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Angst+Pfister nextys DCU20 User Manual Download Page 15

 

 
 
 

DCU20

 User Manual rev. 19 

Page 15/29 

 

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. Applying a signal to this input inhibits the backup function and the load can be switched OFF 
as  soon  at  the  input  fails  with  no  battery  backup.  The  polarity  of  this  input  can  be  changed  as 
explained in §5.2.15. 
 
 

4.6  Dry contacts 

2 relays

’ dry contacts are provided on the DCU20. Connect the 2 relays dry contact using 60/75 Class 

I copper 0.15…0.5mm

2

 wires stripped 7...8mm. The connector is provided with spring terminals. 

 

 
Note

: the 2 relays contacts have one pole in common. 

 
 

4.7  Battery sense connection 

Ri

+

-

Rcables

Battery

 

Figure 9: Battery connection without sense 

 

Ri

+

-

Rcables

Battery

 

Figure 10: Battery connection with sense 

 

 
The  battery  sense  connection  is  optional  and  it  is  recommended  to  use  it  to  have  an  accurate 
measurement of the battery internal resistance (see §3.5). 

 

Caution: please respect the polarity of the battery sense connection! 

15

DCU20_1680-21539-0006-E-1117

Summary of Contents for nextys DCU20

Page 1: ...DCU20 User Manual rev 19 Page 1 29 DCU20 12 24V 20A High Performance DC UPS User Manual POWERMASTER 1 DCU20_1680 21539 0006 E 1117...

Page 2: ...h the failure of the NEXTYS product could create a situation where personal injury or death may occur Should Buyer purchase or use NEXTYS products for any such unintended or unauthorized application B...

Page 3: ...Battery chemistry 18 5 2 3 Battery nominal voltage 18 5 2 4 Battery capacity 18 5 2 5 Battery charge voltage 18 5 2 6 Battery charge current 18 5 2 7 Battery deep discharge voltage 18 5 2 8 Battery l...

Page 4: ...ev 19 Page 4 29 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 5 4 Logs 23 5 5 Wizard 23 6 Events and Alarms 24 4 DCU20_168...

Page 5: ...toring See 3 1 for more details 5 Inhibit input A signal between 5VDC and 30VDC applied to this input inhibits the backup function this input is programmable to be active high or active low see 4 5 6...

Page 6: ...t to inhibit the UPS function Connection of a battery thermal sensor optional Integrated data logger with time stamp all events errors are logged in the internal memory and downloadable through the US...

Page 7: ...the microprocessor In case of a power outage the battery is connected to the load instantaneously through an active switch reducing the power loss to a minimum The product offers additional features t...

Page 8: ...ime avoiding discharging the battery when not needed During backup the internal Coulomb counter is used to give an estimation of the residual charge of the battery this information is given to the use...

Page 9: ...d Time PC OFF signal PC status Output voltage Output current Input voltage T1 T2 T3 T4 T3 E3 E1 E2 E4 Ioff Figure 5 Shutdown and restart chart Parameter Name Description E1 Backup Power failure on the...

Page 10: ...current threshold to trigger the automatic PC restart PC supply ON OFF ON cycle Ioff PC OFF detection current threshold User settable 5 2 26 Current threshold used to detect PC OFF status This value m...

Page 11: ...20 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 c...

Page 12: ...time The value is automatically calculated by the device For Nickel batteries only the following conditions are also checked Temperature Cutoff TCO The battery temperature if higher than the Battery...

Page 13: ...d to turn ON the UPS to operate during a power interruption or to determine if the UPS will not turn ON due to a bad input power This practice is also a method to see if the battery connected to the D...

Page 14: ...ity Please check the load and the power supply are rating compliant 4 3 Connecting the battery The DCU20 must be connected to a battery with nominal voltage between 12VDC and 28VDC with up to 150Ah ca...

Page 15: ...The polarity of this input can be changed as explained in 5 2 15 4 6 Dry contacts 2 relays dry contacts are provided on the DCU20 Connect the 2 relays dry contact using 60 75 Class I copper 0 15 0 5m...

Page 16: ...configurable from this menu Use the UP DOWN KEY to navigate through the parameters Press the OK KEY to enter exit the editing mode In editing mode use the UP DOWN KEY to change the highlighted value I...

Page 17: ...to red and a message with the cause appears Battery The battery voltage current temperature resistance and charge are shown in this section In case of problems with the battery the background color of...

Page 18: ...Used to set the nominal battery capacity of the battery The internal Coulomb counter uses this value to indicate the state of charge of the battery Default 2Ah Range 1 2Ah 150Ah Resolution 0 1Ah 5 2...

Page 19: ...2 11 Battery maximum temperature An optional external temperature sensor P N WNTC 2MT is required Used to set the maximum temperature at which the battery can operate safely If the measured temperatu...

Page 20: ...oices Low High 5 2 16 Screen contrast Used to set the LCD screen contrast Default 24 Range 0 40 Resolution 1 5 2 17 Screen backlight Used to set the LCD screen backlight Default 2 Range 1 10 Resolutio...

Page 21: ...me Delay between start of PC shutdown and output power OFF see 3 3 for details Default 0s Range 0s 10min Resolution 1s 5 2 25 PC restart minimum OFF time Minimum OFF time for PC restart see 3 3 for de...

Page 22: ...he menu items 5 3 1 Firmware version Shows the current firmware version Using the freely available POWERMASTER software is possible to upgrade the firmware with the latest available version 5 3 2 Seri...

Page 23: ...dentifying the event see 6 for the complete list of events 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 th...

Page 24: ...and click next to confirm See 5 3 6 for more details 12 The wizard is finished Click the OK KEY to start using the new values in the configuration or the MENU KEY to exit discarding the data and keep...

Page 25: ...put nominal voltage 5 2 1 and the battery nominal voltage 5 2 3 10 Name Short name Value ALARM_INPUT_UNDERVOLT_END IUVE The minimum input voltage reached during the alarm Description The measured inpu...

Page 26: ...lower than the alarm threshold The threshold is 80 of the battery deep discharge voltage 5 2 7 Name Short name Value ALARM_BATTERY_UNDERVOLT_END BUVE The minimum battery voltage reached during the ala...

Page 27: ...triggering the alarm Description The measured battery temperature is lower than the alarm threshold The threshold is the battery minimum temperature 5 2 12 Name Short name Value ALARM_BATTERY_UNDERTEM...

Page 28: ...DCU20 User Manual rev 19 Page 28 29 Name Short name Value ALARM_BATTERY_ERROR Batt error None Description The DCU20 was unable to charge the battery correctly 28 DCU20_1680 21539 0006 E 1117...

Page 29: ...DCU20 User Manual rev 19 Page 29 29 Physical dimensions 29 DCU20_1680 21539 0006 E 1117...

Page 30: ...for you Addresses and Contacts Headquarter Switzerland Angst Pfister Sensors and Power AG Thurgauerstrasse 66 CH 8050 Zurich Phone 41 44 877 35 00 sensorsandpower angst pfister com Office Germany Ang...

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