MPDU User Manual
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Note: Only the same product series can support the Daisy-chain connection. Single phase and Three phase
or A/B/C/D series cannot Daisy-chain together. For example, A series MPDU with single phase input can
be connected by A series with single phase only; D series MPDU with Three phase input can be connected
by D series with Three phase input.
5.4.2 Star Connection
Support Star connection up to unlimited MPDU through a HUB. No limitation for the PDU quantity.
MPDU1 MPDU2 MPDU3 MPDU4
5.4.3 Serial Connection settings
The Modbus-RTU protocol is used here for the Star connection, The MODBUS Serial Server connect to
the Bus arbiter, the RS485 port from the Bus arbiter connect to the SER port from each PDU. Serial
connection can support up to 32 PDUs together. See figure as below.
MPDU1 MPDU2 MPDU3 MPDU4
Serial connection settings:
1)
Log on to Web interface of each MPDU to configure the serial communication code from the Modbus
HUB
WAN/LAN
NET
PORT1
PORT2
PORT3
PORT4
........
........
Bus Arbiter
MODBUS
Serial Server
........