TDK Lambda | Z+Low Voltage User Manual

5.4 Series Operation Power supplies of the samemodel can be connected in series to obtain increased output voltage. Split connection of the power supplies gives positive and negative output voltage. WARNING: Whenpower supplies are connected in series, and the loador one of the output terminals is grounded, no point may be at a greater potential of +/- 100VDC from ground. 5.4.1 Series Connection for Increased Output Voltage Two units are connected so that their outputs are summed. Set the current limit of each power supply to themaximum that the load can handlewithout damage. It is recommended that diodes be connected inparallel with eachunit output toprevent reverse voltage during start up sequence or in case one of the units shuts down. Each diode should be rated to at least the power supply rated output voltage and output current. Refer to Fig.5-1 and Fig.5-2 for series operation with local and remote sensing.

+S

+LS

+S

+LS

+ -

+ -

POWER SUPPLY

POWER SUPPLY

(*)

(*)

-S

-S

-LS

-LS

+

+

LOAD

LOAD

-

-

+S

+LS

+S

+LS

+

+

(*) Diodes are user supplied.

POWER SUPPLY

POWER SUPPLY

(*)

(*)

-

-

-S

-S

-LS

-LS

Fig.5-1: Series connection, local sensing

Fig.5-2: Series connection, remote sensing

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