TDK 1500W, 750W technical manual Series connection for positive and negative output voltage

3.	Programming by external resistor:	Programming by external resistor is possible. Refer to
		Section 6-5 for details.
4.	Programming via the Serial	The communication port is referenced to the IF_COM
	Communication port (RS232/RS485):	which is isolated from the power supply output potential.
		Therefore power supplies connected in series can be
		daisy-chained using the Remote-In and Remote-Out con-
		nectors. Refer to Chapter 7 for details.

5.14.2 Series connection for positive and negative output voltage

In this mode, two units are configured as a positive and negative output. Set the Output Current limit of each power supply to the maximum that the load can handle without damage. It is recommended that diodes be connected in parallel with each unit output to prevent reverse voltage during start-up 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.5-3 for this operating mode.

+LS +S

POWER + SUPPLY -

-LS -S

+LS +S

POWER + SUPPLY -

-LS -S

(*)

(*)

+

-

(*) Diodes are user supplied.

Fig.5-3: Series connection for positive/negative output voltages

Remote programming in series operation for positive and negative output voltage

1.	Programming by external voltage:	The analog programming circuits of this power sup-
		ply are referenced to the negative output potential.
		Therefore, the circuits used to control each series
		connected unit must be separated and floated from
		each other.
2.	Using the SO function and PS_OK signal:	The Shut-Off and PS_OK circuits are referenced to
		the isolated interface common, IF_COM (J1-2,3).
		The IF_COM terminals of the units can be con-
		nected to obtain a single control circuit for the power
		supplies connected in series.
3.	Programming by external resistor:	Programming by external resistor is possible. Refer
		to section 6.5 for details.
4.	Programming via the Serial	The communication port is referenced to the
	Communication port (RS232/RS485):	IF_COM which is isolated from the power supply
		output potential. Therefore power supplies con-
		nected in series can be chained using the Remote-
		In and Remote-Out connectors. Refer to chapter 7
		for details.
		40

83-507-013 Rev. D