Puls DIMENSION UB Series User manual

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
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DC-UPS CONTROL UNIT
▪1-Battery-Concept - Each 12V battery is charged and monitored
separately for longest battery life, matching of batteries not
necessary
▪Output is decoupled from the input to separate load circuits into
buffered and non-buffered sections
▪Allows VRLA battery sizes between 12Ah and 200Ah;
“Battery Size”selector for various battery sizes
▪50% Extra output power for up to 5s
▪Superior battery management for longest battery life
▪Comprehensive diagnostic and monitoring functions
▪“Replace Battery”signal included
▪“Battery-Low Prewarning”signal included
▪Selectable buffer time limiter
▪Temperature controlled battery charging
▪3 Years warranty
PRODUCT DESCRIPTION
The UB40.241 is an uninterruptible power supply controller (DC-
UPS controller), which is used in combination with a 24V power
supply and an external 24V-battery pack to bridge power
failures. When the power supply provides sufficient voltages,
the DC-UPS controller charges the battery. When the power
supply voltage fails, the energy stored in the battery is released
to the DC bus in a regulated process.
A unique feature is the battery charger, which can balance two
unmatched batteries and which includes two independent
battery testers for the two 12V batteries connected in series.
This feature makes matching batteries unnecessary and allows
for precise battery charging, testing and optimized usage of the
battery capacity to achieve the longest battery service life.
The device includes various battery diagnostic functions
including a battery-low pre-warning signal that ensure a reliable
operation of the entire system. Furthermore, temperature
controlled charging extends the life of the batteries. It also
includes a selectable buffer time limiter as well as “Ready”,
“Buffering”and “Replace battery”contacts. For safety and
maintenance, an inhibit-input signal is included to enable phases
without enforced buffering.
SHORT-FORM DATA
Input voltage
DC 24V
±25%
Min. input voltage to start
charging and to enable
battery mode
23V
Transfer voltage to switch
to battery mode
22.2V
Internal current
consumption
3.2A / 6.2A
<65Ah / ≥65Ah, incl.
charging current
Voltage loss
55mV / 110mV
Input to output,
at 20A / 40A
110mV / 220mV
Battery input to output, at
20A / 40A
Output current
50A
Below +50°C
40A
At +60°C
30A
At +70°C
60A
Short term, up to 5s
Derate linearly between +50 and +70°C
Power losses
6.0W
At 40A in power supply
mode, full batteries
9.9W
At 40A in battery mode
Temperature range
-25°C to +70°C
Size (wxhxd)
46x124x127mm
Without DIN-rail
Weight
530g / 1.17lb
ORDER NUMBERS
DC-UPS UB40.241 Standard DC-UPS unit
Batteries UZK24.122 Battery module 24V, 12Ah
UZO24.122 UZK24.122 w/o batteries
UZK24.262 Battery module 24V, 26Ah
UZO24.262 UZK24.262 w/o batteries
UZK24.262-E1 Battery extension 24V, 26Ah
UZO24.262-E1 UZK24.262-E1 w/o batteries
UZW24.100 Connection and wiring kit
UZW24.101 Connection and wiring kit
UZS24.100 Sensor and center-tap board
MAIN APPROVALS
For details or a complete approval list see chapter 19.
planned
IND. CONT. EQ.
planned

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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INDEX
Page Page
1. Terminology and Abbreviations ...................................3
2. Intended Use................................................................4
3. Installation Instructions................................................4
4. Typical Wiring Scheme .................................................5
5. Input and Output Characteristics .................................6
6. Batteries and Battery Charging ....................................8
7. Buffer Time.................................................................10
8. Inhibit-Input ...............................................................12
9. Signal Outputs ............................................................13
10. Efficiency and Power Losses.......................................14
11. Functional Diagram ....................................................14
12. Front Side and User Elements ....................................15
13. Connection Terminals ................................................17
14. Lifetime Expectancy ...................................................18
15. MTBF ..........................................................................18
16. EMC ............................................................................19
17. Environment...............................................................20
18. Safety and Protection Features..................................21
19. Approvals and Fulfilled or Tested Standards..............22
20. Regulatory Compliance.............................................. 22
21. Physical Dimensions and Weight ............................... 23
22. Accessories................................................................. 24
22.1. ZM10.WALL –Wall/Panel Mount Bracket........ 24
22.2. ZM12.SIDE - Side Mounting Bracket................. 25
22.3. UZS24.100 –Sensor Board for DC-UPS............. 25
22.4. UZK24.122 –24V, 12AH Battery Module ......... 26
22.5. UZK24.262 –24V, 26AH Battery Module ......... 26
22.6. UZK24.262-E1 –24V, 26AH Battery Module
Extension ...................................................................... 27
22.7. UZW24.100 –Connection and Wiring Kit......... 28
22.8. UZW24.101 –Connection and Wiring Kit......... 28
23. Application Notes....................................................... 29
23.1. Output Circuit Breakers.................................... 29
23.2. Battery Replacement Intervals......................... 30
23.3. Series Operation............................................... 32
23.4. Paralleling of Modules...................................... 32
23.5. Troubleshooting ............................................... 34
The information given in this document is correct to the best of our knowledge and experience at the time of publication. If not
expressly agreed otherwise, this information does not represent a warranty in the legal sense of the word. As the state of our
knowledge and experience is constantly changing, the information in this data sheet is subject to revision. We therefore kindly ask you
to always use the latest issue of this document (available under www.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.
Packaging and packaging aids can and should always be recycled. The product itself may not be disposed of as domestic refuse.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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1. TERMINOLOGY AND ABBREVIATIONS
DC-UPS Abbreviation for Uninterruptible Power Supply system with a DC input and a DC output.
A DC-UPS utilizes batteries as back-up energy source.
T.b.d. To be defined, value or description will follow later.
DC 24V A figure displayed with the AC or DC before the value represents a nominal voltage with standard
tolerances included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V).
24Vdc A figure with the unit (Vdc) at the end is a momentary figure without any additional tolerances included.
may A key word indicate flexibility of choice with no implied preference.
shall A key word indicate a mandatory requirement.
should A key word indicate flexibility of choice with a strongly preferred implementation.
Normal mode See “Power supply mode”
Buffer mode See “Battery mode”
Inhibit mode Describes a condition where buffering is disabled on purpose (e.g. for service actions).
Power supply mode Describes a condition where the input voltage is in the rated input voltage range and the supplying power
supply can deliver a sufficient amount of current for
the DC-UPS and the load. Additionally, it is assumed
that the output is loaded within the allowed limits
and the battery is charged, if necessary.
The mode can also be called “Normal mode”.
Battery mode Describes a condition where the input voltage is
below the transfer threshold level, the unit is running
on batteries (buffering) and the output is loaded
within the allowed limits.
The mode can also be called “Buffer mode”.
Battery
Mode
Output
Voltage
Input
Voltage
t
t
Transfer Threshold
Power
Supply
Mode
Power
Supply
Mode

