ABB NKTU01-L8 Symphony Harmony INFI 90 Shielded Communication Cable

The ABB NKTU01-L8, also cataloged as the NKTU01-L8 Shielded Communication Cable, operates as a dedicated hardware component for noise-resistant signal transmission between I/O modules and termination units within ABB Symphony Harmony INFI 90 platforms. The 8-foot shielded cable routes digital and low-voltage control signals directly across internal cabinet layouts, suppressing electromagnetic interference (EMI) and maintaining physical link integrity without signal degradation.

Hardware Specifications

Deterministic Network Routing & Communication Integrity

The ABB NKTU01-L8 cable architecture maintains deterministic network routing across Symphony Harmony INFI 90 cabinet backplanes. The integrated foil and braided shielding suppress external high-frequency noise and channel-to-channel cross-talk, preserving communication velocity between active I/O cards and field termination assemblies. Onboard firmware flash compatibility within connected modules ensures seamless network initialization without data frame corruption or transmission retries during execution cycles.

Frequently Asked Questions

Q: What is the recommended minimum bend radius when installing the NKTU01-L8 cable inside compact control cabinets?

A: Maintain a minimum static bend radius of 10 times the outer cable diameter to avoid damaging the internal foil shield and twisted conductor geometry.

Q: Can the pre-terminated connectors of the NKTU01-L8 be connected or disconnected while the system is powered?

A: No. Signal cables connected to Symphony Harmony INFI 90 termination units should be handled only when the respective I/O rack power is isolated to prevent accidental ground loops or module reset states.

Q: How is the cable shield terminated to handle electromagnetic interference (EMI)?

A: The outer shield terminates directly to the metallic shell of the pre-terminated connectors, establishing a low-impedance ground path to the module housing upon seating.

Field Installation Guidelines

Follow standard industrial installation steps when deploying the communication cable:

1. System Power Isolation: De-energize the host I/O rack and termination assembly power supplies before inserting or removing the cable connectors.
2. Route Isolation: Run the NKTU01-L8 through designated low-voltage control wireways. Maintain at least 300 mm separation from 480 VAC power lines and VFD output cabling to minimize EMI coupling.
3. Connector Engagement: Align the pre-terminated connector pins with the module socket. Push straight in until the locking clips engage securely.
4. Strain Relief Application: Secure the cable jacket to enclosure mounting rails using industrial cable ties within 100 mm of the connector body to reduce mechanical stress.