TDK 750W HALF RACK Series Operation, Series connection for increased output voltage

8.Remote/Local: If the last setting was Local Lockout, (latched mode), the supply will return to Remote mode (non-latched).

9.Address setting

10.Baud rate

11.Locked/Unlocked Front Panel (LFP/UFP)

(Items 8, 9, 10 are related to Remote Digital Control operation and are explained in Chapter 7) 12. Master/Slave setting.

5.14 SERIES OPERATION

Power supplies of the SAME MODEL can be connected in series to obtain increased output volt- age. Split connection of the power supplies gives positive and negative output voltage.

CAUTION

Do not connected power supplies from different manufacturers in series or in parallel.

5.14.1 Series connection for increased output voltage

In this mode, two units are connected so that their outputs are summed. Set the Current 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 sequence or in case one unit shuts down. Each diode should be rated to at least the power sup- ply rated Output Voltage and Output Current. Refer to Fig.5-1 and 5-2 for series operation with local and remote sensing.

WARNING

When power supplies are connected in series, and the load or one of the output terminals is grounded, no point may be at a greater potential of +/-60VDC from ground for models up to 60VDC Rated Output and +/-600VDC from ground for models >60VDC Rated Output. When using RS232/RS485 or IEEE, refer to the OUTPUT TERMINALS GROUNDING warning in Section 3.9.11.

+LS +S
POWER	+
	(*)
SUPPLY	-
-LS	-S
+LS +S
POWER	+
SUPPLY	(*)
	-
-LS	-S

+

LOAD

-

(*)Diodes are user supplied.

+LS +S
POWER	+
	(*)
SUPPLY	-
-LS	-S
+LS	+S
POWER	+
SUPPLY	(*)
	-
-LS	-S

+

LOAD

-

Fig.5-1: Series connection, local sensing Fig.5-2: Series connection, remote sensing

39

83-507-5002 Rev. B