(2) Typ 23…30V DC —
Transfer voltage for switching into
buffer mode
Typ 22.5V DC Back-up threshold jumper set to “22.5V fixed”
Typ VIN – 1V Back-up threshold jumper set to “VIN – 1V”
—— SeealsoSelect the Backup Threshold Voltage on page 9.
Transfer voltage for switching from
buffer mode into power supply mode
Typ 22.5V DC Back-up threshold jumper set to “22.5V fixed”
Typ VBUFFER + 1V Back-up threshold jumper set to “VIN – 1V”
—— SeealsoSelect the Backup Threshold Voltage on page 9.
Buffer voltage Typ Same as the transfer voltage for switching into buffer mode.
Ripple and noise voltage
- in buffer mode
- in power supply mode Max 200 mVpp Generated by the buffer module. Defined at 20 Hz to 20 MHz, 50 Ω.
The the power supply defines the ripple and noise voltage.
Current consumption
Typ 80 mA When capacitor is fully charged
Min 400 mA During charging of the capacitors
Max 600 mA During charging of the capacitors
Power dissipation Typ 1.9 W When capacitor is fully charged
Buffer current Min 40 A —
Buffer current overload behavior — Electronically limited, buffering stops and capacitor gets discharged below 17V. See Figure 4.
Allowed voltage between supply
voltage and chassis ground Max 60V DC or 42.4V AC Continuous, IEC 62477-1
Capacitive and inductive loads — No limitation —
(1) Supply Voltage Range: At voltages within the input voltage range, control functions such as LEDs, monitoring features, and relay contacts, are
functioning normally. Within the input voltage range, the unit can either be in power supply mode or in buffer mode.
(2) Normal Operating Voltage Range: The normal operating voltage range describes the supply voltage, which supports the full functionality of the
buffer module (including charging) but without entering the buffer mode.
Figure 3 - Selection of an Appropriate Power Supply Figure 4 - Output Characteristic in Buffer Mode,
22.5V Fixed Mode, typ
Internal
current
consumption
Current
consumption
for charging
Load
Current
Power
Supply
Current
Buer Voltage
0
400
4
8
12
28V
16
20
64 A248 16 32 48 56
Output Current
24 22.5V
Buering stops
below 17V

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 9
Select the Backup
Threshold Voltage
The functionality of the buffer is determined by what mode the buffer is in,
either Fixed mode or Variable mode. You can set the mode using the backup
jumper selector. The factory default setting is Fixed mode. If the buffer has no
jumper, it is also in Fixed mode.
Fixed Mode
The buffer module is in Fixed mode when the jumper is in position “2-3” or
position “22.5V fixed”.
If the supply output voltage falls below 22.5V, buffering starts and the supply
voltage is kept at this level.
Fixed mode is recommended in the following situations:
• when power supplies other than bulletin 1606-XL S power supplies are
used
• with back-feeding loads
• when the buffer module is placed close to the load
•wheneverindoubt
Variable Mode
The buffer module is in Variable mode when the jumper in position “1-2” or
position “VIN – 1V”.
Buffering starts if the supply voltage decreases by more than 1V. Buffering
ends when supply voltage increases by more than 1V.
Voltage changes slower than 0.54 V/s are ignored if the voltage is above 22.5V.
Below 22.5V buffering starts immediately.
Variable mode is recommended in the following situations:
• 22.5V is too low for the application
• when the buffer module is placed close to the power supply