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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2. INTENDED USE
This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control, process control,
monitoring and measurement equipment or the like.
Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten human life without additional
appropriate safety devices, that are suited for the end-application.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.
3. INSTALLATION INSTRUCTIONS
WARNING
Risk of electrical shock, fire, personal injury or death.
- Turn power off before working on the device. Protect against inadvertent re-powering.
- Do not modify or repair the unit.
- Do not open the unit as high voltages are present inside.
- Use caution to prevent any foreign objects from entering the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on, and immediately after power-off. Hot surfaces may cause burns.
Obey the following installation instructions:
This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. The tripping of an internal fuse is caused by an internal defect.
If damage or malfunction should occur during installation or operation, immediately turn power off and send unit to the factory for
inspection.
Turn power off and disconnect the battery fuse before working on the device.
Install the device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the battery terminals on the bottom of the unit.
The input can be powered from a regulated power supply or a similar DC source. Use an appropriately sized power supply, which can
deliver the additionally required internal current consumption of the DC-UPS and the required current for charging the batteries. If a
power supply with a continuous output current greater than 50A is used, a fuse with 63A B- or C-Characteristic must be connected
between the power supply and the DC-UPS. The continuous voltage between the input and ground must not exceed 60Vdc. The input
must be powered from a PELV or SELV source or an “Isolated Secondary Circuit” in order to maintain a SELV or PELV output. Check for
correct input and battery polarity. The device will not operate when the voltage is reversed.
Use only VRLA lead acid batteries with a capacity between 12Ah and 200Ah.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that are designed for a
minimum operating temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient temperatures up to +60°C and 90°C
for ambient temperatures up to +70°C. Ensure that all strands of a stranded wire enter the terminal connection.
Do not use wires smaller than 6mm2(AWG 10) and not longer than 2x1m between the power supply and the DC-UPS controller. Longer
or smaller gauge wires can cause malfunctioning of the system.
Do not use wires smaller than 6mm2(AWG 10) and not longer than 2x1.5m between the battery and the DC-UPS controller. Longer or
smaller gauge wires can change performance of the system.
Use two fuses each 35A or 40A in parallel (ATOF® 287 035 or ATOF® 287 040 from Little fuse or an UL listed fuse with the same
characteristics) in the battery circuit. The battery fuse protects the wires between the battery and the DC-UPS and shall be located close
to the battery.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed.
The device is designed as “Class of Protection III” equipment according to IEC 61140.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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The enclosure of the device provides a degree of protection of IP20.
A disconnecting means shall be provided for the input and the battery input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation
grid!
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side. Increase the 5mm to
15mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50%, the 5mm can be reduced
to zero.
The device is designed for altitudes up to 5000m (16400ft). Above 2000m (6560ft) a reduction in output current is required.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the same as the ambient or surrounding
air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
Use a 4A fuse (ATOF® 287 004 from Little fuse or an UL listed fuse with same characteristics) between the connection point of the two
12V batteries and the “Center Tap” connection point of the DC-UPS. An equivalent protection is included on the original battery
modules. The center tap connection is not mandatory but enables an individual charging and monitoring of the two batteries.
Optionally, a PT1000 temperature sensor can be connected to terminals point 11 and 12 to measure the battery temperature. This
adjusts the charging voltage according to the battery temperature which extends the battery life. This sensor is already installed in the
original battery modules.
4. TYPICAL WIRING SCHEME
Fig. 4-1 Typical wiring diagram
24VPower
Supply
+
-
UB40.241
Input
+
-
+
-
24VBattery
Module
+
Buffered
Load
+
-
Non-
buffered
Load
+
-
24V
buffered
branches
24V
Non-bufferd
branches
Temp.
Sensor
Output
Battery
-
Bat1
12V
Bat2
12V
Center Tap
Temp.Sensor
DC-UPS
AC
DC
Output
Input
N L PE
+
+
optional
UZK24
+
-
Note1
Note2
Donot usewiressmaller than6mm
2
(AWG10)andnot longerthan2x1m
betweenthepowersupplyandtheDC-UPScontroller.
Donot usewiressmaller than6mm
2
(AWG10)andnot longerthan2x1.5m
betweenthebatteryandtheDC-UPScontroller.
Note1
Note2

