ABB NICL01 Communication Link Termination Module

The ABB NICL01, also cataloged as the NICL01 Termination Module, operates as a dedicated hardware component for localized physical layer impedance matching, cable termination, and communication network routing within ABB Bailey INFI 90 distributed control system (DCS) platforms.

Hardware Specifications

Industrial Control and Backplane Bus Communications

• Backplane Bus Communication Velocity: The termination module conditions and balances differential signals across the localized INFI 90 communication loop. By maintaining exact impedance tolerances across physical wire boundaries, it enables high-speed data packets to travel between nodes at standard network velocities without signal reflection or wave distortion.
• I/O Density Scaling: The module acts as a passive concentration node for external network connection lines. It condenses multiple incoming serialization trunks down to a single physical backplane address footprint, allowing host controllers to scale system network connections without dropping active processing tasks.
• Firmware Flash Compatibility: As a hardware-level electrical termination assembly, it provides fixed physical link paths. It remains independent of software updates, but its electrical bus layout must match the hardware revision settings of the connected communication interface modules to ensure error-free data routing.

Frequently Asked Questions

Q: What is the main engineering function of the NICL01 within an INFI 90 communication link network?

A: The NICL01 provides the required physical and electrical endpoints for the twinaxial or shielded twisted-pair communication lines used by INFI 90 modules. It integrates precise internal resistor networks that match the characteristic impedance of the transmission lines, suppressing wave reflections that can corrupt high-frequency digital data registers.

Q: What are the installation consequences to the wider communication loop if the termination module grounding path is broken?

A: A broken or high-resistance grounding link on the termination module leaves the cable shielding ungrounded. This allows external electromagnetic interference and radio frequency noise to inject stray currents directly into the communication lines, causing data packet timeouts, parity errors, and potential drops in network synchronization between control nodes.