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ABB IEMMU01 is a legacy module mounting unit used to mechanically support and interconnect compatible INFI 90 rack modules inside the control cabinet.
ABB IEMMU01 provides the configured mounting and backplane interface for the installed module group. Its role is cabinet hardware integration rather than process-control execution.
Verify slot use, backplane connections, power distribution, bus cabling, cabinet clearance and grounding before replacement. ABB documents IEMMU21-KIT as the module-mounting component used with current MPS III power-system upgrades.