5 - 32 Users Manual
5.6.2 Serial connection of output channels
Connectin
output channels in series provides a
reater volta
e capability than
can be obtained from a sin
le output channel. In principle, you can put more than
two output channels in series. However, there is the limitation that the total
maximum volta
e of each terminal may not exceed 240V with respect to the
round.
Output channels in serial confi
urations can operate in either Constant Volta
e
(CV) or in Constant Current (CC).
CV OPERATION
For CV operation all output channels must be in the CV mode. Pro
ram the
current settin
of all output channels to the desired current limit point. Then
pro
ram the volta
e settin
of each output channel, so that the sum of all
volta
es equals the total desired operatin
volta
e. The simplest way to
accomplish this is to pro
ram each output channel to an equal part of the total
desired operatin
volta
e, e.
., three output channel settin
s of 25 V in series
provide 75 V.
CC OPERATION
For CC operation the current settin
of each output channel must be
pro
rammed to the desired operatin
current. The sum of the volta
e settin
s
determines the volta
e limit points. As an example, consider two output
channels in series (refer also to section 5.6.2.1). Pro
ram the volta
e settin
of both output channels to one half of the total volta
e limit point. At load
volta
es <
1
/
2
of the total volta
e limit point, one output channel will operate
in the CC mode. At load volta
es >
1
/
2
of the total volta
e limit point, the output
channel that was in the CC mode will chan
e to the CV mode, while the other
output channel will re
ulate the current in the CC mode and provide the
balance of the volta
e required by the load.
Note that the total volta
e over the load is the sum of the individual readback
output volta
es, provided the load volta
e <
1
/
2
of total volta
e limit point.
WARNING: To
uarantee the safe use of the power supply, the total
maximum volta
e at each terminal must not exceed 240V with
respect to
round.
There are two ways of sensin
the load when connectin
output channels in
series, i.e., local sensin
and remote sensin
.