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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5. INPUT AND OUTPUT CHARACTERISTICS
The input can be powered from a regulated power supply or a similar DC source. Use an appropriately sized power supply, which can
deliver the additionally required internal current consumption of the DC-UPS and the required current for charging the batteries. If a
power supply with a continuous output current greater than 50A is used, a fuse or
circuit breaker with 63A (B- or C-Characteristic) must be connected between the
power supply and the DC-UPS. The continuous voltage between the input and ground
must not exceed 60Vdc. The input must be powered from a PELV or SELV source or an
“Isolated Secondary Circuit” in order to maintain a SELV or PELV output. Check for
correct input and battery polarity. The device will not operate when the voltage is
reversed.
The output is connected to the input through a back-fed protection (MOSFET). In
power supply mode, the output voltage follows the input voltage decreased by a
small voltage loss. In battery mode, the output voltage follows the battery voltage decreased by a small voltage loss.
The output can supply any kind of loads, including inductive loads and capacitive loads. If capacitors with a capacitance larger than 40mF
are connected to the output, the unit might switch off in order to protect itself. If the load inductance is larger than 0.5mH, the unit can
be damaged.
Input voltage
Nom.
DC 24V
±25%
Input voltage range
Nom.
18-30Vdc
Control functions such as LEDs, monitoring features, relay contacts,
etc. are working. The unit can either be in power supply mode or in
battery mode.
Max.
30-35Vdc
Temporarily allowed, no damage to the DC-UPS.
The red error LED will report “Input Voltage”, charging and buffering
are not possible.
Normal operating input voltage
ranges
Nom.
23-30Vdc
This range describes the input voltage, which supports the full
functionality of the DC-UPS (including charging) but without entering
the battery mode.
Transfer voltage for switching into
battery mode
Typ.
22.2Vdc
Input current
The input current can be calculated by adding the output current and the internal
current consumption. The current for charging the batteries is included in the internal
current consumption.
Internal current consumption
Typ.
Typ.
Max.
Typ.
Max.
Typ.
60mA
3.2A
4.0A
6.2A
7A
2A
When batteries are fully charged
Includes charging current for battery size settings of 12Ah, 26Ah and
38Ah
Includes charging current for battery size settings of 65Ah, 100Ah
and 150Ah
Above 40A input current due to reduced charging current
Output voltage
Nom.
DC 24V
Input to output voltage loss in
power supply mode
Typ.
Typ.
55mV
110mV
At 20A load current
At 40A load current
Battery input to output voltage loss
in battery mode
Typ.
Typ.
110mV
220mV
At 20A load current
At 40A load current
Output current
Nom.
Nom.
Nom.
Nom.
50A
40A
30A
60A
Continuous, below +50°C
Continuous, at +60°C
Continuous, at +70°C
Short term for max. 5s, below +70°C
Derate linearly between +50°C and +70°C
Overload behavior in power supply
mode
Typically, the current limitation of the supplying power source limits the
current in an overload condition. There is no overload control included in the
Internal
current
consumption
Current
consumption
for battery
charging
Output
Current
Input
Current

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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DC-UPS. The user has to take care by himself to stay below the allowed output
currents in order not to overload the unit.
Output short circuit current in
power supply mode
Corresponds to the short-circuit current of the power supply or the current
limitation of an input fuse, if installed.
Overload behavior in battery mode
Time-delayed switch-off
Tripping delay in battery mode
Typ.
Typ.
Typ.
Typ.
5s
2.3s
0.73s
0.05ms
At 60A
At 70A
At 100A
At shorted output
Return current
Typ.
-250µA
Leakage current to the input of the DC-UPS in battery mode
Back-feeding loads
Max.
35V
The unit is resistant and does not show malfunctioning when a
load feeds back voltage to the DC-UPS. It does not matter
whether the DC-UPS is on or off.
Fig. 5-1 Input to output voltage loss,
typ.
Fig. 5-2 Battery input to output voltage loss, typ.
Input to Output Voltage Loss, typ.
0mV 20A
25mV
50mV
75mV
100mV
50A40A
Output Current
0
125mV AB
A... 25°C
B... 60°C
10A 30A
150mV
Batteryinput toOutput VoltageLoss, typ.
0mV 20A
50mV
100mV
150mV
200mV
50A40A
Output Current
0
250mV AB
A... 25°C
B... 60°C
10A 30A
300mV
Fig. 5-3 Voltage loss measurement setup
Fig. 5-4 Overload current in battery mode,
(tripping characteristic) typ.
V
Power
Supply
+
-
U IN
VoltageLoss U IN = U OUT -
AV
I OUT
U OUT
Variable
Load,
0-25A
UB40.241
Input Output
Output Current, typ.
50A
10µs
100µs
1ms
10ms
0.1s
1s
10s
100A 150A 200A 300A

