64
83507013 Rev G
Remote programming in series operation for positive and negative output voltage
1. Programming by external voltage:
The analog programming circuits of this
power supply are referenced to the
negative output potential. Therefore,
the circuits used to control each series
connected unit must be separated and
floated from each other.
2. Using the SO function and PS_OK signal:
The Shut-Off and PS_OK circuits are
referenced to the isolated interface
common, IF_COM (J1-2,3). The
IF_COM terminals of the units can be
connected to obtain a single control
circuit for the power supplies
connected in series.
3. Programming by external resistor:
Programming by external resistor is
possible. Refer to Chapter 6.5 for
details.
4. Programming via the Serial
The communication port is referenced
Communication port (RS232/RS485):
to the IF_COM which is isolated from
the power supply output potential.
Therefore power supplies connected in
series can be chained using the
Remote-In and Remote-Out
connectors. Refer to Chapter 0 for
details.
5.15 Parallel Operation
Up to four units of the same VOLTAGE and CURRENT rating can be connected in parallel
to provide up to four times the Output Current capability. One of the units operates as a
Master and the remaining units are Slaves. The Slave units are analog programmed by the
Master unit. In remote digital operation, only the Master unit can be programmed by the
computer, while the Slave units may be connected to the computer for voltage, current and
status readback only. Follow the following procedure to configure multiple supplies for
parallel operation. Refer to Sec. 5.15.1 and to Sec. 5.15.2 for detailed explanation.
5.15.1 Basic Parallel Operation
In this method, setting the units as Master and Slaves is made by the rear panel J1
connections and the setup switch SW1. Each unit displays its own output current and
voltage. To program the load current, the Master unit should be programmed to the total
load current divided by the number of units in the system. Refer to the following
procedure to configure multiple supplies for basic parallel operation.
1. Setting Up the Master Unit
Set the Master unit Output Voltage to the desired voltage. Program the Output
Current to the desired load current divided by the number of parallel units. During
operation, the Master unit operates in CV mode, regulating the load voltage at
the programmed Output Voltage. Connect the sensing circuit to local or remote
sensing as shown in Fig.5-4 or Fig.5-5.
2. Setting up the Slave Units
1. The Output Voltage of the Slave units should be programmed 2-5% higher
than the Output Voltage of the Master unit to prevent interference with the
