Remote Operation; Series Operation; Series Connection For Increased Output Voltage - Delta D750 User Manual

User Manual
D750
DC Power Supply
9. Address setting
10. Baud rate
11. Locked/Unlocked front panel (LFP/UFP) (Items8, 9, 10 are related to Remote digital
control operation and explained in sec. 4.2)
12. Master/Slave setting

3.4 Remote Operation

Power supplies of the SAME MODEL can be connected in series to obtain increased output
voltage. Split connection of the power supplies gives positive and negative output voltage.
Do not connect power supplies from different manufacturers in series or in parallel.

3.4.1 Series Operation

3.4.1.1 Series connection for increased output voltage

In this mode, two units are connected so that their outputs are summed. Set the 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 sequence or in case one of the units shuts down. Each
diode should berated to at least the power supply rated output voltage and output current.
Refer to Fig.3-5 and 3-6 for series operation with local and remote sensing.
Fig.3-5: Series connection, local sensing
Remote programming in series operation for increased output voltage:
1. Programming by external voltage: The analog programming circuits of this power
supply are referenced to the negative Sense (-S) potential. Therefore, the circuits used
to control each series connected unit must be separated and floated from each other.
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+LS +S
+
POWER
(*)
SUPPLY
-
-LS -S
+LS +S
+
POWER
(*)
SUPPLY
-
-LS -S
CAUTION
POWER
SUPPLY
+
LOAD
L
-
POWER
(*)Diodes are
SUPPLY
user supplied
Fig.3-6: Series connection, remote sensing
+LS +S
+
(*)
-
-LS -S
+
L
-
+LS +S
+
(*)
-
-LS -S
LOAD