Bel LDX-U20 Multiple protection Datasheet

LDX-U20 is a microprocessor controlled DC-UPS rated 20 A usable in
12 V or 24 V systems.
LDX-U20 monitors the voltage supplied by a DC source and in case of
power failure a backup battery is connected to the load.
When powered externally the unit charges the battery by an integrated
battery charger supporting various battery chemistries.

Multiple protections

Integrated battery charger for 12 V or 24 V (or intermediate voltages)
multi-chemistry batteries with a charging current up to 5 A

20 A rated load

Automatic sensing of input voltage, load current and battery current

Battery protection against reverse polarity connection and overcurrent

Battery health monitoring system: measuring battery internal
resistance, battery temperature, charge/discharge cycles and Coulomb
counter

User settable maximum backup time

Remote input to inhibit the UPS function

Connection for a battery thermal sensor (optional)

Industrial machine control

4 keys and 1 color graphic CSTN LCD display

Allows online device configuration

Displays the LDX-U20 status and alarms

USB communication port for remote monitoring and configuration

Dry contacts

Connection through USB interface

Remote monitoring and configuration

Firmware upgrade

Same functionalities of the embedded user interface with the ease of
the PC benefits
LDX-U20
2
LDX-U20
11 - 28 VDC (10 - 29 VDC)
20 A
12 V or 24 V
5A
Input Voltage (Range)
Rated
11 - 28 VDC (10 - 29 VDC)
Input Current
Rated
20 A
No Load Power Consumption
<3W
Rated Battery Voltage
Other voltages possible by request
Battery Chemistries
Lead-Acid (charging voltage is temperature corrected
with 3 mV/K/cell)
Ni-MH / Ni-Cd
Li-ION / LiFePO4
12 V or 24 V
Maximum Battery Charge Current
5A
Allowed Battery Capacity
up to150 Ah
Maximum Battery Current
20 A (up to 35 A for 5 seconds)
Load to Battery Switch Time
Battery Protections
< 5 usec
Overcurrent
Deep discharge
Reverse polarity
Battery Health Monitor
1 - 300 mΩ
Battery Internal Resistance Range
Using Kelvin connection
Additional Monitoring Functions
Coulomb counter
Battery temperature through optional 10kΩ NTC sensor
Battery operating time since installation
Number of cycles
1.5 Inch Color Graphic LCD
Used to indicate the unit’s status and to access the configuration menus
4 Keys
Used to program the unit and to access various menus
Red LED
ON: generic failure on the system, details on the LCD
Blinking: battery backup function active
2 Dry Contacts (Relays) Rated 30 V / 1 A User settable between different functions (see user manual)
USB Interface
Mini USB connector used to interface the unit with a PC
[email protected]
LDX-U20
3
Efficiency
Power Loss at Full Load (On Power Supply)
Efficiency
Power Loss at Full Load(On Battery)
Battery Charger Efficiency
Power Loss
Maximum Backup Time
Operating Ambient Temperature
> 97.5%
< 13 W
> 96.5%
< 18 W
> 90%
< 16 W
User programmable or up to battery discharge
threshold
Start-up type tested:- 40°C;
For temperatures <-20°C the LCD is not operating, -40°C to +60°C
but the unit will operate correctly.
Storage Temperature
-20°C to +60°C
Humidity
Non-condensing
5 - 95% r.H.
Life Time Expectation
at 25°C ambient full load
253142 h (28.9 years)
Isolation Against Enclosure
0.75 kVDC
Cooling Method
Natural convection cooling
Safety Standards & Approvals
Emission
EMC Standards
Immunity
Protection Degree
UL508 (reference)
EN60950 (reference)
EN55022: 2010 (CISPR22)
EN55011: 2009 /A1:2010
EN61000-4-2:2008
EN61000-4-3:2006 /A2:2010
EN61000-4-4:2012
EN61000-4-5:2014
EN61000-4-11:2004 /A1:2010
Class A
Class A
Level 3
Level 3
Level 3
Level 1
Level 2
EN60529:1989 / A:2013
Vibration Sinusoidal
IEC 60068-2-6:2007
Shock
IEC 60068-2-27:2008
IP20
5-17.8 Hz: ±1.6 mm; 17.8-500 Hz:
2g 2 Hours / axis (X, Y, Z)
30 g 6 ms, 20 g 11 ms;
3 bumps / direction, 18 bumps total
NOTES:

For more details, performance and description regarding all parameters not indicated in the above table; please refer to user
manual. Technical parameters are typical, measured in laboratory environment at 25°C, 24 V input and 24 V lead acid battery.

Power rating, losses, efficiency, ripple, thermal behaviour and start-up may change outside of the nominal rated input range.

Contact factory for details.

Data may change without prior notice in order to improve the product.
IN/Battery/OUT Connectors
2.5 mm², Pluggable screw type (24 – 12 AWG,) 6 pins pluggable, 5.08 mm pitch
Auxiliary Contacts Connectors
Up to 0.5 mm², Fast Pluggable type (20 AWG), 7 pins pluggable, 2.54 mm pitch
Temperature Sensor Connector
2 pins, 2 mm pitch, friction lock connector
USB Connector
Mini USB connector
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2016 Bel Power Solutions & Protection
BCD.00849_AA
Asia-Pacific
+86 755 298 85888
LDX-U20
4
INPUT / OUTPUT CONNECTION:

IN (+/-) = connect to DC (+/-) Power supply

OUT (+/-) = connect to DC (+/-) Load

BATTERY (+/-) = connect to Battery (+/-)

BATTERY SENSE (+/-) = connect to Battery (+/-) for better
accuracy of internal resistance measurement

INHIBIT (+/-) = used to inhibits the backup function

Backup = dry contact closed when LDX-U20 is running on
battery

Ready = programmable dry contact
Weight
500 g
Dimensions
54 x 115 x 110 mm
Mounting Rail
IEC 60715/H15/TH35-7.5(-15)
Figure 1. Mechanical Drawing
[email protected]
LDX-U20
5
Configuration and diagnostic tool:






Monitors the device status
Updates the firmware
Reads and writes the device configuration
Reads and writes the configuration from/to a file
Reads the logs
Exports / imports logs from / to a file
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
© 2016 Bel Power Solutions & Protection
BCD.00849_AA
Asia-Pacific
+86 755 298 85888
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