83
-
5
15
-
0
00
Rev.
B
40
+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
Fig.5-1: Series connection, local sensing
Fig.5-2: Series connection, remote sensing
(*)
(*)
(*)
(*)
(*)Diodes are
usersupplied.
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 d
i-
odes be connected in parallel with each unit output to prevent reverse voltage during start up s
e-
quence 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 r
e-
mote 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 output potential. Ther
e-
fore, the circuits used to control each series connected
unit must be sep
a
rated and floated from each other.
2.
Using the SO function and PS_OK signa
l: The Shut
-
Off and PS_OK circuits are refe
r
enced to the
isolated interface common, IF_COM (J1
-
2,3). The
IF_COM terminals of different units can be co
n
nected to
obtain a single control circuit for the power supplies co
n-
nected in series.
CAUTION
Do not connected power supplies from diffe
r
ent
manufacturers in series or in parallel.
WARNING
When power supplies are connected in s
eries, 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,
ref
er to the OUTPUT TERMINALS GROUNDING
warning in Section 3.9.11.