3 Series / Parallel operation
in Modular power supply
3.1 Series operation
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Series operation is possible only between identical output mod-
ules.
The copper bar for series connection is assembled before ship-
ping.
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The output current in series operation is the same as the one of
the individual modules that are connected.
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Please note the following items,
1
Only same modules can be connected in series.
2
Total of the rated voltage in series has to be 48V or less.
Adjusting output voltage is possible within 60V.
3
The series operation is not available along with the parallel op-
eration.
Please contact us for any other conditions.
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When in series, the output voltage at the start-up might have the
step as shown in Fig.3.1.
AC Input voltage
Input ON
Output voltage
Fig.3.1 Start-up waveform in series operation
4 Functions
4.1 Input voltage range
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The input voltage range is from 85 VAC to 264 VAC.
The rated input voltage range for the safety approvals is from
100VAC to 240VAC (50/60Hz).
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If the input voltage was out of the above range, the power supply
might not meet the specification or might fail.
Please do not apply the square wave of the UPS, the inverter and
so on to the power supply.
4.2 Inrush current limiting
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If the switch is installed on the input, please select the one which
can work at the inrush current.
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The relay is used in the inrush current limiting circuit. If the interval
of the input on/off was short, the inrush current limiting might not
work correctly. So, please make its interval long enough.
And, it makes the primary and the secondary inrush current.
4.3 Overcurrent protection
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The overcurrent protection which will activate at 105% or more of
the rated current is built in. The output will automatically recover
when the overcurrent condition is resolved.
Please do not use the unit with short circuit and/or under the over-
current condition.
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Hiccup mode
When the overcurrent protection circuit activates and the output
voltage drops, the output will get intermittent so that the average
current decreases.
4.4 Thermal protection
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The unit has the thermal protection.
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The thermal protection circuit might activate and shut down the
output under the following conditions.
1
The case that the output current and/or the ambient tempera-
ture exceed the derating curve.
2
The case that the fan stops working or the air volume is de-
creased by blocking the fan.
When the thermal protection activates, outputs on all output mod-
ules will shut down.
When either one of the following actions is taken, the output will
recover.
1
Turn the input voltage off and solve all of overheating cause.
Then, turn the input on after enough time to cool the unit down.
2
Turn all outputs off by GI terminal and solve all of overheating
cause. Then, turn all outputs on by GI terminal after enough
time to cool the unit down.
AC-DC Power Supplies Configurable Type
Instruction Manual
AME-11
