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Siemens SITOP DC UPS 6EP1931-2FC21, Considerations For Use, Page: 1 / 18

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© Siemens AG, 2009 

1/18 

 

 
 
 
 
 

Considerations for Use 

 

 

 of the SITOP DC UPS Module 

 

 

 

6A without interface    (6EP1931-2DC21) 
6A with serial interface    

(6EP1931-2DC31) 

6A with USB interface  

 

(6EP1931-2DC42) 

 
15A without interface 

 

(6EP1931-2EC21) 

15A with serial interface   

(6EP1931-2EC31) 

15A with USB interface    

(6EP1931-2EC42) 

 
40A without interface 

 

(6EP1931-2FC21) 

40A with USB interface    

(6EP1931-2FC42) 

 

500S (15A / 2.5kWs capacitor) (6EP1933-2EC41) 
500S (15A / 5kWs capacitor) 

(6EP1933-2EC51) 

 
500P (15A / 5kWs capacitor) (6EP1933-2NC01) 
500P (15A / 10kWs capacitor) (6EP1933-2NC11) 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Release 2 

 

Summary of Contents for SITOP DC UPS 6EP1931-2FC21

Page 1: ...ce 6EP1931 2DC42 15A without interface 6EP1931 2EC21 15A with serial interface 6EP1931 2EC31 15A with USB interface 6EP1931 2EC42 40A without interface 6EP1931 2FC21 40A with USB interface 6EP1931 2FC42 500S 15A 2 5kWs capacitor 6EP1933 2EC41 500S 15A 5kWs capacitor 6EP1933 2EC51 500P 15A 5kWs capacitor 6EP1933 2NC01 500P 15A 10kWs capacitor 6EP1933 2NC11 Release 2 ...

Page 2: ...nication with the PC Only Devices with Serial or USB Interface 8 4 1 Design of Interface 8 4 1 1 Serial Connection 8 4 1 2 USB Connection 9 4 2 Transmit Data of the SITOP DC UPS Module 9 4 3 Receive Data of the SITOP DC UPS Module 9 4 3 1 Serial Connection 9 4 3 2 USB Connection 10 5 Operating Modes 11 5 1 Long Power Failure in Devices without an Interface 11 5 2 Brief Power Failure in Devices wit...

Page 3: ... available at the consumers Load 1 in Figure 1 and at the input of the SITOP DC UPS module The SITOP DC UPS module loads the connected battery module and provides 24VDC for the critical consumer Load 2 in Figure 1 The green OK LED lights up and the X2 2 X2 3 OK relay contact is made When the charge of the connected battery has reached a value of approximately 85 the green Bat 85 lights up and the ...

Page 4: ... Threshold If the input voltage sinks below the set value of the cut in threshold the UPS module switches into buffer mode The consumers are then supplied solely by the battery module The setting of the cut in threshold takes place using three DIP switches for position see Figure 2 according to Table 1 Setting range 22 0 to 25 5 VDC in 0 5V steps delivery state 22 5VDC 0 1V Precision 1 8 cut in tr...

Page 5: ...harging Current The battery module is charged using constant current until the set end of charge voltage is reached The charging procedure is then complete During the setting of the charging current the data for the battery module used must be observed when selecting the optimum setting The charging current is set using a DIP switch for position see Figure 2 Setting ranges SITOP DC UPS 6 6EP1931 2...

Page 6: ... Switch position On 1 Off 0 Switch 1 at Pos On Setting for deactivation after the desired buffering time Switch 1 at Pos Off Deactivation takes place after the exhaustive discharge threshold of the battery is reached For devices with interfaces the voltage can be disconnected in remote mode after the set buffering time DIP Switch 8 Disconnection On Table 5 Selecting the buffering time Table 6 Sett...

Page 7: ...bility exists only on the SITOP 40A DC UPS module 6EP1931 2FC21 and 6EP1931 2FC42 In this way the Analogous to new DC UPS family or Analogous to previous DC UPS module 40 6EP1931 2FC01 signaling can be selected Switch position On 1 Off 0 Switch 10 at Pos On Signaling analogous to previous DC UPS module 40 6EP1931 2FC01 Switch 10 at Pos Off Signaling analogous to new DC UPS family Table 9 Selecting...

