Beckhoff PS2001-2440-0000 Operator's manual

Documentation | EN
PS2001-2440-0000
Buffer Module 24 V DC, 40 A, 160 ms
2021-06-21 | Version: 1.0

Table of contents
PS2001-2440-0000 3Version: 1.0
Table of contents
1 Overview.....................................................................................................................................................5
2 Foreword ....................................................................................................................................................6
2.1 Notes on the documentation..............................................................................................................6
2.2 Safety instructions .............................................................................................................................7
2.3 Terminology and abbreviations .........................................................................................................9
3 Basics .......................................................................................................................................................10
4 Technical data, application notes, wiring..............................................................................................12
4.1 Nominal electrical values.................................................................................................................12
4.2 Selection of the backup threshold voltage.......................................................................................14
4.3 Buffer storage time ..........................................................................................................................15
4.4 Charging time ..................................................................................................................................16
4.5 Operating diagrams .........................................................................................................................17
4.6 "Active" signal ..................................................................................................................................18
4.7 "Ready" signal .................................................................................................................................18
4.8 Inhibit input ......................................................................................................................................18
4.9 Efficiency and losses .......................................................................................................................18
4.10 Lifetime expectancy.........................................................................................................................19
4.11 MTBF...............................................................................................................................................19
4.12 Functional wiring diagram................................................................................................................19
4.13 Terminals and wiring .......................................................................................................................20
4.14 Connection diagrams.......................................................................................................................20
4.15 Front side and operating elements ..................................................................................................21
4.16 EMC.................................................................................................................................................22
4.17 Environment ....................................................................................................................................22
4.18 Protective functions and safety features..........................................................................................23
4.19 Dielectric strength............................................................................................................................23
4.20 Declaration of conformity and approvals .........................................................................................24
4.21 Dimensions and weight ...................................................................................................................25
5 Appendix ..................................................................................................................................................26
5.1 Accessories .....................................................................................................................................26
5.2 Documentation issue status ............................................................................................................27
5.3 Support and Service ........................................................................................................................28

Table of contents
PS2001-2440-00004 Version: 1.0

Overview
PS2001-2440-0000 5Version: 1.0
1 Overview
PS9011-2440-0000 | Buffer module 24V, 40A, 160ms
• Buffering with electrolytic capacitors
• Buffering of 24V loads
• Minimum hold-up time 0.16s at 40A, longer hold-up time with smaller loads
• Clear status display by Status LED and signaling terminals
• Extra-large screw terminals
The PS9011-2440-0000 Buffer Module is an additional device for regulated 24VDC power supply units that
can be used for various purposes:
• Bridging of failures of the DC supply network with additional power
• Extension of the hold-up time after failure of the AC voltage.
• Short-term provision of an additional peak current that is higher than the nominal current of the power
supply unit.
The buffer module uses maintenance-free electrolytic capacitors to store energy. This enables use even at
ambient temperatures up to +70°C.
The device requires no control wiring. It can be connected anywhere in parallel with the load circuit.
Buffer modules can be connected in parallel in order to increase the output current capacity or the hold-up
time
Overview of technical data *)
Overview of technical data PS9011-2440-0000
Supply voltage DC24V, -20%/+25% (19.2-30Vdc)
Required voltage for charging the capacitors 23 Vdc
Threshold voltage for buffer operation 22.5 V / VIN - 1V (adjustable)
Buffer voltage 22.5 V / VIN - 1V (adjustable)
Buffer current 40A
Charging duration Typ. 34s
Current consumption Typically 80mA (standby mode)
Max. 600mA (when charging)
Power loss 1.9W (standby mode)
Buffer time Min. 160ms (at 22.5V, 40A)
Min. 320ms (at 22.5V, 20A)
Typically 250ms (at 22.5V, 40A)
Typically 500ms (at 22.5V, 20A)
Typically 62s (at 22.5V, 0.1A)
Temperature range -25°C to +70°C (in operation)
Dimensions (W x H x D) 64 x 124 x 142mm
Weight 1040g
Markings/approvals CE, cULus
*) All values typical for 24V, 40A, +25°C ambient temperature and after a warm-up time of five minutes, unless specified otherwise

