PSU Series User Manual 
82 
The output reference ground (COMMON) can be 
grounded at the power supply side instead of the load, 
depending on the requirements. Local sensing should 
be used in this configuration.  
When connecting the units in series, diodes should be 
connected across each output to prevent reverse 
voltage.  
1.  Ensure the power is off on both power supplies. 
2.  Connect the master and slave unit in series as 
shown above to either increase the voltage 
output or to create a positive and negative 
output. Remember that how the units are 
grounded depends on the configuration of the 
series connection. 
3.  Use diodes across the output terminals to 
prevent reverse voltage at startup or if one of 
the units unexpectedly shuts down. Ensure the 
diodes are rated to withstand the voltage and 
current output of the power supply. 
4.  Reattach the terminal cover. 
Ensure load cables have sufficient 
current capacity. 
Series Operation 
 
Before using the power supplies in series, the 
master and slave units need to be configured.   
1.  Configure the OVP, OCP and UVL 
settings for each unit.