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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6. BATTERIES AND BATTERY CHARGING
The battery is not included in the DC-UPS. The battery is one of the most important parts of a DC-UPS system, which needs to be
carefully selected while also paying close attention to storage, charging and environmental conditions. Select the proper battery
capacity according to the required buffer time and select the right battery quality to achieve the requirements for changing intervals.
Batteries are service parts and need to be replaced periodically and also need to be replaced when the internal battery tests of the DC-
UPS report an unexpected failure.
The device has a battery size selector included, which allows an optimal use of different battery sizes.
Batteries smaller than 12Ah are only recommended when the load current is below 20A.
Charging:
During charging, the DC-UPS consumes additional current from the input. The supplying power source must be able to deliver the
additional internal current consumption (including the charging current) specified as input current in the table in the chapter “Input and
Output Characteristic”.
A special feature of this device is the automatic reduction of the charging current to 2A when the input current reaches 40A. This should
help to prevent an overload of a 40A power supply.
The device charges the batteries in a constant current / constant voltage (CC-CV) mode.
When the battery center-tap connection is installed, the two 12V batteries are charged with a balancing function. This adaptive charging
mode enables up to 1A more in charging current for the battery which require a higher current to get fully charged, while the other
battery gets up to 1A less. This results in a faster and more efficient battery charging and makes matched (paired) batteries unnecessary.
The center-tap connection is optional and if not installed, both batteries will be charged with one common charging voltage. The device
automatically recognizes if the center-tap connection is present or not.
When charging is approximately 85% completed, the individual green “Ready” LED for the specific battery stops flashing and is on solid.
When the temperature sensor (PT1000) is installed, the end-of-charge-voltage is temperature compensated. The device automatically
recognizes if a temperature sensor is connected or not. A list of suitable PT1000 temperature sensors from different vendors can be
provided.
In case no temperature sensor is installed, the end-of-charge-voltage is fixed to a value which corresponds to a battery temperature of
40°C.
Frequent charging below +5°C (41°F) reduced the lifetime of the battery and should be avoided. Low temperatures increase the battery
impedance and also change the battery characteristics. This could result in a false “replace battery” signal or an unexpected interruption
of a buffer event, especially with small batteries. For this reason, the charging current is reduced at low temperatures depending on the
battery size.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
9/34
Setting of battery size
selector
12Ah
26Ah
38Ah
65Ah
100Ah
150Ah
Battery voltage
24V
24V
24V
24V
24V
24V
2x 12V batteries in series
Recommended battery sizes
12Ah -
17Ah
18Ah -
34Ah
35Ah -
50Ah
51Ah -
80Ah
81Ah -
130Ah
131Ah -
200Ah
Required min. battery
voltage for charging
2 x 7V
14V
2 x 7V
14V
Center-tap connected
Center-tap not connected
Below this voltage level, charging
does not start and the DC-UPS
reports “check wiring”
Charging current
3A
6A
In constant current mode
Reduced charging current
2A
2A
To avoid overloading of the power
supply, charging current is
automatically reduced when the input
current is larger than 40A
2A
2A
At battery temperatures above +50°C
or below -15°C
2A
2A
At battery voltages below 20V
2A
2A
At input voltages below 22.8V
End-of-charge-voltage
2 x13.25V
Center-tap connected,
no temperature sensor connected
26.5V
Center-tap not connected,
no temperature sensor connected
2x 13.1 to 14.2V (below +50°C), 2x 12.9 at 60°C
(13.6V applies for +20°C and changes with -18mV/°C)
Center-tap connected,
temperature sensor connected
26.2V to 28.4V (below +50°C), 25.8V (at +60°C)
(27.2V applies for +20°C and changes with -36mV/°C)
Center-tap not connected,
temperature sensor connected
Temperature range for
