ABB Bailey INNIS21 Network Interface Module (NIM) for INFI 90

The ABB Bailey INNIS21 is a high-performance Network Interface Module (NIM) designed for the INFI 90 and Symphony Plus distributed control systems (DCS). It acts as the communication gateway between the controller's internal functional processors and the plant-wide control network, enabling high-speed data exchange.

Key Specifications

• Model Number: INNIS21 (SPNIS21 / 6644762B1)

• Type: Network Interface Module / Communication Module

• Network Compatibility: INFI 90, NET 90, Symphony Plus (Symphony Rack / Symphony Harmony)

• Data Transfer Rate: 2 Mbps (typical Cnet speed)

• Communication Protocol: Controlway / Plant Loop / Cnet architectures

• Port Configuration: Dual redundant Cnet ports (supports fiber optic or copper cabling)

• Power Requirements: +5 VDC @ 1.1 A (5.5 W)

• Operating Temperature: 0°C to 70°C

• Mounting Unit: IEMMU11, IEMMU12, IEMMU21

• Status LEDs: Fault, Run, Network A/B for real-time diagnostics

• Redundancy: Redundant port configuration ensures continuous network connectivity and system integrity

Network Redundancy and Diagnostics

The INNIS21 module is used in conjunction with a Bridge Module (such as the INICT13 or BRC series) to interface the local bus with the plant-wide loop. It manages the formatting of messages and performs rigorous error checking to ensure data integrity. The dual redundant Cnet ports allow the system to automatically switch to a secondary communication path if the primary connection fails.

Historical Versions and Part Numbers

The INNIS21 is a component of the Bailey INFI 90 system. Earlier legacy versions may include the INNIS01 (original release) and INNIS11. For specific hardware requirements, always confirm compatibility with the Bridge module and controller rack.

Industrial Applications

Leveraged in power generation, chemical processing, pulp and paper, and metal refining plants, the INNIS21 handles high-volume data traffic between controllers, I/O modules, and HMI interfaces.

Conclusion

The ABB Bailey INNIS21 Network Interface Module is a vital component for maintaining plant visibility and control in large-scale ABB DCS environments.