Installation
2
Series N8700 User’s Guide
33
Grounding the Output
The output of the power supply is isolated from earth ground. Either
positive or negative voltages can be obtained from the output by
grounding (or "commoning") one of the output
terminals. Always use
two wires to connect the load to the output regardless of where or
how the system is grounded.
To avoid noise problems caused by common-mode current flowing
from the load to ground, it is recommended to ground the output
terminal as close as possible to the power supply chassis ground
.
WARNING
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be more
than ±60 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Positive output
shall be more than ±600 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Negative output
shall be more than ±400 VDC above or below chassis ground.
Parallel Connections
CAUTION
Only power supplies that have identical voltage and current ratings can be
connected in parallel.
Up to four units of the same voltage and current rating can be
connected in parallel to provide up to four times the output current
capability. Refer to the following figures for typical connections of
parallel power supplies using either local or remote sensing. The
figures show two units, however, the same connection method
applies for up to four units.
Local Sensing
+ V
- V
+ V
- V
+S
+LS
-S
-LS
MASTER
POWER SUPPLY
SLAVE
POWER SUPPLY
LOAD
J1-25
J1-10
Parallel
Curr Prog
As short as possible
Twisted
pair
J1-8 J1-12
J1-12
J1-23
Common
Curr Prog Rtn
+S
+LS
-S
-LS
