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83
-
5
15
-
0
00
Rev.
B
41
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.
3. Programming
by external resistor:
Programming by external resistor is possible. Refer to
Se
c
tion 6
-
5 for details.
4. Programming via the Serial
The communication port is referenced to the IF_COM
Commun
i
cation port (RS232/RS485):
which is isolated from the power su
pply output potential.
Therefore power supplies connected in series can be
daisy
-
chained using the Remote
-
In and Remote
-
Out
conne
c
tors. Refer to Chapter 7 for details.
5.14.2 Series connection for positive and negative output voltage
In this mode, two units are co
n
figured 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 p
arallel 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 o
p
erating mode.
Remote programming in series operation for positive and negative output voltage
1. Programming by external voltage:
The analog programming circuits of this power su
p-
ply are referenced to the negative output potential.
Therefore, the circuits u
sed to control each s
e
ries
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 t
he units can be co
n-
nected 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
Communication port (RS232/RS485):
The
communication port is referenced to the
IF_COM which is isolated from the power supply
output potential. Therefore power supplies co
n-
nected in series can be chained using the Remote
-
In and Remote
-
Out connectors. Re
fer to chapter 7
for details.