Technical Specifications Model: INNIS21 Local Bus Interface: Symphony Controlway bus Plant‑loop Network Interface: INFI‑90 plant‑loop communication interface Back‑plane Power Supply: +5 VDC from rack back‑plane Operating Temperature: 0 ℃ to +60 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE, UL
Functional Features Realizes data‑exchange interface between local PCU Controlway bus and plant‑wide INFI‑90 plant‑loop network. Completes receiving and forwarding of cross‑unit process‑data, control‑commands and alarm‑event messages on plant‑loop network. Front‑panel LED indicators display module power‑on, running, Controlway bus status and plant‑loop network communication status. On‑board self‑diagnosis monitors back‑plane power supply, local bus abnormality and plant‑loop network link fault. Supports authorized hot‑swap under system maintenance workflow.
Application Scenarios Spare‑part replacement for INNIS21 plant‑loop interface module in Symphony DCS PCU rack. Network interface hardware for each process control unit accessing plant‑wide INFI‑90 plant‑loop communication network. Maintenance renewal for legacy large‑scale Symphony DCS multi‑unit network communication hardware.
Installation Requirements Insert INNIS21 fully into target MMU rack slot of process control unit and fasten front locking screw. Complete plant‑loop network signal‑cable wiring to corresponding network terminal interface. Implement protective earthing complying with DCS system grounding specification. Reserve ventilation heat‑dissipation clearance around module slot. Ambient operating temperature shall keep within 0 ℃ ~ +60 ℃ without condensation. Verify plant‑loop network communication and cross‑unit data‑exchange function after hardware installation completion.
Usage Notes Plant‑loop network signal cables adopt dedicated shielded cables complying with ABB INFI‑90 installation specification.
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