which the charging process is
enabled
-25°C to +60°C
Corresponds to the temperature
readings of the external temperature
sensor
Deep-discharge protection
10.6V
9.3V
21.2V
18.6V
10.6V
9.3V
21.2V
18.6V
10.6V
9.5V
21.2V
19.0V
10.7V
10.0V
21.4V
20.0V
10.8V
10.1V
21.6V
20.2V
10.9V
10.2V
21.8V
20.4V
At 0A, center-tap connected
At 40A, center-tap connected
At 0A, center-tap not connected
At 40A, center-tap not connected
Battery discharge current
60mA
60mA
In battery mode at no output current
Charging times:
The below listed charging time applies for a complete discharged battery until the DC-UPS indicated “Ready” with the green status LED.
In practice, the charging time can be much shorter, since the battery is usually not completely discharged.
Battery charging time
Max.
4h
For a 12Ah battery in 12Ah setting
Max.
9h
For a 26Ah battery in 26Ah setting
Max.
11h
For a 65Ah battery in 65Ah setting
Max.
25h
For a 150Ah battery in 150Ah setting
An extensive longer charging time is most likely caused by a defective or outdated battery.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
10/34
7. BUFFER TIME
Buffering will start immediately without interruption after the input voltage falls below typically 22.2V. Buffering is possible even if the
batteries are not fully charged.
Buffering can not be started without having previously reached typically 23.0V.
The buffer time (sometimes also called autonomy time) is the maximum period of time for which the battery can maintain the required
output current. The buffer time mainly depends on the capacity and quality of the battery and the output current in battery mode.
Too many buffering events in too short of a time can lead to a 5 second lock for further buffering requests. For example, if there are
multiple 0.2s buffer requests over a duration of 3.3s or multiple 0.3s buffer requests over a duration of 9.2s or multiple 0.4s buffer
requests over a duration of 14s, further buffering requests can be blocked for 5 seconds. Multiple buffer events longer than 0.5s do not
lead to such a 5s lock for further buffering events.
The following times are typical values for a new product in combination with PULS battery modules or with batteries recommended
from PULS. Due to long-term aging effects of batteries consider a buffer time reduction of 30-50% over time. The values apply for a
battery temperature between 20°C and 30°C.
The buffer times are defined for fully charged batteries and can be 10-20% shorter for buffer events, which start immediately after the
“Ready” signal becomes active.
The buffer times apply for a wiring with a wire length of 2x0.5m (equal 0.5m cord length) and a cross section of 6mm2(or AWG 10)
between the battery module and the DC-UPS.
Battery size
12Ah
(UZK24.122)
26Ah
(UZK24.262)
38Ah
Buffer time
Typ.
13 days
30 days
43 days
At 0A load
Typ.
1d : 0h : 4m : 27s
2d : 5h : 14m : 27s
3d : 9h : 1m : 7s
At 0.5A load
Typ.
11h : 20m : 33s
1d : 1h : 27m : 47s
1d : 11h : 18m : 3s
At 1A load
Typ.
5h : 29m : 52s
12h : 9m : 10s
19h : 5m : 50s
At 2A load
Typ.
2h : 0m : 35s
4h : 44m : 43s
7h : 24m : 27s
At 5A load
Typ.
47m : 35s
2h : 17m : 27s
3h : 28m : 20s
At 10A load
Typ.
27m : 29s
1h : 21m : 7s
2h : 8m : 8s
At 15A load
Typ.
18m : 17s
55m : 46s
1h : 31m : 33s
At 20A load
Typ.
13m : 40s
40m : 52s
1h : 8m : 27s
At 25A load
Typ.
10m : 47s
31m : 34s
53m : 58s
At 30A load
Typ.
8m : 49s
25m : 17s
44m : 9s
At 35A load
Typ.
7m : 25s
21m : 1s
36m : 21s
At 40A load
Typ.
-
15m : 12s
26m : 53s
At 50A load
Battery size
65Ah
100Ah
200Ah
Buffer time
Typ.
77 days
115 days
240 days
At 0A load
Typ.
6d : 1h : 50m : 0s
9d : 3h : 54m : 27s
19d : 16h : 13m : 20s
At 0.5A load
Typ.
2d : 23h : 45m : 33s
4d : 12h : 13m : 3s
9d : 18h : 22m : 30s
At 1A load
Typ.
1d : 9h : 13m : 35s
2d : 5h : 14m : 27s
4d : 20h : 19m : 10s
At 2A load
Typ.
13h : 53m : 20s
20h : 50m : 0s
1d : 21h : 50m : 0s
At 5A load
Typ.
6h : 49m : 43s
10h : 7m : 38s
22h : 27m : 13s
At 10A load
Typ.
4h : 23m : 53s
6h : 33m : 31s
14h : 44m : 16s
At 15A load
Typ.
3h : 4m : 30s
4h : 48m : 12s
10h : 52m : 47s
At 20A load
Typ.
2h : 17m : 58s
3h : 40m : 26s
8h : 33m : 53s
At 25A load
Typ.
1h : 48m : 47s
2h : 53m : 49s
7h : 1m : 18s
At 30A load
Typ.
1h : 28m : 59s
2h : 22m : 11s
5h : 51m : 22s
At 35A load
Typ.
1h : 14m : 45s
1h : 59m : 28s
4h : 55m : 15s
At 40A load
Typ.
55m : 53s
1h : 29m : 18s
3h : 24m : 3s
At 50A load

