Output isolation
The outputs of the E36200 Series power supplies are isolated from earth ground. Any output terminal may be
grounded, or an external voltage source may be connected between any terminal output and ground. However,
output terminals must be kept within ±240 Vdc of ground. Any one of the terminals can be tied to ground as
needed. An earth ground terminal is provided on the front panel for convenience.
SHOCK HAZARD
. Floating voltages must not exceed 240 Vdc. No output terminal may be more than 240 Vdc
from chassis ground.
Ensure that transient voltages does not exceed 480 Vpk when connected in series.
Before making any external connection, ensure the equipment input supply is grounded to MAINS.
The figure below shows an example of floating a power supply to 200 V above ground. The power supply output is
set to 40 V.
Example of negative terminal fl200 V above ground (positive terminal is +240 V above ground)
You can see from this example that you have to take the power supply output voltage into consideration when
ensuring you are not violating the float voltage rating. If you exceed the float voltage rating of the power supply, you
are potentially exceeding the voltage rating of internal parts that could cause the internal parts to fail or break down
and present a shock hazard, so do not violate the float voltage rating!
Multiple loads
When connecting multiple loads to the power supply, each load should be connected to the output terminals using
separate connecting wires. This minimizes mutual coupling effects between loads and takes full advantage of the
low output impedance of the power supply. Each pair of wires should be as short as possible and twisted or shielded
to reduce lead inductance and noise pick-up. If a shield is used, connect one end to the power supply ground
terminal and leave the other end disconnected.
If cabling considerations require the use of distribution terminals that are located remotely from the power supply,
connect output terminals to the distribution terminals by a pair of twisted or shielded wires. Connect each load to
the distribution terminals separately.
For multiple load application, all loads should either be connected to the front panel binding post or rear panel
output.
Turn on AC power before connecting loads to prevent currents from damaging the loads.
Keysight E36200 Series User's Guide
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