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Multiple Unit Output Connections
Parallel Connections
Load and Sense Connections
Primary/Secondary Connections
Series Connections
Parallel Connections
Parallel operation lets you connect multiple power supplies together to create a system with higher
total current and power. This applies for current sourcing as well as current sinking operation.
SHOCK HAZARD All paralleled units must be connected to ground through a
grounded power cord at all times. Any interruption of the protective (grounding)
conductor or disconnection of the protective earth terminal on any unit will cause a
potential shock hazard that could result in injury or death.
To Prevent Possible Equipment Damage:
Connect no more than twenty units of identical input and output voltage ratings. All
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units must have the same voltage rating but current ratings can be different. All
units must have the same version firmware. Refer to
the firmware version.
Always turn the ac power on and off together. Never leave any units powered on
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while the others are turned off.
Load and Sense Connections
The following figure illustrates three units connected in parallel. Note the following recommendations:
Always install the paralleled units relatively close to each other.
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Keep the cables from the power supplies to the load as short as possible and twist or bundle the
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leads to reduce lead inductance and noise pickup. The goal is to minimize the loop area or phys-
ical space between the + and - output leads from the bus bars to the load.
If the paralleled units cannot be located close together, a symmetrical arrangement of separate
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load-wire pairs of equal length connecting to a common load point is highly recommended. This
provides the best possible dynamic response.
Keysight RP7970 & RP7980 Series Operating and Service Guide
2 Installing the Instrument
Instrument Identification
for
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