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Chapter 4 Parallel/Series Operation
Alarm
All the alarms that are detected on a single unit are also detected during series operation.
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
To clear alarms, (1) press ALM CLR (SHIFT+SET); (2) set pin 5 of the J1 connector to LOW
(0 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.
Connection (Series Operation)
You can connect up to two units.
Caution Risk of electric shock. Turn the POWER switch off before you touch the
OUTPUT terminals. Attach the OUTPUT terminal cover after you finish wiring the
load.
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 μF 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
RMX programmable power supplies that are connected in series.
Connecting the Load (Series Operation)
Figure 4-6. Load Connection in Series Operation
Load or relay
terminal block
Unit 1
Unit 2
Output terminal
Chassis terminal
Output terminal
Chassis terminal
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