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mPower 300 Series (Rev G)
5.9.2.3
Configuring units for Share Bus operation
For correct Share Bus operation in parallel connection, the formerly picked master unit has to be configured as “Share
Bus master”. By default, these power supplies are set as “Share Bus slaves”, so that this configuration step is not
necessary for all slave units.
Only one unit in the Share Bus connection must be configured as Share Bus master, else the Share
Bus won’t work.
►
How to configure a system as Share Bus master
1. Switch off the DC output and push button
to call the setup menu. Push
again to enter submenu
Settings
.
2. In the submenu navigate to
General
and push
once again.
3. Use arrow button
to navigate to item
Share Bus mode
on the 2nd page and switch to setting
Master
by using
the right-hand rotary knob.
4. Accept the settings with
or discard them with
.
5.9.2.4 Operating the Share Bus system
After successful configuration and initialisation of the master and slave units, it is recommended to check all set values
and protection settings of all slaves and possibly adjust to identical values.
The slaves can be controlled manually as usual or remotely via the analog or via digital interfaces, but they don’t react to
set values changes the same way as the master. They can, if needed, be monitored by reading actual values and status.
The master unit is not restricted and can be used like a stand-alone unit.Alarms and other problem situations
Parallel operation, due to the connection of multiple units and their interaction, can cause additional problem situations
which do not occur when operating individual units. For such occurrences the following regulations have been defined:
•
If one or more slave units are switched off on the AC side (power switch, supply undervoltage) and come back later,
they’re automatically included again in the system. The remaining units will continue to work without interruption, but
the entire system will provide less power
•
If the DC output of the master unit is switched off due to a defect or overheating, then the total parallel system can
provide no output power
•
If accidentally multiple or no units are defined as master the Share Bus parallel system cannot be initialised
In situations where one or multiple units generate a hardware alarm like OV, PF or OT following applies:
•
Any alarm of a slave is indicated on the slave’s display only
