iHP Manual 71 | P a g e
4.4.2.1.3 DCS Protection: Over Voltage Protection (OVP)
Over voltage protection level during DCS will be based on the OV Fault Limit Multiplier (48h) and VREF (B1h)
setting.
OV Level = (48h OV_FAULT_LIMIT_MULTIPLIER) x (B1h VREF)
The module will shut down when the output voltage reaches the OVP level and a fault status will be reported.
4.4.2.1.4 DCS Protection: Under Voltage Protection (UVP)
During DCS operating mode, under voltage protection is not functional.
4.4.3 Module Grouping for Series or Parallel Connection Digital Operation
Modules can be operated in Series or Parallel connection during Digital Mode. Below are list of possible series
or parallel connections.
DVS parallel connection
DVS series connection
DCS parallel connection
To work properly, the modules must be connected in parallel or series. Only modules of the same model can
be connected in series or in parallel. When a certain module will be included in the group, there are
restrictions in place to protect the user and system. Please refer to Section 5.1.5.2 for Module Grouping
configuration and Section 6 for Module Grouping details.
4.4.3.1 DVS Parallel Connection
All modules connected in parallel should:
be grouped as one using ISOCOMM WebTool.
have the same module configuration.
have positive terminals connected in parallel.
have negative terminals connected in parallel.
have “ISHARE” signals (Module’s J2 pin 10) star connected.
have “D_RTN” signals (Module’s J2 pin 4) star connected.
have “REMOTE_SENSE_+” star connected and connected to the desired point of regulation.
have “REMOTE_SENSE_-” star connected and connected to the desired point of regulation.
To change Group Module output voltage, the user needs to send below B1h (VREF) command to the group.
< Data is the Set Voltage>
*Before writing to this command, please ensure that the Group Address Write Protect (10h) is disabled.
The group output voltage can be programmed within 5% to 120% of the nominal output voltage. Setting the
VREF value beyond the acceptable range, but not to 0V, the module will trigger a Status CML fault and will
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