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
11/34
Fig. 7-1 Buffer time curves, typ.
Buffer Time
25A
30A
35A
40A
45A
50A
15A
20A
10A
5A
0A
Buffer Current
40 80200160 180120100 220200 Minutes
B
511417 211513
Hours719
A
60 140 240 9
Batteries:
A... 12Ah
B... 26Ah
C... 38Ah
D... 65Ah
E... 100Ah
F... 200Ah
F
E
D
C
206 8 10 12 14 16 18
Batteries:
A... 12Ah
B... 26Ah
C... 38Ah
D... 65Ah
E... 100Ah
F... 200Ah
A
B
E
D
C
F

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
12/34
8. INHIBIT-INPUT
The inhibit-input is a feature to disable the battery mode on purpose. This can be the case when buffering should actively be stopped in
order to save battery capacity and to have shorter recharging time.
The inhibit-input can also be used in case of a service event, where the application must be turned off.
Buffering can be inhibited or stopped:
- When a static voltage is applied to the inhibit-input terminals, there will be no buffering after the
input voltage is switched off.
- When, during the battery mode, a short voltage pulse with a minimum length of 250ms is applied to
the inhibit-input terminals, the output will switch off and stay off until the input voltage recovers.
Batteries will still be charged when the inhibit mode is activated or a voltage is applied to the inhibit-
input terminals.
Signal voltage
Max.
35Vdc
Signal current
Max.
6mA, current limited
Inhibit threshold
Min.
Max.
6Vdc, buffering is disabled above this threshold level
10Vdc
Isolation voltage
See chapter “Dielectric Strength”
Fig. 8-1 Wiring example for inhibit-input
Fig. 8-2 Activating the inhibit-input
+ +
- -
Power
Supply
DC24V,40A
Output
ACInput
L N PE
UB40
DC-UPS
IN OUT
+ +
-
-
Inhibit
+ -
BAT
+
-
+
-
UZK24
Battery
Module
Load
+ -
Input
Output
Inhibit
Input
Output
Inhibit
250ms
BatteryMode
Case
A
Input
Output
Inhibit
Case
B
BatteryMode
Inhibit not activated !
Case
C
7 +
5.1V
3mA
Inhibit
8 -

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
13/34
9. SIGNAL OUTPUTS
Please note:
If the buffering is terminated due to the deep discharge protection or due to the buffer time limiter, the last signal state is stored and
displayed for another 15 minutes.
Ready contact
The ready contact is closed when both batteries are charged more than typical 85%, no wiring failure is detected, input voltage is
sufficient and inhibit signal is not active.
The device can switch to battery mode regardless of whether the ready status is reached or not.
The contact opens at a too high battery or DC-UPS temperatures.
After the unit has been switched on with fully charged batteries, it may take 20s or more before the contact switches from charging to
ready.
Please note: After a short buffer event, the opening of the contact is suppressed for 5 minutes. This is to avoid a wrong signaling after it
can be assumed that the short buffer event has taken only little energy from the battery. If the battery has really been deeply
discharged after a short buffer event, a signal is only given after 5 minutes.
Contact ratings
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
Isolation voltage
See chapter “Dielectric Strength”
Buffering contact
The buffering contact is closed when unit is in battery mode.
Contact ratings
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
Isolation voltage
See chapter “Dielectric Strength”
Battery-low pre-warning contact
The battery-low pre-warning contact closes shortly before the battery is discharged.
Contact ratings
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
Isolation voltage
See chapter “Dielectric Strength”
Replace Battery Relay Contact
The contact is closed when one of the battery qualities tests of at least one battery reports a negative result.
To reset the “replace battery” signal, cycle the input power. The battery that has failed is indicated by the green LED which is off. The
battery should be replaced as soon as possible.
Contact ratings
Maximal 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A, resistive load
Minimal permissible load: 1mA at 5Vdc
Isolation voltage
See chapter “Dielectric Strength”

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
14/34
10.EFFICIENCY AND POWER LOSSES
Efficiency
Typ.
99.3%
Power supply mode, 40A output current, batteries fully charged
Power losses
Typ.
1.7W
Power supply mode, 0A output current, batteries fully charged
Typ.
2.7W
Power supply mode, 0A output current, batteries fully charged, center
tap connected
Typ.
3.5W
Power supply mode, 0A output current, 3A charging current
Typ.
5.5W
Power supply mode, 0A output current, 3A charging current, center tap
connected
Typ.
6.0W
Power supply mode, 0A output current, 6A charging current
Typ.
8.7W
Power supply mode, 0A output current, 6A charging current, center tap
connected
Typ.
6.0W
Power supply mode, 40A output current, batteries fully charged
Typ.
7.1W
Power supply mode, 40A output current, batteries fully charged, center
tap connected
Typ.
1.5W
Battery mode, 0A output current
Typ.
3.6W
Battery mode, 20A output current
Typ.
9.9W
Battery mode, 40A output current
11.FUNCTIONAL DIAGRAM
Fig. 11-1 Functional diagram
-
+
-
+
Battery
Switch
Battery
Tester 1
+
-
Input Output
24V
Battery
DiagnosisLED
StatusLEDBatt 1
Inhibit Input +
Controller
Error LED
ReplaceBattery
BufferingContact
ReadyContact
Buffer-timeLimiter
BatterySizeSelector
(7)
Inhibit Input -
(8)
(1)
(2)
(3)
(4)
(5)
(6)
ReturnCurrent
Protection
BatteryCharger
BatteryBalancer
Battery
Tester 2
Current
Measurement
StatusLEDBatt 2
(11)
(12)
Temp.
Sensor
(13)
Center
Tap
24V
Battery
Return
Current
Protection
BatteryLow
Warning
(14)
(15)