Page 8: ...2 4 X2 5 relay contact Alarm are blinking in a 2s cycle the battery is defective but buffer mode can still take place The set buffering times however can no longer be observed An exchange of the battery module is required 4 Communication with the PC Only Devices with Serial or USB Interface SITOP DC UPS modules with serial or USB interfaces can also send operating state data to a connected PC or a...

Page 9: ... buffer readiness Battery charging BA 85 BA 85 Battery charging 85 Battery charging 85 Normal mode DC_OK DC_LO No input voltage Buffer mode BAT No buffer mode In case of a defective battery the Alarm Buffer Ready signal changes at a frequency of 0 25Hz and a keying ratio of 0 5 Table 10 Transmit Data of SITOP DC UPS Module 4 3 Receive Data of the SITOP DC UPS Module The SITOP DC UPS module can rea...

Page 10: ...industrial PC Signal S Shutdown Timerstart From the PC the S signal ShutDown Timer Start signal is sent to the input buffer of the USP module When this signal is received and the subsequent polling of the USB devices by the IPC master during the shutdown process is completed the buffering time set using DIP Switches 2 through 7 of the lower switch panel is started and when this time is up the outp...

Page 11: ...ivation tp Buffering time set at the DIP switches under Row 2 to 7 5 1 Long Power Failure in Devices without an Interface Vin Vout ok Bat Diagram 2 Long power failure in devices without an interface Resumption of power supply when the buffering time tp is up t3 is temporally after t4 In the input voltage of the DC UPS module drops time t1 the Bat battery immediately assumes the direct voltage supp...

Page 12: ... resting position Bat At the same time t1 the buffering time tp set on the DIP switches starts automatically If the Output Ua Interruption DIP switch setting is selected the output voltage Ua is automatically interrupted for 5 seconds after the buffering time tp time t4 is up The battery is already switched off because the input voltage has returned to time t3 f the DIP switch is not set to Output...

Page 13: ...se of USB communication In the case of the selected Output Ua Interruption DIP switch setting the output voltage Ua is automatically interrupted for approximately 5 seconds when the set buffering time is up time t4 and at the same time the battery which has not yet been disconnected due to a lack of input voltage is deactivated from the output Note Without the remote signal level 0 with the time p...

Page 14: ...Output Ua Interruption DIP switch setting is selected the output voltage Ua is automatically interrupted for approximately 5 seconds after the buffering time tp time t4 is up The battery is already switched off because the input voltage has returned to time t3 The interruption of the output voltage Ua for 5 seconds enables the automatic rebooting of industrial PCs even if the mains voltage or the ...

Page 15: ...o 25 1V at 0 05C and to 23 7V at 2C The difference between 1C immediate fall to 24 3V and 2C immediate fall to 23 7V amounts to only 0 6V Between 2C immediate drop to 23 7V and 3C immediate drop to 21 6V the extreme non linearity does not appear The voltage does not drop by a further 0 6V as in case of 1C to 2C but rather by a whole 2 1V A further increase of the charging current from 3C to 5C doe...

Page 16: ...rrent of 5 x 3 2Ah x 1 h 16A 3C means Charging current 3 x battery capacity x 1 h i e in case of a 3 2Ah battery module 3C is a charging current of 3 x 3 2Ah x 1 h 9 6A while in case of a 7Ah battery module 3C is a charging current of 3 x 7Ah x 1 h 21A 1C is particularly easy 3 2A charging current for a 3 2Ah battery module 7A charging current for a 7Ah battery module or 12A charging current for a...

Page 17: ...oubles 7 min and this value here 7 min is entered on the abscissa horizontal time axis of the characteristic field 6 The next point of intersection lying to the right above this value here 7 min between the horizontal line parallel to the abscissa according to item 3 and the respective discharging characteristic yields the value sought C in the example here the point of intersection of the horizon...

Page 18: ...eral descriptions or features that do not always apply in the concrete case of application or which may change due to the further development of the products Subject to change Errors and omissions excepted Siemens AG 2009 Industry Sector Industry Automation SC PP POB 48 48 DE 90026 Nuremberg Germany ...

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