Kikusui PWX750ML, User Manual

Page: 77 / 110

PWX
77
Series Operation
Parallel
/Series Operation
4
Remote sensing
p.20
To perform remote sensing, connect the PWX750MLs in series, and then connect the sensing
cables to them as shown in the following figure.
Alarm
All the alarms that are detected on a single unit are also detected during series operation.
p.40
You can use the CONFIG settings to specify what happens when the output is turned off
because an alarm is detected. You can select to turn the output on automatically when the
problem that caused the alarm is fixed (CF03: Auto) or to leave the output turned off when the
problem is fixed (CF03: SAFE).

Clearing alarms
p.31, p.79
To clear alarms, (1) press ALM CLR (SHIFT+SET); (2) set pin 5 of the J1 connector to LOW
(0 V to 0.5 V) or shorted; or (3) turn off unit 1 and unit 2, fix the problem that caused the
alarm, and then turn on unit 1 and unit 2.
See
CAUTION
• If the sensing cables are not connected properly, the load may be exposed to excessive
voltage, and the PWX750MLs may be damaged.
• When the load cables are distributed over longer distance, the phase shifting due to wiring
inductance and capacitance may go beyond the limit and result in oscillation. To prevent
such oscillation, connect an electrolytic capacitor with several hundreds to several tens of
thousands
μ
F across the load.
Use an electrolytic capacitor with a withstand voltage that is 120% or more of the total of
the rated output voltages of the PWX750MLs that are connected in series.
+
+
–
–
C
Connect an
electrolytic
capacitor across
the load as
necessary.
Load
+S
-S
+S
-S
Output terminal
Chassis terminal
Sensing terminal
Unit 1
Unit 2
Output terminal
Chassis terminal
Sensing terminal
Connecting the sensing cables
during series operation
See
See