Foreword
PS2001-2440-00006 Version: 1.0
2 Foreword
2.1 Notes on the documentation
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
Trademarks
Beckhoff®, TwinCAT®, TwinCAT/BSD®, TC/BSD®, EtherCAT®, EtherCATG®, EtherCATG10®, EtherCATP®,
SafetyoverEtherCAT®, TwinSAFE®, XFC®, XTS® and XPlanar® are registered trademarks of and licensed by
Beckhoff Automation GmbH. Other designations used in this publication may be trademarks whose use by
third parties for their own purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, EP1456722, EP2137893, DE102015105702 with corresponding
applications or registrations in various other countries.
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.

Foreword
PS2001-2440-0000 7Version: 1.0
2.2 Safety instructions
Description of instructions
In this documentation the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
Damage to environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.
Intended use
This device is designed for installation in a housing and is intended for general professional use, for example
in industrial control systems or office, communication and measuring equipment.
Do not use this power supply in installations where a malfunction could cause serious injury or danger to
human life.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.

Foreword
PS2001-2440-00008 Version: 1.0
Safety information/installation requirements for PS9011-2420-0001 Buffer Module
DANGER
Danger of electric shock, fire, injuries, injuries resulting in death!
• Switch off the power supply before working on the device. Provide protection against unintentional re-
connection.
• Do not modify or attempt to repair the device.
• Do not open the device, as high voltages are present inside.
• Avoid foreign bodies entering the housing.
• Do not use the device in damp locations or in areas where moisture or condensation is likely to occur.
• Do not touch the device when it is switched on or immediately after it has been switched off. Hot sur-
faces can cause burns.
Further notes on installation requirements
• This device contains no parts that require maintenance. If an internal fuse trips, this is due to an
internal defect.
• If any damage or malfunction occurs during installation or operation, turn off the power supply
immediately and return the device to the factory for inspection.
• Install the device in a housing that provides protection against electrical, mechanical and fire
hazards.
• Mount the device on a DIN rail according to EN 60715 with the power terminals on the top side of
the device.
• Make sure that the wiring is correct by complying with all local and national regulations. Use suit-
able copper cables designed for a minimum operating temperature of 60°C at ambient tempera-
tures up to +45°C, 75°C at ambient temperatures up to +60°C and 90°C at ambient tempera-
tures up to +70°C. Make sure that all individual wires of a strand are inside the terminal connec-
tion.
• The device is designed for areas with a degree of pollution 2 in controlled environments. No con-
densation or frost is allowed.
• The device housing offers IP20 protection. The housing offers no protection against spilled liq-
uids.
• The insulation of the devices is designed such that it can withstand pulse voltages up to 1.5kV in
accordance with IEC 60664-1.
• The device can be supplied from a regulated power supply or a similar DC voltage source. The
continuous voltage between the supply voltage terminals and the PE potential may not exceed
60Vdc. Use a correspondingly dimensioned 24V power supply unit that can supply the addi-
tional internal current consumption required to charge the capacitors. Pay attention to the correct
polarity of the supply voltage. The device does not work if the voltage polarity is reversed. The
device must be supplied from a PELV or SELV source or an "isolated secondary circuit" in order
to guarantee a SELV or PELV level.
• If the buffer module is connected to a DC source that can supply a continuous current of more
than 80A, a 50A or 63A circuit breaker with a B or C characteristic must be connected between
the DC source and the buffer module.
• The device is designed for convection cooling and does not require an external fan. Do not ob-
struct the air flow or cover the ventilation grille!
• Observe the following minimum installation distances: 40mm above, 20mm below, 0mm left
and right.
• The device is designed for altitudes of up to 5000m.
• The maximum temperature of the ambient air is +70°C (+158°F). The operating temperature
corresponds to the ambient air temperature and is defined 2cm below the device.
• The device is designed for operation in the relative humidity range between 5% and 95%.
• For EMC reasons the signal cables (ready, active, inactive) must be shorter than 30m.

