ABB NKTU01-20 Symphony Harmony INFI 90 I/O Module to Terminal Unit Cable

Description

The NKTU01-20 is a prefabricated electrical conduit assembly designed for industrial distributed control systems. This I/O Module to Terminal Unit Cable provides dedicated signal connectivity between control I/O modules and their corresponding terminal units (TU), specifically within the Symphony Harmony INFI 90 and Symphony Plus Harmony Rack (S+ HR) architectures. Featuring a pre-engineered length of 20 Ft and a robust PVC outer jacket, the cable enables secure, plug-and-play transmission of control loop data. It is factory-terminated with integrated connectors optimized for low-voltage signal logic applications not exceeding 1000 V, preventing wiring errors and field termination delays in demanding industrial processing environments.

Features

• Pre-terminated cable assembly ensuring rapid, error-free integration between system modules.
• 20-foot physical layout engineered for extended routing paths across separate cabinet logic rows.
• Protective PVC insulation jacket offering resistance against typical industrial cabinet wear.
• Native compatibility with S+ HR I/O assemblies and NTMF01 terminal unit configurations.
• Factory-fitted termination connectors designed for consistent contact integrity below 1000 V.

Applications

• Signal bridging between internal DCS I/O modules and external field terminal units.
• Extended intra-cabinet and inter-rack control logic communication paths.
• Process automation environments utilizing Symphony Harmony and Symphony Plus rack systems.

Technical Specifications

Environmental

Installation Guidelines

• Cable Routing: Avoid tight bends that exceed the maximum specified mechanical radius of the PVC jacket. Ensure the data cable path is physically isolated or shielded from heavy AC power cables to protect against electromagnetic disturbance.
• Connector Engagement: Push the integrated termination interfaces firmly into the designated slots on the I/O module and the NTMF01 terminal unit until fully locked. Verify the seating security to maintain low circuit resistance.
• Environmental Considerations: Position the assembly away from high thermal radiation areas inside the enclosure to keep the operating environment stable.