4-8 | ni.comChapter 4 Parallel/Series OperationSeries OperationCaution The RMX-4123 and RMX-4127 cannot be used in series operation. If youdo, the output will exceed the isolation voltage resulting in a dangerous condition.Except for the RMX-4123 and RMX-4127, you can connect up to two units in series. You cannotperform master-slave series operation. The total of the output voltages of the two units is appliedto the load. The voltage setting accuracy is the same as the accuracy of an individual unit.Features of the RMX Programmable Power SuppliesDuring Series OperationThe features of the RMX programmable power supplies during series operation are as follows:Voltage Display and Current DisplayThe voltage and current are displayed on unit 1 and unit 2. To calculate the total output voltage,add the voltages of unit 1 and unit 2.You can switch the display so that it shows power. The power is displayed on unit 1 and unit 2.Figure 4-4. Panel Display During Series OperationExternal ControlExternal control is available when connecting two units together in series.External MonitoringCaution During monitoring, be careful of shorts and electric shocks. Whenmonitoring the output voltage or output current during master-slave series operation,the electric potential of the commons of the master unit’s monitor signal and the slaveunit’s monitor signal are different.LitLit
