iHP Manual 32 | P a g e
Digital Communication
Digital communication is necessary to setup and operate the iHP system. Digital communication will be used to:
Read the configuration setting of the iHP
Change the configuration setting of the iHP
Voltage, current, temperature, and power reporting
Status reporting
SW updates for module, PFC, and ISOCOMM
Available user digital communications interfaces for the iHP are CAN, RS485, and Ethernet. The connection
ports are shown in Figure 3-1. Ethernet (UDP protocol), RS485 (custom RS485 protocol), and CAN (custom CAN
protocol) protocol specifications are in a separate document.
Communication with the iHP system is controlled via the iHP ISOCOMM (ISOlated COMMunication) section of
the supply. All commands are sent to and from the iHP ISOCOMM via the digital communication link. Once a
command has been sent to the iHP ISOCOMM, ISOCOMM will handle the sending of the information to the
internal PFC section and installed modules. The ISOCOMM functions as a bridge between iHP internal
communication and iHP external communication.
Inside the iHP rack, there is an Internal Communication Bus. The installed modules, PFC (Primary Side), and
ISOCOMM are all connected to this Internal Communication Bus, but are electrically isolated from each other
per safety requirements. ISOCOMM manages the internal communications and external communication of the
iHP. Once ISOCOMM receives a command from the user, ISOCOMM will transmit the command to the module
or PFC section of the iHP. If the user needs data from a module or PFC device, the module or PFC device will
transmit data to the ISOCOMM and ISOCOMM will be the one to send data to the user.
Figure 3-1 12kW and 24kW ISOCOMM Section
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