SORENSEN DCS SERIES MANUAL INSTALLATION and OPERATION
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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 lamp 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.
2.9.2 Remote Programming of OVP With External Voltage Sources
To remotely program the OVP trip level using a 0-5V or 0-10V DC voltage source use the following procedure:
1. With the unit off and disconnected from its AC source, remove the cover and set switch SW1-4
closed (default factory setting) for 0-5V programming or open for 0-10V programming. Also check
that switch SW1-8 is closed (default factory setting). Set the front panel OVP adjusting
potentiometer fully clockwise (until audible clicking is heard or 20 turns maximum).
2. Remove the default jumper connecting pins 16 and 3 of connector J3 and connect the voltage source
between pins 3 (positive) and 12 (negative). Set the programming source voltage to maximum.
3. Turn the unit on and adjust the output to the desired trip voltage.
4. Slowly reduce the programming voltage until the red OVP indicator lamp lights and the power
supply shuts down.
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.
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