Foreword
PS2001-2440-0000 9Version: 1.0
2.3 Terminology and abbreviations
Power supply mode Describes a state in which the supply voltage lies in the range of the nominal
supply voltage and the supplying power supply unit can supply a sufficient
amount of current for the buffer module and the load. The mode can also be
called "normal mode".
Buffer operation Describes a state in which the input voltage lies below the transition threshold
value, the device is running on capacitors (buffering) and the output is loaded
within the permissible limits.
The mode can also be called "capacitor mode".
Inhibit mode Describes a state in which the buffering is deliberately disabled (e.g. for
service work).
T.b.d. Still to be defined, value or description will follow in due course.
DC 24V A value preceded by "AC" or "DC" represents a nominal voltage that contains
standard tolerances.
Example:
DC 12V refers to a 12V battery, regardless of whether it is fully charged
(13.7Vdc) or discharged (10Vdc).
24 Vdc A value followed by the unit Vac or Vdc is an instantaneous value that does
not contain any additional tolerances.
may A keyword indicating a choice without implied preference.
shall A keyword indicating a mandatory requirement.
should A keyword indicating a choice with a clearly preferred method of
implementation.

Basics
PS2001-2440-000010 Version: 1.0
3 Basics
Principle of operation
If the power supply unit supplies sufficient voltage, the buffer module stores energy in the integrated
electrolytic capacitors. In case of a voltage drop or failure, this energy is fed to the DC link in a controlled
manner.
Fig.1: Functional principle of the buffer module
Bridges power faults without interruption
Statistics show that 80% of all power faults last less than 0.2 s. These power faults are fully bridged by the
buffer unit. This increases the reliability of the complete system.
Fig.2: Bridging power failures
Extended hold-up time
Following a power failure or a power cut, the buffer unit maintains the load current for a defined timespan.
Process data can be saved and processes ended before the DC voltage is switched off. A controlled restart
is then possible.
Fig.3: Extended buffer time in case of a power failure
Simple to handle, extendable and maintenance-free
The buffer module requires no control wiring. It can be inserted anywhere in parallel with the load circuit.
Buffer modules can be connected in parallel in order to increase the output current capacity or the hold-up
time.
Fig.4: Parallel connection without control wiring

Basics
PS2001-2440-0000 11Version: 1.0
Fig.5: Typical wiring
Fig.6: Transition behavior

Technical data, application notes, wiring
PS2001-2440-000012 Version: 1.0
4 Technical data, application notes, wiring
4.1 Nominal electrical values
Electrical parameters
Supply voltage Nom. DC 24V -20%/+25%
Supply voltage range1) Nom. 19.2 - 30Vdc
Normal operating voltage range2) Typ. 23 – 30 Vdc
Transition voltage for switching to
buffer mode
Typ. 22.5 Vdc Backup threshold value jumper set to "22.5V fixed"
Typ. VIN – 1V Backup threshold value jumper set to "VIN – 1V"
(Refer also to the chapter "Selection of the backup threshold volt-
age" [}14]).
Transition voltage for switching from
buffer mode to supply mode
Typ. 22.5 Vdc Backup threshold value jumper set to "22.5V fixed"
Typ. VBUFFER + 1V Backup threshold value jumper set to "VIN – 1V"
(Refer also to the chapter "Selection of the backup threshold volt-
age" [}14]).
Buffer voltage Typ. Equal to the transition voltage for switching to buffer mode.
Residual ripple and noise voltage
- in buffer mode
Max. 200mVpp Generated by the buffer module.
(defined at 20Hz to 20MHz, 50Ohm)
- in power supply mode The residual ripple and noise voltage are defined by the power supply.
Current consumption Typ. 80mA When the capacitor is fully charged
Min. 400mA During the charging of the capacitors
Max. 600mA During the charging of the capacitors
Power loss Typ. 1.9W When the capacitor is fully charged
Buffer current Min. 40A
Buffer current overload behavior Electronically limited, buffering stops and capacitor is discharged under 17V.
See fig. "Output characteristic curve in buffer mode, 22.5V fixed mode, typ.
Permissible voltage between supply
voltage and housing ground
Max. 60Vdc or
42.4Vac
Continuous operation, IEC 62477-1
Capacitive and inductive loads no limit
1) Supply voltage range:
At voltages within the input voltage range, the control functions such as LEDs, monitoring functions, relay contacts, etc. function as nor-
mal. Within the input voltage range the device can either be in power supply mode or buffer mode.
2) Normal operating voltage range:
The normal operating voltage range describes the supply voltage that supports the full functionality of the buffer module (including
charging) without entering buffer mode.
Fig.7: Selection of a suitable power supply

