63
83507013 Rev G
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 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 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 Chapter 0 for
details.
4. Programming via the Serial
The communication port is referenced
Communication port (RS232/RS485):
to the IF_COM 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
connectors. Refer to Chapter 0 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.
Fig.5-3: Series connection for positive/negative output voltages
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
(*)
(*)
(*) Diodes are user supplied.