10 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Buffer Time The buffer time (sometimes also called autonomy time) is the maximum
period for which the capacitor can maintain the required output current. The
buffer time mainly depends on the output current in buffer mode.
To increase the buffer time, any given number of buffer modules can be
connected in parallel.
Charging Time The internal capacitors are charging when the LED status indicator is flashing
with a slow frequency (1.25 Hz).
Figure 7 - Charging Time, Recharging
Attribute Values Notes
Buffer time
Min 160 ms At 22.5V, 40 A
Min 320 ms At 22.5V, 20 A
Typ 250 ms At 22.5V, 40 A
Typ 500 ms At 22.5V, 20 A
Typ 62 s At 22.5V, 0.1 A
Figure 5 - Buffer Time, typ Figure 6 - Buffer Time for Small Buffer
Currents, typ
Buer Current, typ.
0
0 0.3 3 s
10
30
20
40 A
0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.4
Buer Time
Buer Current, typ.
0
318s
0.5
1.5
1.0
2.0 A
6912 15
Buer Time
Attribute Values Notes
Charging time
Min 29 s Initial charging(1)
(1) Initial charging is the first charge after voltage is applied to the
buffer module.
Max 50 s
Initial charging(1)
Min 24 s
Recharging(2)
(2) Recharging is the charging of the internal capacitors after
voltage interruptions shorter than 2 minutes.
Max 40 s
Recharging*2)
Charge
20
0 5 10 45 s
Charging Time
40
80
60
100%
15 20 25 30 35 40
max. min.typ.

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 11
Operating Diagrams
Active Signal The signal “Active” (pin 7) is an opto-coupler output, which is low ohmic while
buffer capacitors, are discharged.
For the wiring scheme, see Figure 9, Figure 20 on page 21, and Figure 21 on
page 21.
Ready Signal The signal “Ready” (pin 8) is an opto-coupler output, which is low ohmic when
buffer capacitors, are fully charged.
For the wiring scheme, see Figure 9, Figure 20 on page 21, and Figure 21 on
page 21.
Figure 8 - Operating Diagram Figure 9 - Signal Schematic
Ready
t
Active
t
Optocoupler high ohmic
Optocoupler high ohmic
Optocoupler low ohmic
Optocoupler
low ohmic
V
Mains
t
V
Buer
Capacitor
t
V
out
t
Charging Mode
LED
t
Buer Mode
Hold-up Time Power Supply
Standby
Mode
10 Hz1.25 Hz
8 Ready
7 Active
6 +
5,1V
3 mA
9 Inhibit
Buer
Module
Attributes Values Notes
Signal voltage Max 35V DC Voltage between pin 6 and 7
Signal current Max 10 mA
Voltage drop across opto-coupler — 0.9V / 3V At 1 mA / 5 mA while opto-coupler is low ohmic
Leakage current Max 50 μA While opto-coupler is high ohmic
Isolation voltage See Dielectric Strength on page 17.
Attributes Values Notes
Signal voltage Max 35V DC Voltage between pin 6 and 7
Signal current Max 10 mA
Voltage drop across opto-coupler — 0.9V / 3V At 1 mA / 5 mA while opto-coupler is low ohmic
Leakage current Max 50 μA While opto-coupler is high ohmic
Isolation voltage See Dielectric Strength on page 17.

12 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Inhibit Input Buffering can be disabled or interrupted with the Inhibit input (pin 9). To use
the Inhibit input, connect pin 6 to either the positive pole of the terminal
voltage or to the external control voltage, and connect pin 9 to the
corresponding negative pole.
Inhibiting the unit also discharges the internal capacitors. Charging of the
capacitor is not possible when the buffer module is in Inhibit mode.
For the wiring scheme, see Figure 9 on page 11, Figure 20 on page 21, and
Figure 21 on page 21.
Efficiency and Power
Losses
Lifetime Expectancy and
Mean Time Between Failure
Attributes Values and Notes
Signal voltage Max 35V DC (between pin 6 and pin 9)
Signal current Max 4 mA, current limited
Inhibit mode — The unit does not buffer (or stops buffering) if the voltage between pin 6 and pin 9 is higher than 10V.
Below 6V buffering functions again.
Isolation voltage See Dielectric Strength on page 17.
Attributes Values Notes
Efficiency Typ >99% Power supply mode, 40 A output current, capacitors fully charged
Power losses Typ 1.9 W Power supply mode, 0 A output current, capacitors fully charged
Attributes Values Notes
Calculated lifetime expectancy(1)
(1) The calculated lifetime expectancy that is shown in the table indicates the minimum operating hours (service life). This
lifetime expectancy 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 manufacturer specification of the capacitor. The
manufacturer of the electrolytic capacitors only states 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.
189 000 h Stand-by mode, 40 °C (104 °F)
536 000 h Stand-by mode, 25 °C (77 °F)
MTBF(2) SN 29500, IEC 61709
(2) 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 is a statistical representation of the likelihood of a device to fail. An MTBF value 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.
2 114 000 h Stand-by mode, 40 °C (104 °F)
3 937 000 h Stand-by mode, 25 °C (77 °F)
MTBF(2) MIL HDBK 217F
272 000 h Stand-by mode, 40 °C (104 °F), Ground Benign GB40
433 000 h Stand-by mode, 25 °C (77 °F), Ground Benign GB25
95 000 h Stand-by mode, 40 °C (104 °F), Ground Fixed GF40
143 000 h Stand-by mode, 25 °C (77 °F), Ground Fixed GF25

