Sorensen DCS Series 1kW and 1.2kW Supplies
Installation and Operation
M362500-01 Rev K
2-13
2.8.3
Split Supply Operation
Split supply operation is used to obtain two positive voltages with a common ground, or a
positive-negative supply.
To obtain
two positive voltages
, connect the negative terminals of both supplies together. The
positive terminals will supply the required voltages with respect to the common connection.
To obtain a
positive-negative supply
, connect the negative terminal of one supply to the
positive terminal of the second supply. The positive terminal of the first supply then provides a
positive voltage relative to the common connection while the negative terminal of the second
supply provides a negative voltage. The current limits can be set independently. The maximum
current available in split operation is equal to the rated output of the supplies used.
CAUTION
Refer to Section 2.6.5 for additional information pertaining to negative output
configured supplies.
2.9
Over Voltage Protection (OVP)
The OVP circuit allows for protection of the load in the event of a remote programming error,
incorrect voltage control adjustment, or power supply failure. The protection circuit monitors the
output and reduces the output voltage and current to zero whenever a preset voltage limit is
exceeded. A red LED on the front panel indicates when the OVP circuit has been activated.
Resetting the OVP circuit after activation requires removal of the over-voltage condition and
powering the unit OFF and back ON or momentarily activating the remote shut down circuit
(See
Section 2.10
for information on shut down circuit operation). The OVP trip level can be
set using either the front panel potentiometer or by using one of three remote programming
methods (voltage, resistance or current) through the J3 connector at the rear of the unit.
2.9.1
Front Panel OVP Operation
To set the trip level from the front panel, use the following procedure:
1. With the unit off and disconnected from its AC source remove the cover and check
that switches SW1-4 and SW1-8 are closed (factory default setting). Also check that
the jumper between pins 3 and 16 of connector J3 is in place.
2. Using a small flat bladed screwdriver through the OVP ADJUST hole in the front
panel, turn the adjusting screw fully clockwise (until audible clicking is heard or 20
turns maximum).
3. Turn the unit on and adjust the output to the desired trip voltage.
4. Slowly turn the adjusting screw counterclockwise until the red OVP indicator lights
and the power supply output shuts off.
5. Turn the POWER switch to OFF.
6. Turn the voltage control knob to minimum.
7. Turn the POWER switch back ON and increase the voltage to check that the power
supply shuts off the output at the desired voltage.
