6.2 Series operation

Two units can be seriesly connected to increase the output voltage or to create a bipolar voltage source. It is recommended to connect diodes in parallel with each output to prevent reverse voltage in case of failure in one of the power supplies. Each diode should be rated to at least the power supply rated output voltage and output current. Refer to Fig 6-5 and 6-6 for typical lseries connection of power supplies.

Series connection for increased output voltage.

FPS1000

#1

 

+S

 

+V

 

 

 

 

 

 

(*)

 

SIG.

ON/

-V

 

RTN

OFF

-S

10

7

 

FPS1000

#2

 

+S

 

+V

 

 

 

 

 

 

(*)

 

SIG.

ON/

-V

 

RTN

OFF

-S

10

7

 

+S

+V

LOAD

-V

-S

(*) Diodes are user supplied

Fig 6-5: Series connection for increased output voltage

Series connection for positive and negative output voltage.

FPS1000

#1

 

+S

 

+V

 

 

 

 

 

 

(*)

 

SIG.

ON/

-V

 

RTN

OFF

-S

10

7

 

FPS1000

#2

 

+S

 

+V

 

 

 

 

 

 

(*)

 

SIG.

ON/

-V

 

RTN

OFF

-S

10

7

 

(*) Diodes are user supplied

+V LOAD

COMMON

-V

Fig 6-6: Series connection for Bipolar output voltage

CAUTION

Series operation is not applicable for units with I2C bus option.

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TOA Electronics FPS-S1U, FPS1000-24, FPS-T1U Series operation, Series connection for positive and negative output voltage