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 13
Functional Diagram
Terminals and Wiring The terminals are IP20 fingersafe constructed and suitable for field and
factory wiring.
When wiring terminals, be aware of these considerations:
• Use appropriate copper cables that are designed for minimum
operating temperatures of:
- 60 °C (140 °F) for ambient up to 45 °C (113 °F)
- 75 °C (167 °F) for ambient up to 60 °C (140 °F)
- 90 °C (194 °F) for ambient up to 70 °C (158 °F)
• Follow national installation codes and installation regulations.
• Ensure that all strands of a stranded wire enter the terminal
connection.
• Securely tighten or close unused terminal compartments.
• Use ferrules if needed. Ferrules are allowed.
Figure 10 - Functional Diagram
Buer Capacitor
Charger &
Inrush Limiter
Buer
Capacitor
Buer Capacitor
Discharger
Status
LED
7 Active
6 (+)
Ready Monitor
+
-
Active Monitor
+
-
8 Ready
9 Inhibit
Opto-coupler
Buer
Capacitor
Shut-Down
Input / Output
Voltage Monitor
Back-up
Level
Selector
Reverse-
Polarity
Protection
-
-
+
Safety and
Over-
Voltage
Protection
Chassis
Ground
Supply
Voltage
Opto-coupler
Opto-coupler
Attribute Values for Supply Voltage Values for Signals
Type Screw terminals Pluggable screw terminals
Solid wire 16 mm2max (0.0248 in2max) 2.5 mm2max (0.0039 in2max)
Stranded wire 10 mm2max (0,0155 in2max) 2.5 mm2max (0.0039 in2max)
American Wire Gauge 22…8 AWG max 22…14 AWG
Wire diameter max 5.2 mm (including ferrules)
(0.20 in.) (including ferrules) 2.25 mm (including ferrules) (0.09 in.) (including ferrules)
Wire stripping length 12 mm typ (0.5 in. typ) 6 mm (0.25 in.)
Tightening torque 2.3 N•m (20.5 lb•in) 0.4 N•m (3.5 lb•in)
Screwdriver 3.5 mm (0.14 in.) or 5 mm (0.20 in.) slotted
or cross-head No 2 3 mm (0.12 in.) slotted

14 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Front Side and User
Elements
Figure 11 - Front Side of Buffer Module User Elements
1 Chassis Ground Terminal
To be connected on the top side of the
housing with a ring-type terminal (ring
cable lug) which is suitable for an M4
screw. Connection of the chassis to
ground (earth) is optional and only
required for specific applications.
2 Supply Voltage Terminals
Screw terminals, two negative pins.
+ Positive supply voltage terminal
– Negative (return) supply voltage terminal
3 Status Indicator
This green LED indicates the following
information:
- OFF: Capacitors are discharged or supply
voltage is below 22V.
- ON: Capacitors are fully charged
- Slow flashing (1.25 Hz): Capacitors are
getting charged.
- Fast flashing (10 Hz): Capacitors are
getting discharged.
4Back-upThresholdJumper
-Option 1: Fixed mode (Jumper in position
2-3). The unit switches to buffer mode as
soon as the voltage falls below 22.5V.
-Option 2: Variable mode (Jumper in
position 1-2). Unit switches to buffer mode
when input voltage decreases by 1V.
Voltage changes slower than 0.54 V/s is
ignored if the voltage is above 22.5V.
Below 22.5V buffering starts immediately.
For more details, see Select the Backup
Threshold Voltage on page 9.
5 Signal Connector
4-pole plug connector with screw
termination comprises the following
signals:
- “Active” signal, for details see Active
Signal on page 11.
- “Ready” signal, for details see Ready
Signal on page 11.
- “Inhibit” input, for details see Inhibit
Input on page 12.
12
3
4
5