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
15/34
12.FRONT SIDE AND USER ELEMENTS
Fig. 12-1 Front side
A Output Terminal
+ →Positive output
- →Negative output
B Input Terminal
+ →Positive input
-→Negative input
C Battery Terminal
+→Terminal for positive battery connection
-→Terminal for positive battery connection
D Battery Monitoring Connector
Connection for temperature sensor for battery temperature and “Center-Tap” connection
(middle point of the two batteries).
E Signal Connector
For details see chapter “Signal Outputs” and “Inhibit-input”
The 8-pole plug connector and the 2-pole push-in terminal comprise the replace battery, ready,
buffering and battery low pre-warning relay contacts..
The 8-pole plug connector also comprises the inhibit signal input.
F Red Error LED
For details see figure “Flashing pattern for red Error LED”
This LED indicates that charging or buffering is not possible. The flashing pattern reports check
wiring, battery fusses, too high/low voltage or too high/low temperatures.
G Yellow Diagnosis LED
For details see figure “Flashing pattern for yellow diagnoses LED”
This LED helps troubleshooting and the flashing pattern indicates output overloaded (current),
battery replacement required, expired buffer time due to buffer time selector or discharged
battery or activated inhibit-input.
H Green Status LED
For details see figure “Flashing pattern for green Status LED”
Each battery has its own status LED. Battery 1 represents the battery, which is electrically closer
to the (+) pole and battery 2, which is closer to the (-) pole. The flashing pattern of this LED
reports ready, charging or buffering.
I Battery Size Selector
For details see chapter “Batteries and Battery Charging”
Six positions to select battery sizes to optimize the charging process, the battery quality tests and
protection features. Factory setting is 12Ah.
J Buffer Time Limiter
Six positions to limits the maximum buffer time in a buffer event to save battery energy.
Selectable between 10s 30s, 60s, 3 minutes and 10 minutes. If no limitation is selected (infinite
period of time), the buffering will be ended by the deep discharge protection. Factory set:
infinite.
K Chassis Ground
Use a M4 ring-type terminal to connect the housing to ground, when required.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
16/34
Fig. 12-2
Flashing pattern for green “Status LED”
Each battery has its own status LED. The signals are the same for both
batteries. (Listed in order of priorities)
Replace Battery, Battery or DC-UPS temperature too hot:
The LEDs are off when replace battery signal is active or the temperature of
the DC-UPS or battery is too hot.
Ready:
The LEDs are on solid when the battery is charged (> 85%), no wiring failure
is recognized, input voltage is sufficient.
After the unit is turned-on with charged batteries, it can take 20s or longer
that the signal switches from charging to ready.
Charging:
The LEDs are flashing with a low frequency when the batteries are
charging, and the state-of-charge is below 85%.
Buffering:
The LEDs are flashing with a high frequency when the unit is in battery
mode.
1
0Ready
1
0Charging
1
0Buffering
5
Hz
1
0ReplaceBat.,
Temp.
Fig. 12-3
Flashing pattern for yellow “Diagnoses LED”
This LED helps troubleshooting. (Listed in order of priorities)
Overload:
The LED is on solid when the input or battery current is permanently above
40A in battery or power supply mode.
Buffer time expired:
The LED is double flashing when the output has switched off due to the
setting of the buffer-time limiter or discharged battery. This signal will be
displayed for 15 minutes after the output has switched off.
Replace Battery:
The LED is flashing with a low frequency when one battery has failed the
periodically performed battery quality test. In case the centre-tap
connection is present, the battery that has failed is indicated by the green
LED which is off. Otherwise, both LEDs are off. The battery should be
replaced as soon as possible.
Inhibit active:
The LED is flashing with a high frequency when buffering is disabled due to
an active inhibit signal.
1
0Overload
1
0Replace
Battery
1
0Buffertime
expired
1
0Inhibit
active
5
Hz
Fig. 12-4
Flashing pattern for red “Error LED”
This LED indicates that charging or buffering is not possible. (Listed in order
of priorities)
Check Wiring:
The LED is on solid when a failure in the wiring, battery or battery fuse is
identified.
Input Voltage:
A single flash indicates that the input voltage is above 30V or the battery
voltage was below 23V before a buffer request.
Temperature:
A double flash indicates that the temperature of the DC-UPS is too high
(above 70°C) or that the temperature of the battery is too high (above
50°C) or too low (below -15°C). Battery temperatures indications require a
connected battery temperature sensor.
1
0Check
Wiring
1
0Input
Voltage
1
0Temp.

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
17/34
13.CONNECTION TERMINALS
The terminals are IP20 finger safe constructed and suitable for field and factory wiring.
Input, output and battery
terminals
Signal terminals (except
battery-low pre-warning)
Battery-low pre-warning
terminals
Type
Screw terminals
Pluggable screw
terminals
Push-in termination
Solid wire
Max. 16mm2
Max. 1.5mm2
Max. 1.5mm2
Stranded wire
Max. 10mm2
Max. 1.5mm2
Max. 1.5mm2
American Wire Gauge
AWG 22-8
AWG 22-14
AWG 24-16
Max. wire diameter (including ferrules)
5.2mm
1.5mm
1.6mm
Wire stripping length
12mm / 0.5inch
6mm / 0.25inch
7mm / 0.28inch
Tightening torque
2.3Nm / 20lb.inch
0.4Nm / 3.5lb.inch
-
Screwdriver
Slotted 6.5mm, Philips No
2
Slotted 3mm
Slotted 3mm to open the
spring

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
18/34
14.LIFETIME EXPECTANCY
The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and 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
capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of up to 15 years
(131 400h). Any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices.
Lifetime expectancy
457 000h
Power supply mode, 20A and 40°C, fully charged
1 370 000h
Power supply mode, 20A and 25°C, fully charged
322 000h
Power supply mode, 40A and 40°C, fully charged
842 000h
Power supply mode, 40A and 25°C, fully charged
15.MTBF
MTBF stands for Mean Time Between Failure, which 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.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means that
statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not be determined if the failed unit
has been running for 50 000h or only for 100h.
For these types of units, the MTTF (Mean Time To Failure) value is the same value as the MTBF value.
MTBF SN 29500, IEC 61709
T.B.D.
Power supply mode, 40A and 40°C
T.B.D.
Power supply mode, 40A and 25°C
MTBF MIL HDBK 217F
T.B.D.
Power supply mode, 40A and 40°C; Ground Benign GB40
T.B.D.
Power supply mode, 40A and 25°C; Ground Benign GB25
T.B.D.
Power supply mode, 40A and 40°C; Ground Fixed GF40
T.B.D.
Power supply mode, 40A and 25°C; Ground Fixed GF25

