60
83503001 Rev G
5.14.
Series 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.
CAUTION
Do not connect 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 supply 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.
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
(*)
(*)
(*)
(*)
(*) Diodes are
user supplied.
Fig. 5-1: Series Connection, Local Sensing
Fig. 5-2: Series Connection, Local & Remote Sensing
