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Angst+Pfister nextys DCU20 User Manual

12/24v 20a high performance dc
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DCU20_1680-21539-0006-E-1117
DCU20
12/24V 20A High Performance DC-UPS
User Manual
POWERMASTER
DCU20 User Manual rev. 19
Page 1/29

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Summary of Contents for Angst+Pfister nextys DCU20

  • Page 1 DCU20_1680-21539-0006-E-1117 DCU20 12/24V 20A High Performance DC-UPS User Manual POWERMASTER DCU20 User Manual rev. 19 Page 1/29...
  • Page 2 DCU20_1680-21539-0006-E-1117 DISCLAIMER NEXTYS NEXTYS reserves the right to make changes without further notice to any products herein. makes no warranty, representation or guarantee regarding the suitability of its products for any NEXTYS particular purpose, nor does assume any liability arising out of the application or use of any product, and specifically disclaims any and all liability, including without limitation consequential or NEXTYS incidental damages.

  • Page 3: Table Of Contents

    DCU20_1680-21539-0006-E-1117 TABLE OF CONTENTS System description ............................5 Features and benefits ............................6 Functional description ............................7 Remote monitoring and controlling ......................7 3.1.1 USB ..............................7 3.1.2 Digital input............................7 3.1.3 Dry contact outputs ..........................7 Backup ................................ 8 PC shutdown and automatic restart ......................
  • Page 4 DCU20_1680-21539-0006-E-1117 5.3.4 Power ON cycles counter ........................22 5.3.5 Operating time ............................ 22 5.3.6 Battery installation date ........................23 5.3.7 Battery operating time ........................23 Logs ................................23 Wizard ............................... 23 Events and Alarms ............................24 DCU20 User Manual rev. 19 Page 4/29...

  • Page 5: System Description

    DCU20_1680-21539-0006-E-1117 1 System description Use latest device Documentation, Software and Firmware to ensure reliable operation of the system (downloadable from www.nextys.com). The DCU20 is a microprocessor controlled DC UPS rated 20A (rating of the power supply connectable to the input) usable in systems with a nominal voltage between 12V and 28V. The DCU20 monitors the voltage coming from a DC power supply and in case of power failure a backup battery is connected to the load.

  • Page 6: Features And Benefits

    DCU20_1680-21539-0006-E-1117 2 Features and benefits The main features are:  Integrated battery charger for multi-chemistry batteries with charging current up to 5A.  Automatic sensing of input voltage, load current and battery current.  Protections against battery reverse polarity connection and over current when operating from the battery.

  • Page 7: Functional Description

    DCU20_1680-21539-0006-E-1117 3 Functional description A simplified block diagram of the DCU20 is shown in Figure 2. 5A Battery TH R C harger Buz z er Thermal U SB D is play U SB R EAD Y Buttons R elay s BATT BAC KU P Microprocessor...

  • Page 8: Backup

    DCU20_1680-21539-0006-E-1117 Name Description Default setting Backup Active when the system is running on the Relay 2 batteries. SoC < 25% (Low Battery) Active when the State of Charge (SoC) of the Unused battery is below 25%. Battery life time expired Active when the battery life time counter is Relay 1 exceeding the value specified on §5.2.13...
  • Page 9 DCU20_1680-21539-0006-E-1117 In case the load (PC) current exceeds the DCU20 dry contact rating the use of an external relay with suitable current/voltage rating is needed, relay coil voltage shall match output voltage. It should be driven by the DCU20 internal dry contact. OUTPUT+ Fuse 5x20 4A Fast...

  • Page 10: Battery Health Monitor

    DCU20_1680-21539-0006-E-1117 lower than Ioff current threshold for T4 time. As a consequence DCU20 generates an ON->OFF->ON cycle on its output. PC shutdown delay User settable (§5.2.23). Time between start of backup and start of PC shutdown procedure. PC shutdown time User settable (§5.2.24).

  • Page 11: Battery Resistance Measurement

    DCU20_1680-21539-0006-E-1117  Temperature (T) measurement: The battery temperature is monitored through an optional temperature sensor (P/N: WNTC-2MT). The battery charger takes into account the battery temperature and provides a temperature compensated charging voltage. In case of over temperature the system disconnects the battery to prevent damage. ...

  • Page 12: Coulomb Counter

    DCU20_1680-21539-0006-E-1117  Battery capacity: between 1.2Ah and 150Ah (see §5.2.4).  Battery charging voltage: provided by the battery manufacturer (see §5.2.5).  Battery charging current: provided by the battery manufacturer (see §5.2.6).  Battery deep discharge voltage (see §5.2.7). The battery charger automatically reduces the current to avoid exceeding the maximum input current (20A) in case of high current load.

  • Page 13: Cold Start

    DCU20_1680-21539-0006-E-1117  The value shown is just informative and does not represent the real state of charge of the battery in some circumstances, for example if the battery is damaged.  When the battery is connected for the first time or the system starts from OFF, the system assumes the battery is fully discharged and start with 0Ah counter.

