ABB INNIS21 is an INFI-NET network interface module for Bailey INFI 90 and Harmony Rack communication architectures. In a process control unit, it provides the network-facing interface while the associated network processing module performs the companion processing role.
- Function: INFI-NET to node communication interface
- Documented companion: INNPM22 in the newer process control unit architecture
- Network termination context: NTCL01 in ABB evolution diagrams
- Network media context: Project-dependent twinaxial or coaxial cabling through the documented termination architecture
ABB documents INNIS21 with INNPM22 in the newer process-control-unit communication generation. ABB describes these modules as providing increased performance and capacity while remaining form, fit, and functional replacements for preceding communication-module generations. System evolution material shows INNIS21 connected through NTCL01 network termination hardware, with project-dependent twinaxial or coaxial network cabling. The exact installed network medium, cable, node addressing, redundancy, and firmware must be taken from the site design. INNIS21 moves exception-report and system communication traffic between an INFI-NET network and its node; it does not execute plant control strategy by itself. Replacement must be coordinated with the companion INNPM22 or installed processor, network health, node configuration, and commissioning plan.
Important Notice: Confirm INNIS21 rather than INNIS01, INNIS11, INNPM22, INICT13, or INIET800.
Apter Power INNIS21 Manuals and Guides
Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.
Process control unit networking
Provides the INFI-NET interface for a control-system node working with its documented processing companion.
Peer and system data exchange
Carries node communication and exception-report traffic within the installed ABB network architecture.
Legacy communication maintenance
Supports installed INFI-NET systems where node identity, media, termination, and firmware must be preserved.
Communication evolution projects
Supports engineered replacement of earlier NIS generations or migration toward newer ABB network interfaces after topology review.
Read and follow the current ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1
Back up node configuration, addresses, firmware records, network maps, and redundancy settings before service.
2
Confirm INNIS21 identity and the exact companion processor; do not interchange INNIS and INNPM roles.
3
Verify NTCL01, cable type, connectors, shields, termination, node address, and network medium from approved drawings.
4
Coordinate removal with the control-room and network owner because a communication interruption can affect multiple controllers and operator functions.
5
Follow ABB and site ESD, isolation, insertion/removal, fiber/copper handling, and commissioning procedures as applicable.
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