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
19/34
16.EMC
The EMC behavior of the device is designed for applications in industrial environment as well as in residential, commercial and light
industry environment without any restrictions.
The device complies with EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4, EN 61000-3-2 and EN 61000-3-3.
The device complies with FCC Part 15 rules. Operation is subjected to following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
All tests are performed in power supply and battery mode.
The chassis of the device is earthed through the DIN-rail mounting connection to a grounded metal plate.
EMC Immunity
Power lines and housing
Electrostatic discharge
EN 61000-4-2
Contact discharge
Air discharge
8kV
15kV
Criterion A
Criterion A
Electromagnetic RF field
EN 61000-4-3
80MHz –2.7GHz
20V/m
Criterion A
Fast transients (Burst)
EN 61000-4-4
Input lines
Output lines
2kV
2kV
Criterion A
Criterion A
Surge voltage on input lines
EN 61000-4-5
+ →-
+ / - →Chassis ground
1kV with 40 Ohms or
0.5kV, 2 Ohms
1kV
Criterion A
Criterion A
Surge voltage on output lines
EN 61000-4-5
+ →-
+ / - →Chassis ground
1kV with 40 Ohms
1kV
Criterion A
Criterion A
Surge voltage on battery and
center-tap (CT)
EN 61000-4-5
+ →-
+ / - / CT →chassis ground
N/A (wire length)
1kV
-
Criterion A
Conducted disturbance
EN 61000-4-6
0.15-80MHz
10V
Criterion A
EMC Immunity
Signals
Fast transients (Burst)
EN 61000-4-4
With coupling clamp
2kV
Criterion A
Surge voltage
EN 61000-4-5
Signal →chassis ground
1kV
Criterion A
Criterions:
A: The device shows normal operation behavior within the defined limits.
EMC Emission
Conducted emission
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
Input lines
Limits for local DC power
networks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
Output lines
Limits for local DC power
networks fulfilled.
IEC/CISPR 16-1-2, IEC/CISPR 16-2-1
Battery lines
N/A (wire length)
Radiated emission
EN 55011, EN 55032, CISPR 11, CISPR 32
Class B
Switching Frequencies
Battery charger
110kHz and 220kHz
Two fixed frequencies, can occur at the same time
Battery balancer
100kHz
Fixed frequency
Auxiliary converter
40 to 80kHz
Input voltage dependent
Microcontroller
24 MHz
Fixed frequency

UB40.241
UB-Series
24V, 40A, DC-UPS
Jun. 2020 / Rev.0.1 DS-UB40.241-EN All values are typical figures specified at 24Vdc input voltage, 40A output current in
power supply mode at 25°C ambient, no charging and after a 5 minutes run-in time unless otherwise noted.
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20/34
17.ENVIRONMENT
Operational temperature
-25°C to +70°C (-13°F to 158°F)
Operational temperature is the same as the ambient or
surrounding temperature and is defined as the air
temperature 2cm below the unit.
Storage temperature
-40°C to +85°C (-40°F to 185°F)
For storage and transportation
Output de-rating
1A/°C
2.5A/1000m or 5°C/1000m
Between +50°C and +70°C (122 - 158°F), see Fig. 17-1
For altitudes above 2000m (6560ft), see Fig. 17-2
The de-rating is not hardware controlled. The user has to take this into consideration to stay below
the de-rated current limits in order not to overload the unit.
Humidity
5 to 95% r.h.
According to IEC 60068-2-30
Atmospheric pressure
110-54kPa
See Fig. 17-2 for details
Altitude
Up to 5000m (16 400ft)
See Fig. 17-2 for details
Overvoltage category
N/A
Impulse withstand voltages
1.5kV
Between input and chassis (according to IEC 60664-1 over-
voltage category II)
Degree of pollution
2
According to IEC 60664-1, not conductive
Vibration sinusoidal
2-17.8Hz: ±1.6mm;
17.8-500Hz: 2g
2 hours / axis
According to IEC 60068-2-6
Shock
30g 6ms, 20g 11ms
3 bumps per direction, 18 bumps in
total
According to IEC 60068-2-27
Shock and vibration are tested in combination with DIN-Rails according to EN 60715 with a height of
15mm and a thickness of 1.3mm.
Fig. 17-1 Output current vs. ambient temp.
Fig. 17-2 Output current vs. altitude
Allowed Output Current
0-25 0 50 70°C
30A
40A
60A
60
A
Ambient Temperature
A... continuous
B... short term (5s)
B
50A
2000m 5000m
40A
60A
Altitude
Allowed Output Current
A... Tamb < 40°C
B... Tamb < 50°C
C... Tamb < 60°C
D... Short term (5s)
C
AP*) 80kPa 54kPa110kPa
0m
*) Atmospheric pressure
short term (5s)
continuous
4000m
62kPa
50A
B
32.5A
A
continuous
D