Technical data, application notes, wiring
PS2001-2440-0000 13Version: 1.0
Fig.8: Output characteristic curve in buffer mode, 22.5V fixed mode, typ.

Technical data, application notes, wiring
PS2001-2440-000014 Version: 1.0
4.2 Selection of the backup threshold voltage
The buffer behavior – "Fixed Mode" or "Variable Mode" – can be selected with the backup jumper.
Fixed mode: (jumper in position "2-3" or "22.5V fixed")
If the supply output voltage falls below 22.5V, buffering begins and the supply voltage is maintained at this
level.
This setting is recommended:
• if power supplies other than the PS3xxx series are used
• with back-feeding loads
• if the buffer module is placed close to the load or
• in case of doubt.
Variable mode: (jumper in position "1-2" or "VIN – 1 V")
Buffering begins if the supply voltage drops by more than 1V. Buffering ends if the supply voltage increases
by more than 1V.
Voltage changes slower than 0.54V/s are ignored if the voltage is above 22.5V. Buffering begins
immediately below 22.5V.
This setting is recommended for all applications in which 22.5V is too low for the application or if the buffer
module is placed near the power supply.
The factory setting is fixed mode; if the jumper is missing, this also means fixed mode.

Technical data, application notes, wiring
PS2001-2440-0000 15Version: 1.0
4.3 Buffer storage time
The buffer time (sometimes also called autonomy time) is the maximum timespan over which the capacitor
can maintain the required output current. The buffer time mainly depends on the output current in buffer
operation.
Any number of buffer modules can be connected in parallel in order to increase the buffer time.
Buffer time Min. 160ms At 22.5V, 40A
Min. 320ms At 22.5V, 20A
Typ. 250ms At 22.5V, 40A
Typ. 500ms At 22.5V, 20A
Typ. 62s At 22.5V, 0.1A
Fig.9: Buffer time, typ.
Fig.10: Buffer time for low buffer currents, typ.

Technical data, application notes, wiring
PS2001-2440-000016 Version: 1.0
4.4 Charging time
The charging of the internal capacitors is indicated by the Status LED, which flashes at a low frequency (1.25
Hz).
Charging time Min. 29s Initial charging 1)
max 50s Initial charging 1)
min 24s Recharging 2)
max 40s Recharging 2)
1) Initial charging is the first charging after applying the voltage to the buffer module.
2) Recharging is the charging of the internal capacitors after voltage interruptions lasting less than 2 minutes.
Fig.11: Charging time, recharging

Technical data, application notes, wiring
PS2001-2440-0000 17Version: 1.0
4.5 Operating diagrams
Fig.12: Operating diagram
Fig.13: Signal circuit diagram

