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2 Installing the Instrument
Bus bars can be used to parallel the output terminals in a stacked configuration. Ensure that the
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cross-section area of the bus bars will accommodate the total output current of the stack. Bus bars
can be placed on either side of the output terminals. Exposed bus bar surfaces must either be
enclosed in a cabinet or insulated so that no accidental contact with lethal voltages can occur.
Use remote sensing to maintain the specified load regulation with paralleled units. Sense wires can
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either be daisy-chained or all connected directly to the sense point at the load. Twist the sense
wire pair. Do not mix remote sensing with local sensing.
Although the following figure shows the recommended use of remote sensing, local sensing may be
used if absolutely necessary. With local sensing however, the sharing circuits will work properly only if
the voltage drop measured between the local sense points of any unit to the local sense points of any
other paralleled unit is less than 0.5% of the maximum voltage rating of the units.
Parallel connection example
SHOCK HAZARD, LETHAL VOLTAGES - Many models generate output voltages up to
2,000 VDC! Ensure that all instrument connections, load wiring, load and sense
connections are insulated using high-voltage wire. Always attach the safety cover
provided, so that no accidental contact with lethal voltages can occur.
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Keysight PV8900 Series Operating and Service Guide
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