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How is expansion I/O module added to SCADAPack PLC?

When the amount of available I/O on the SCADAPack PLC is exceeded by process requirements, additional 5000 Series I/O Expansion modules are required. These expansion modules are mounted on the DIN rail either to the left or right of the SCADAPack and are connected to the PLC through Inter-Module-Communication (IMC) cables. IMC cables pass 5V power and I/O communication signals from the PLC to the expansion modules. Refer to the following diagram.
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