User`s manual

61
And the noise across the output terminals is of very low value in the ARRAY 366XA.
The noise from the terminals to earth ground can be a problem for very sensitive
circuitry that is referenced to earth ground. When a circuit is referenced to earth
ground, a low level line-related AC current will flow from the output terminals to
earth ground. Any impedance to earth ground will create a voltage drop equal to the
current flow multiplied by the impedance. To minimize this effect, the output terminal
can be grounded at the output terminal. Alternately, any impedance to earth ground
should have a complementary impedance to earth ground to cancel generated
voltages.
Connecting the Load
Output Isolation
The output of the power supply is isolated from earth ground and the power supply
can be connected to the ground with the earth ground terminal when needed. Any
output terminal can be grounded, and an external voltage source may be connected
between any terminal output and ground. However, output terminals must be kept
within ±240 Vdc of ground. An earth ground terminal is provided on the front panel
for convenience.
Multiple Loads
When connecting multiple loads to the power supply, each load should be connected
to the output terminals with 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. And for safety consideration,
connecting lead with a large diameter is preferred to avoid overheat in heavy current
condition. 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 binding terminals
separately.
To satisfy safety requirements, load wires must be heavy enough to
avoid overheat while carrying the high output current of the power
supply.