Basic Operation
Sorensen DCS Series 3kW Supplies
3.3 Using Remote Sensing
Remote sensing is used during voltage mode operation to shift the power supply's regulation
point from its output terminals (default sense point) to the load or distribution terminals by using
a separate pair of wires to monitor the load voltage. Remote sensing allows the power supply to
compensate for voltage losses in the load lines (up to 1V per line) which will otherwise degrade
the regulation of the supply. The sense line connection points are located on the rear panel J3
connector. See
for more information about making J3 connector changes.
CAUTION
Do not use remote sensing with multiple supplies connected in series or
in parallel.
3.3.1
Connecting Remote Sense Lines
To connect remote sense lines, refer to
and to the following procedure:
1. Ensure the power supply is turned OFF. Allow five (5) minutes to elapse to dissipate
stored energy before altering J3 connector pin connections.
2. Remove the local sense jumpers connecting J3 pins 13 to 25 (positive sense) and pins
12 to 24 (negative sense or return sense).
3. Connect the positive sense lead to pin 13 and the negative lead to pin 12. Use shielded-
twisted pair wiring of 24 AWG or larger for sense lines.
4. Ground the sense line shield, at one point only, to the power supply's return output
connection at the load, or, to the power supply's return output at its output terminal, or to
the power supply's chassis.
5. The optimal point for the shield ground must be determined by experiment, but the most
common connection point is at the power supply's return output connection at the load.
6. Turn the power supply ON.
Notes:
1. If the power supply is operated with remote sense lines connected and with either of the
positive or negative load lines
not
connected, the power supply shutdown circuit will be
activated, causing the output voltage and current to fall to zero.
2. If the power supply is operated
without
remote sense lines
or
local sense jumpers in
place, the supply will continue to work, but supply regulation will be degraded and/or
erratic.
3-4
Operation Manual
