83-507-5002 Rev. B
40
Fig.5-3: Series connection for pos itive/negative output voltages
+S
+
-
-S-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
(*)
(*)
(*) Diodes are user supplied.
Remote programming in series operation for increased output voltage:
1. Programming by external voltage:
The analog programming circuits of this power su-
ply are referenced to the negative output potential.
Therefore, the circuits used to control each series
connected unit must be separated and f loated 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 different units can be
connected 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
IF_COM which is isolated from the power supply
output potential. Therefore power supplies con-
nected in series can be daisy-chained using the
Remote-In and Remote-O ut connectors. 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 rec-
ommended 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.