Color Monitor Networking________________________________________________________
Ctrl Nr: PM375103 Revision: 003
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2.5.1
Power Distribution Unit (PDU)
On PDI PDUs, customers make Modbus RTU connections to the PDU’s Contractor Board. Basic and
Enhanced Contractor Boards are shown (Figures 6, 7).
Modbus RTU
Upstream
:
paralleled connectors
Modbus RTU
Downstream
:
usually wired at factory.
Modbus RTU
Upstream
Connection
Modbus RTU
Downstream
Connection to
internal PDU devices (usually wired at
factory).
Figure 6 Modbus RTU Connections: PDU Basic Contractor Board
Figure 7 Modbus RTU Connections: PDU Enhanced Contractor Board