Related Manuals for BEL LDX-U20
Summary of Contents for BEL LDX-U20
- Page 1 USER MANUAL LDX-U20 12/24 V 20 A High Performance DC-UPS belfuse.com/power-solutions...
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Page 2: Table Of Contents
USER MANUAL CONTENTS System description Features and benefits Functional description Remote monitoring and controlling 3.1.1 3.1.2 Digital input 3.1.3 Dry contact outputs Backup PC shutdown and automatic restart Battery health monitor Battery resistance measurement Battery charger Coulomb counter Cold start Installation Connecting the input to the power supply Connecting the load... - Page 3 Battery installation date 5.3.7 Battery operating time Logs Wizard 21 Events and Alarms Physical dimensions Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001...
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Page 4: System Description
12V and 28V. The LDX-U20 monitors the voltage coming from a DC power supply and in case of power failure a backup battery is connected to the load. In normal condition the battery is kept charged by an integrated battery charger supporting various battery chemistries such Lead-Acid, NiMH, NiCd and Lithium. -
Page 5: Features And Benefits
Same functionalities of the embedded user interface with the ease of the PC benefits. Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001... -
Page 6: Functional Description
An opto-isolated input allows the inhibition of the backup function. The polarity of the input can be defined using the Inhibit polarity setting (see §5.2.15). 3.1.3 DRY CONTACT OUTPUTS 2 relays are present on the LDX-U20. User can chose which event activates the relay and the polarity. The list of events is the following: NAME DESCRIPTION DEFAULT SETTING Backup Active when the system is running on the batteries. -
Page 7: Backup
Operating System (OS) crash. The user may adjust an output current threshold and a timer used for detecting the PC OFF status. In order to restart the PC the LDX-U20 toggles the output OFF and then ON again. User must enable in the PC BIOS the automatic start in case of supply ON. - Page 8 Table 2. Shutdown and restart The parameters are settable through the LDX-U20 LCD or using the POWERMASTER application. The checkbox “Run on startup” must be checked on POWERMASTER when PC shutdown function is used, select “Start in tray” to start in minimized into the windows system tray.
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Page 9: Battery Health Monitor
The injected AC current I(AC) is flowing also through the cables + connectors resistance - “Rcables”. Figure 7. Internal resistance measurement Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001... -
Page 10: Battery Charger
Without using the battery sense connection as shown in Figure 9 the AC voltage drop is measured across the battery connection terminals on the LDX-U20. The measured resistance will be in this case: Rmeasured=Ri+Rcables. When high Ah batteries and / or small and long cables are used Rcables can be > Ri. Anyhow a connection problem as for example a loose contact can be detected by this measurement method. -
Page 11: Coulomb Counter
For nickel batteries the use of the external temperature sensor is mandatory. The sensor must be placed in contact with the battery. 3.7 COULOMB COUNTER LDX-U20 measures the current flowing from/to the battery to keep track of the capacity available on the battery. The capacity is measured in Ampère Hours [Ah]. The value shown is based on the following assumptions: •... -
Page 12: Installation
4.1 CONNECTING THE INPUT TO THE POWER SUPPLY The LDX-U20 must be connected to a DC power supply rated between 12VDC and 28VDC with a maximum output current of 20A. Use only 60/75 Class I copper 1.5…2.5mm2 wires stripped 6...7.5mm. The tightening torque must be 0.5…0.6Nm. -
Page 13: Dry Contacts
12 V / 24 V 20 A High Performance DC-UPS 4.6 DRY CONTACTS 2 relays’ dry contacts are provided on the LDX-U20. Connect the 2 relays dry contact using 60/75 Class I copper 0.15…0.5mm2 wires stripped 7...8mm. The connector is provided with spring terminals. -
Page 14: User Interface
USER MANUAL 5 USER INTERFACE Power ON screen: This screen is shown at power ON. It shows the device name, serial number and firmware version. Status: This is the default view where the user can find the most relevant information about the device status. The system always falls back to this view after 60s of inactivity (no key pressed). -
Page 15: Status
Furthermore in case of problem a full screen alarm message appears on the screen after 1min of inactivity (no key pressed). The message can be removed pressing the MENU KEY. Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001... -
Page 16: Settings
USER MANUAL 5.2 SETTINGS The setting menu contains all the configurable parameters available to the user. Use the UP/DOWN KEY to navigate through the menu items. Press the OK KEY to enter and exit the editing mode, while in editing mode use the UP/DOWN KEY to change the selected value. 5.2.1 INPUT NOMINAL VOLTAGE Used to set the nominal input voltage on the input connector. -
Page 17: Battery Deep Discharge Voltage
Used to set the expected battery lifetime. Once the battery operating time exceeds the set value an alarm is generated. Default: 100kh Range: 1kh … 200kh Resolution: 1kh Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001... -
Page 18: Maximum Backup Time
USER MANUAL 5.2.14 MAXIMUM BACKUP TIME Used to set the maximum time the system stays in backup before switching OFF. If disabled the system stays in backup until the battery reaches the deep discharge voltage. Default: 2h Range: 10s … 2h, No timeout Resolution: 1s 5.2.15 INHIBIT POLARITY Used to select the polarity of the INHIBIT input. -
Page 19: Time
Timer user for PC OFF detection, see §3.3 for details. Default: 1s Range: 1s … 60s Resolution: 1s Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 © 2017 Bel Power Solutions & Protection BCG.00946_001... -
Page 20: Relay 1 (Ready)
USER MANUAL 5.2.28 RELAY 1 (READY) Used to configure the behavior of the Relay 1 contact. Click OK and then follow the instruction on the screen to define the polarity and event associated with the relay. See §3.1.3 for more details. 5.2.29 RELAY 2 (BACKUP) Used to configure the behavior of the Relay 2 contact. - Page 21 Value: The value may be empty. See §6 for the detailed description of this field for each event. 5.5 WIZARD The wizard assists the user during the LDX-U20 configuration. The wizard should be run once at commissioning and every time the battery is replaced. The wizard shows the following screens:...
- Page 22 Power ON cycles count. Description Triggered at device power ON. NAME SHORT NAME VALUE EVENT_POWER_OFF Power OFF None. Description Triggered when LDX-U20 powers OFF. NAME SHORT NAME VALUE EVENT_BATTERY_CHARGING Charging None. Description Triggered when the LDX-U20 starts charging the battery. tech.support@psbel.com belfuse.com/power-solutions...
- Page 23 12 V / 24 V 20 A High Performance DC-UPS NAME SHORT NAME VALUE EVENT_BATTERY_CHARGED Charged None. Description Triggered when the LDX-U20 finishes charging the battery. The battery is fully charged. NAME SHORT NAME VALUE EVENT_BATTERY_DISCHARGING Discharging None. Description Triggered when the LDX-U20 enters the backup mode.
- Page 24 USER MANUAL NAME SHORT NAME VALUE ALARM_OUTPUT_OVERLOAD_START OOLS Threshold current triggering the alarm. Description The measured output current exceeds the alarm threshold. The alarm threshold is set to 22A. NAME SHORT NAME VALUE The maximum output current reached during the ALARM_OUTPUT_OVERLOAD_END OOLE alarm.
- Page 25 A short circuit has been detected on the output. NAME SHORT NAME VALUE ALARM_BATTERY_ERROR Batt. error None. Description The LDX-U20 was unable to charge the battery correctly. PHYSICAL DIMENSIONS Asia-Pacific Europe, Middle East North America +86 755 298 85888 +353 61 225 977 +1 408 785 5200 ©...