  • Page 14: Installation

    DCU20_1680-21539-0006-E-1117 4 Installation Warning: In order to avoid potentially hazardous situations including fire hazard, safety recommendations must be followed. Only authorized staff can install the unit. 4.1 Connecting the input to the power supply The DCU20 must be connected to a DC power supply rated between 12VDC and 28VDC with a maximum output current of 20A.

  • Page 15: Connecting The Inhibit Input

    DCU20_1680-21539-0006-E-1117 4.5 Connecting the INHIBIT input An opto-isolated digital input is provided. A digital signal between 5VDC and 30VDC must be applied to this input to enable the INHIBIT function. By default when the signal is 0V (or the INHIBIT input is not connected) the unit will switch the load to the battery as soon as the input voltage is no more present.

  • Page 16: User Interface

    DCU20_1680-21539-0006-E-1117 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 17: Status

    DCU20_1680-21539-0006-E-1117 Symbol Name Function MENU KEY Scrolls between menus. DOWN KEY Scrolls down menus and values. UP KEY Scrolls up menus and values. OK KEY Confirms selection. Table 4: User interface keys The GUI is composed of 5 main menus which are selectable using the MENU KEY as shown on Table 3.

  • Page 18: Input Nominal Voltage

    DCU20_1680-21539-0006-E-1117 5.2.1 Input nominal voltage Used to set the nominal input voltage on the input connector. Used to generate the input under voltage and over voltage alarm. See §6 for more details. Default: 24V Range: 11V … 28V Resolution: 0.1V 5.2.2 Battery chemistry Used to set the chemistry of the battery.

  • Page 19: Battery Low Voltage

    DCU20_1680-21539-0006-E-1117 5.2.8 Battery low voltage An alarm is generated if during discharge the battery voltage drops below this threshold. Default: 18V Range: battery deep discharge voltage … 28V Resolution: 0.1V 5.2.9 Battery nominal internal resistance Used to set the nominal battery internal resistance of the battery. When set to automatic the system will record the next valid measurement as the nominal value.

  • Page 20: Maximum Backup Time

    DCU20_1680-21539-0006-E-1117 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 21: Time

    DCU20_1680-21539-0006-E-1117 5.2.21 Time Used to show and set the current RTC time. The RTC is used to time stamp the event logs. 5.2.22 PC shutdown enable Enables the PC shutdown function as explained in §3.3. Default: Disabled Choices: Enabled, Disabled 5.2.23 PC shutdown delay Delay between start of backup and PC shutdown command sent by POWERMASTER, see §3.3 for details.

  • Page 22: Relay 1 (Ready)

    DCU20_1680-21539-0006-E-1117 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 23: Battery Installation Date

    DCU20_1680-21539-0006-E-1117 5.3.6 Battery installation date Shows the battery installation date. This value can be edited pressing the OK KEY or using the wizard (see §5.5). It is used by the system to calculate the battery operating time. 5.3.7 Battery operating time Shows the current battery operating time.

  • Page 24: Events And Alarms

    DCU20_1680-21539-0006-E-1117 7) Insert the battery charge current 8) Insert the battery deep and click next to confirm. See discharge protection voltage §5.2.6 for more details. and click next to confirm. See §5.2.7 for more details. 9) Insert the battery nominal Insert battery internal resistance and click next...
  • Page 25 DCU20_1680-21539-0006-E-1117 Name Short name Value EVENT_BATTERY_DISCHARGING Discharging None. Description Triggered when the DCU20 enters the backup mode. Name Short name Value EVENT_INHIBIT_START Inhibit start None. Description Triggered when the inhibit input toggles from false to true. Name Short name Value EVENT_INHIBIT_END Inhibit end None.
  • Page 26 DCU20_1680-21539-0006-E-1117 Name Short name Value ALARM_INPUT_OVERLOAD_END IOLE maximum input current reached during the alarm. Description The measured input current returns below the alarm threshold. 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...
  • Page 27 DCU20_1680-21539-0006-E-1117 Name Short name Value ALARM_BATTERY_OVERVOLT_END BOVE The maximum battery voltage reached during the alarm. Description The measured battery voltage returns below the alarm threshold. Name Short name Value ALARM_BATTERY_OVERTEMP_START BOTS Threshold temperature triggering the alarm. Description The measured battery temperature exceeds the alarm threshold. The threshold is the battery maximum temperature (§5.2.11).
  • Page 28 DCU20_1680-21539-0006-E-1117 Name Short name Value ALARM_BATTERY_ERROR Batt. error None. Description The DCU20 was unable to charge the battery correctly. DCU20 User Manual rev. 19 Page 28/29...
  • Page 29 DCU20_1680-21539-0006-E-1117 Physical dimensions DCU20 User Manual rev. 19 Page 29/29...
  • Page 30 We are here for you. Addresses and Contacts. Headquarter Switzerland: Office Germany: Angst+Pfister Sensors and Power AG Angst+Pfister Sensors and Power Deutschland GmbH Thurgauerstrasse 66 Edisonstraße 16 CH-8050 Zurich D-85716 Unterschleißheim Phone +41 44 877 35 00 Phone +49 89 374 288 87 00 sensorsandpower@angst-pfister.com...

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