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 15
Electromagnetic
Compatibility
The buffer module is suitable for applications in industrial, residential,
commercial, and light industry environments.
The following table shows the EMC immunity for all operating modes
according to generic standards EN 61000-6-1 and EN 61000-6-2.
The following table shows EMC emissions for Standby and Charging modes
according to generic standards EN 61000-6-3 and EN 61000-6-4.
The buffer module has two converters with variable frequencies included.
Attributes Standards Values Criteria
Electrostatic discharge EN 61000-4-2 Contact discharge(1) 8 kV Criterion A(2)
Air discharge(1) 15 kV Criterion A
Electromagnetic RF field EN 61000-4-3 80 MHz…2.7 GHz 10V/m Criterion A
Fast transients (Burst) EN 61000-4-4
Input lines 2 kV Criterion A
Output lines 2 kV Criterion A
Signals lines pin 6, 7, 8, 9(3) 2 kV Criterion A
Surge voltage on supply voltage terminals EN 61000-4-5 + -0.5 kV Criterion A
+ / - chassis ground 1 kV Criterion A
Surge voltage on inhibit input, active signal,
and ready signal EN 61000-4-5 Not applicable since the specified length of the signal wire is shorter than 30 m (98 ft).
Conducted disturbance EN 61000-4-6 0.15…80 MHz 10V Criterion A
(1) Chassis ground connection earthed (grounded).
(2) Criterion A: Buffer module shows normal operation behavior within the defined limits.
(3) Tested with coupling clamp.
Attributes Standards Notes
Conducted emission, supply voltage IEC/CISPR 16-1-2, IEC/CISPR 16-2-1 Limits for DC power ports acc.
EN 61000-6-3 fulfilled.
Radiated emission EN 55011, EN 55022 Class B
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
Switching Frequency
6…610 kHz Charging converter at 24V input (is only active during charging). The frequency
depends on the state of charge of the capacitors.
10…70 kHz Buffer converter at buffering at 22.5V. The frequency depends on the output
current. The values are between 10% and 100% of the nominal buffer current.

16 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Environment
Protection Features
Safety Features
Attributes Values Notes
Operational temperature(1)
(1) Operational temperature is the same as the ambient or surrounding temperature and is defined as the air
temperature 2 cm (0.79 in.) below the unit.
-25…+70 °C (-13…158 °F) —
Storage temperature -40…+70 °C (-40…158 °F) For storage and transportation
Humidity(2)
(2) Do not energize while condensation is present.
5...95% r.H. IEC 60068-2-30
Vibration sinusoidal 2…12.5 Hz: ±1.6 mm (0.06 in.); 12.5…500 Hz: 1 g
2 hours / axis IEC 60068-2-6
Vibration random 0.5 m²(s³)
2 hours / axis IEC 60068-2-64
Shock 15 g 6 ms, 10 g 11 ms 3 bumps / direction,
18 bumps in total IEC 60068-2-27
Altitude 0…6000 m (0…20,000 ft) Approvals apply only up to 2000 m (6562 ft)
Overvoltage category
III IEC 62103, EN 62477-1
II IEC 62103, EN 62477-1, above 2000 m (6562
ft) altitude
Degree of pollution 2 IEC 62103, EN 62477-1, not conductive
LABS compatibility The unit does not release any silicone or other LABS-critical substances and is
suitable for use in paint shops.
Attributes Values Notes
Electrical protection Electronically protected against overload, no-load, and short-circuits
Overvoltage protection in buffer mode 32V DC typ
35V DC max
If there is an internal buffer module anomaly, a redundant
circuit limits the max output voltage. Buffering stops and
automatically attempts to restart.
Degree of protection IP 20 EN/IEC 60529
Penetration protection > 3.5 mm (0.14 in.) For example, screws and other small parts
Reverse polarity protection Yes -35V max
Input overvoltage protection Yes 35V max, no harm, or anomaly of the unit
Internal input fuse Not included —
Attributes Values Notes
Class of protection No classification according to IEC 61140 or
IEC 60950-1 possible
Install the buffer module
according to Class III rules
Isolation resistance
> 500 MΩ Supply voltage to signal port
> 500 MΩ Supply voltage to housing
> 500 MΩ Signal port to housing
Chassis ground terminal
resistance < 0.1 Ω Between housing and chassis ground terminal

