INSTALLATION and OPERATION SORENSEN DCS SERIES MANUAL
2-8
2.6.4 Remote Sensing
The use of remote sensing permits the regulation point of the power supply to be shifted from the output terminals
to the load or other distribution terminals thereby automatically compensating for the voltage losses in the leads
supplying the load (provided these losses do not exceed 1V/line (0.5V/line for the DCS 8-125 model)). For
example, with the voltmeter reading 10.0 volts and the sense lines connected directly to the load, the load voltage
will remain regulated at 10.0 volts regardless of the voltage drops in the power leads and variations in the load
current.
On 8V, 20V, 33V, 40V, 50V, 60V and 80V models the positive sense connection is available at pin 13 of
connector J3 and the return sense connection is available at pin 12. For local sensing (regulation at the power
supply output terminals) the sense pins are connected to pins 25 (positive output) and 24 (return) of connector J3.
For remote sensing the local operation jumpers are removed and pins 13 and 12 are connected directly to the
positive and negative terminals of the load.
On 150, 300 and 600V models the sense connections are available through the output connector (See Figure 2-1
for the exact pin out). On these models no sense line jumpers are required for local operation.
Sense wires can be any size (24AWG or larger) but in high noise environments or when the lowest possible power
supply ripple is required, sense wires must be twisted and/or shielded.
NOTE:
On 8-80V models the sense leads must always be connected, either for remote or local sensing.
Operation of the supply with the sense leads disconnected will cause the output to fall to zero or to be
unregulated.
NEVER use the sense connections without the normal power lead connections to the output terminals.
Avoid reversing positive and negative sense lead connections.
2.6.5 Negative Output Operation
Operation of the unit as a negative output supply may be accomplished by referencing the positive output terminal
to the power supply chassis or some other common system ground. This mode of operation is limited to 8-150V
models only due to the metal shell 25-pin “D” connector supplied with the unit which mates to J3.
WARNING!
Operation of the 300V or 600V models in the negative output mode is in violation of the European
Community’s Low Voltage Directive.
NOTE:
If a -300V or -600V supply is required, please contact the Sorensen Sales Department or Customer Service for
availability.
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