INSTALLATION and OPERATION SORENSEN DCS SERIES MANUAL
2-10
2.8.1 Series Operation
Series operation is used to obtain a higher voltage single output supply using two or more single units. Connect
the negative terminal (-) of one supply to the positive terminal (+) of the next supply of the same model. The total
voltage available is the sum of the maximum voltages of each supply (add voltmeter readings).
Notes:
1. The maximum allowable sum of the output voltages is 300V. This is limited by the
creepage/clearance distances internal to the construction of the metal shell 25-pin ‘D’ connector
mated to J3. If a higher output voltage range is required, contact the Sorensen Sales Department or
Customer Service for availability.
2. The maximum allowable current for a series string of power supplies is the rated output current of a
single supply in the string.
3. Remote sensing should not be used during series operation.
2.8.2 Parallel Operation
Parallel operation is used to obtain a higher current single output supply using two or more single units. Set all of
the outputs to the same voltage before connecting the positive terminals (+) and negative terminals (-) in parallel.
The total current available is the sum of the maximum currents of each supply.
Caution: To prevent internal damage, ensure that the OVP trip level of all supplies is set to maximum.
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.
Refer to paragraph 2.6.4 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.
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