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 17
Dielectric Strength The signal port (active and ready signal and inhibit input) is floating and
separated from the supply voltage.
The manufacturer conducts type and factory tests. Field tests can be conducted
in the field using the appropriate test equipment, which applies the voltage
with a slow ramp (2 seconds up and 2 seconds down). Connect all poles of the
power port terminals together and all poles of the signal port before
conducting the test. When testing, set the cutoff current settings to the value
in the table below. The following isolation tests were performed:
Figure 12 - Dielectric Strength
Approvals
Test or Setting Time A B C
Type test 60 s 500V AC 500V AC 500V AC
Factory test 5 s 500V AC 500V AC 500V AC
Field test 5 s 500V AC 500V AC 500V AC
Cutoff current
setting — > 1 mA > 1 mA > 1 mA
Supply
Voltage Chassis
Active and Ready Signal
Inhibit Input
A
CB
Approval Name Approval Symbol Notes
EU Declaration of Conformity The CE marking indicates conformance with the EMC
Directive
IEC 60950-1 2nd Edition CB Scheme, Information Technology Equipment
UL 60950-1 2nd Edition Recognized for use as Information Technology
Equipment, U.S.A. (UL 60950-1), and Canada (C22.2 No.
60950-1); E-File: QQGQ(2,8). E168663
UL 508 Listed for use as Industrial Control Equipment; U.S.A. (UL 508) and Canada (C22.2 No. 107-1-01); E-File:
NMTR(7).E56639
IND. CONT. E
Q.

18 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Physical Dimensions and
Weight Attributes Values and Notes
Width 64 mm (2.13 in.)
Height 124 mm (4.88 in.)
Depth 142 mm (5.59 in.) The DIN rail height must be added to the unit depth to
calculate the total required installation depth.
Weight 1040 g (2.3 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 or 15 mm (0.30 in. or 0.59 in.).
Housing material Body: Aluminum alloy Cover: Zinc-plated steel
Installation clearances Left/right of the unit: 0 mm (0.00 in.) On top of the unit: 40 mm (1.57 in.)
On bottom of the unit: 20 mm (0.79 in.)
Figure 13 - Front View Figure 14 - Side View

Rockwell Automation Publication 1606-RM105A-EN-P - July 2020 19
Mounting Brackets This section describes the brackets that can be used to mount the buffer
module.
Wall Mounting Bracket 1606-XLC
This bracket is used to mount the buffer module on a
wall without using a DIN rail. To mount a unit on a wall
or a panel, the two Zinc-plated steel brackets have to be
installed on the side of the unit.
Figure 15 - Wall Mounting Isometric View Figure 16 - Wall Mounting Dimensions

20 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Side Mounting Bracket 1606-XLA-S76
This bracket is used to mount the buffer module sideways
with or without using a DIN rail. The two aluminum
brackets and the black plastic slider of the unit have to be
detached, so that the steel brackets can be mounted.
For sideway DIN rail mounting, the removed aluminum
brackets and the black plastic slider must be mounted on the
steel bracket.
Figure 17 - Side Mounting
Without DIN Rail Brackets
Figure 18 - Side Mounting
With DIN Rail Brackets Figure 19 - Side Mounting Dimensions