Installation 2
Series N8700 User’s Guide 27
Output Voltage Sensing
WARNING
SHOCK HAZARD There is a potential shock hazard at the sense connector
when using a power supply with a rated output greater than 40V. Ensure that
the local sense and remote sense wiring insulation rating is greater than or
equal to the maximum output voltage of the power supply. Ensure that the
connections at the load end are shielded to prevent accidental contact with
hazardous voltages.
Local and remote sense connections are made at the J2 connector.
The connector has a removable plug that makes it easy for you to
make your wire connections. Refer to the following figure for the
terminal assignments.
The J2 connector plug specifications are as follows:
Plug Type: MC 1.5/5-ST-3.81, Phoenix
Wire Size: AWG 28 to AWG 16
1.95 – 2.21 in-lb (0.22 – 0.25 Nm)
Local Sensing
The power supply is shipped with the rear panel J2 sense connector
wired for local sensing of the output voltage. With local sensing, the
output voltage regulation is made at the output terminals. This
method does not compensate for voltage drop on the load wires,
therefore it is recommended only for low load current applications or
where the load regulation is less critical. The following figure
illustrates the internal connections of the J2 connector.
1 Remote sense (+)
2 Local sense (+)
3 Not connected
4 Local sense (-)
5 Remote sense (-)
-
-
Rem.sense
Local sense
Local sense
Rem.sense
+
Load lines, twisted
pair, shortest length
possible.
+V
-V
Load
+
Power
Supply
+
Error
Amp.
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