Specifications

Floating the Output Above Ground
Question: Can I “float” the power supply above ground?
Answer: The chassis of the power product must always be referenced to earth ground, for safety reasons. However,
the output is isolated and may be connected to a point other than ground. It is most common for the output to be
connected to circuit common, but in some applications it is advantageous to have the power supply output referenced
to some voltage above (or below) ground.
For most Agilent Power Products, the maximum floating voltage is +/- 240 volts from chassis ground. However, the
following products have different isolation voltages as indicated:
6015A/6035A: +/-550 volts
68xxA: 300 vrms
66312A: +/- 50 volts
E3631A 6 volt output: +/-25 volts
Floating a power supply can represent a hazard to people and equipment. Be aware of the following considerations
when floating a power product.
Digital I/O ports are referenced to ground, regardless of where the power product output is referenced.
A grounded analog programming source may short out the current sense resistor causing uncontrolled output currents
or blown tracks on the power supply circuit board. Be sure the programming source is fully isolated. Think through
all connections carefully.
Multiple grounds in the system can cause ground loops resulting in extra noise, and possible dc measurement errors.
Be sure to consult the Application Information section of the Power Products Catalog for more information on
these and other applications.