Series Operation; Parallel Operation; Master/Slave Operation - Delta Elektronika SM1500 Series Manual

GENERAL
 The sense leads are protected against accidental interruption.
The maximum voltage between the DC output terminals and
the sense inputs is limited at 2.5 V.
 For sensing on a pulsating load see paragraph 20) of this
chapter.

3.29 SERIES OPERATION

 Series operation is allowed up to 600 V total voltage. The
power supplies can be connected in series without special
precautions.
 For easier control, Master / Slave operation is recommended
(see fig. 3 - 19).
 By using the Master / Slave series feature a dual tracking
power supply can be made with one unit as master and one
as slave.
 For series operation in combination with Power Sink option,
all units must have a Power Sink built inside otherwise no
power can be absorbed.

3.30 PARALLEL OPERATION

 Paralleling of the units has no limitations. The power supplies
can be connected in parallel without special precautions. For
easier control, Master / Slave operation is recommended
(see fig. 3 - 19 and fig. 3 - 20).
 Normal parallel operation of High Speed Programming units
can give problems, each combination has to be tested first, in
combination with the load !
 For parallel operation in combination with Power Sink option,
only one unit can have a Power Sink. Refer to Power Sink
manual for details and restrictions.
3.31 MASTER / SLAVE OPERATION
 The Master / Slave feature makes it possible to use power
supplies as building blocks to form one large unit (fig. 3 - 20).
 Mixed parallel - series operation is also possible, to a
maximum of 600 V.
 The resulting combination of units behaves like one power
supply and can be manually controlled or programmed on the
master. Figure 3 - 21 shows a computer controlled Master /
Slave parallel combination.
 Connect the different units with standard RJ45 cables (see
fig. 3 - 22), using CON B and CON C on the rear side. With
DIP switch 4 of switch SW1 the Parallel or Series mode can
be selected.
 The slaves will follow the master. The result is true current or
voltage sharing in the parallel or series mode respectively.
Note: Master / Slave parallel operation is not recommended
for more than 3 units or in combination with High Speed
Programming option. Consult factory for a solution.
11 / 22
fig 3 - 22
Use standard UTP cables
(RJ45) for Master / Slave
operation.
Master Unit:
Connect CON B to Slave1.
Slave unit:
Connect CON C to Master.
Connect CON B to Slave2.
Warning:
Never connect CON C
to CON C!
See next chapter for
more details.
DELTA ELEKTRONIKA B.V.
fig 3 - 19
Master / Slave series operation.
fig 3 - 20
Master / Slave parallel operation.
fig 3 - 21
The Master / Slave combination can also be
programmed with the interfaces PSC-488 or the
PSC-232.
SM1500
rev. Jan. 2021