Technical data, application notes, wiring
PS2001-2440-000018 Version: 1.0
4.6 "Active" signal
The "Active" signal (pin 7) is an optocoupler output that has a low resistance during the discharging of the
buffer capacitors.
For a connection schematic, refer to the illustrations in the chapter Operating diagrams [}17] and
Connection diagrams [}20].
Signal voltage Max. 35 Vdc Voltage between pins 6 and 7
Signal current Max. 10mA
Voltage drop across
optocoupler
0.9V /
3V
At 1mA / 5mA while optocoupler has a low resistance
Leakage current Max. 50µA While optocoupler has a high resistance
Insulation voltage See chapter Dielectric strength [}23]
4.7 "Ready" signal
The "Ready" signal (pin 8) is an optocoupler output that has a low resistance when the buffer capacitors are
fully charged.
For a connection schematic, refer to the illustrations in the chapter Operating diagrams [}17] and
Connection diagrams [}20].
Signal voltage Max. 35 Vdc Voltage between pins 6 and 8
Signal current Max. 10mA
Voltage drop across
optocoupler
0.9V /
3V
At 1mA / 5mA while optocoupler has a low resistance
Leakage current Max. 50µA While optocoupler has a high resistance
Insulation voltage See chapter Dielectric strength [}23]
4.8 Inhibit input
The buffering can be inhibited or interrupted with the inhibit input (pin 9). To do this, pin 6 must be connected
to the positive pole of the terminal voltage or to the external control voltage and pin 9 must be connected to
the corresponding negative pole.
The inhibition of the device also results in the discharging of the internal capacitors. The capacitors cannot
be charged as long as the buffer module is in inhibit mode.
For a connection schematic, refer to the illustrations in the chapter Operating diagrams [}17] and
Connection diagrams [}20].
Signal voltage Max. 35 Vdc Voltage between pins 6 and 9
Signal current Max. 4mA Current limited
Inhibit mode The device does not buffer (or stops buffering) if the voltage between pin 6 and pin
9 is higher than 10V. The buffering functions again below 6V.
Insulation voltage See chapter Dielectric strength [}23]
4.9 Efficiency and losses
Efficiency Typ. >99% Power supply mode, 40A output current, capacitors fully
charged
Power losses Typ. 1.9W Power supply mode, 0A output current, capacitors fully
charged

Technical data, application notes, wiring
PS2001-2440-0000 19Version: 1.0
4.10 Lifetime expectancy
The lifetime expectancy shown in the table indicates the minimum number of operating hours (service life)
and is determined by the lifetime expectancy of the built-in electrolytic capacitors. The lifetime expectancy is
stated in operating hours and is calculated according to the specifications of the capacitor manufacturer. The
manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years (131,400h). Any
number exceeding this value represents a calculated theoretical service life which can be used to compare
devices.
Calculated lifetime expectancy 189,000h Standby mode, 40°C
536,000h Standby mode, 25°C
4.11 MTBF
MTBF stands for Mean Time Between Failure, which is calculated from the statistical failure rate of the
components and indicates the reliability of a device. It is a statistical representation of the probability of
equipment failure and does not necessarily represent the service life of a product.
The MTBF number is a statistical representation of the probability of equipment failure. An MTBF number of
1,000,000h, for example, means that statistically, if there are 10,000 devices in use, one device will fail every
100 hours. However, it is not possible to say whether the failed device has been in operation for 50,000
hours or only 100 hours.
For these device types the MTTF value (Mean Time To Failure) is identical to the MTBF value.
MTBF SN 29500,
IEC 61709
2,114,000h Standby mode, 40°C
3,937,000h Standby mode, 25°C
MTBF MIL HDBK
217F
272,000h Standby mode, 40°C, Ground Benign GB40
433,000h Standby mode, 25°C, Ground Benign GB25
95,000h Standby mode, 40°C, Ground Fixed GF40
143,000h Standby mode, 25°C Ground Fixed GF25
4.12 Functional wiring diagram
Fig.14: Functional wiring diagram

Technical data, application notes, wiring
PS2001-2440-000020 Version: 1.0
4.13 Terminals and wiring
The terminals are designed to be finger-safe according to IP20 and are suitable for field or factory wiring.
Supply voltage, housing ground Signal
Type Screw terminals Pluggable screw terminals
Connection cross-section e*: max. 16mm²
f*: max. 10mm²
a*: max 10mm² (d<5.2mm)
e*: max. 2.5mm²
f*: max. 2.5mm²
a*: max. 2.5mm² (d<2.25mm)
Connection cross section
(AWG)
e*: AWG 22-8
f*: AWG 22-8
a* AWG 22-8
e*: AWG 22-14
f*: AWG 22-14
a*: AWG 22-14
Strip length 12mm 6mm
e* = solid wire
f* = stranded wire
a* = with ferrule
4.14 Connection diagrams
Fig.15: General connection diagrams; signals that are supplied by an external voltage source
Fig.16: Parallel connection of buffer modules; decoupling of buffered lines