The ABB NKDO01-2, also cataloged as the NKDO01 Digital Output Cable, operates as a dedicated hardware component for 16 solid-state relay output signal transmission within ABB Bailey Infi 90 DCS platforms. It provides direct physical interconnections between NTDO02 termination units to route discrete digital logic signals from Digital Output Modules (DSO) across system racks.

Part Number Nomenclature Breakdown

• NKDO: Dedicated digital output interconnect cable assembly for Infi 90 termination architectures.
• 01: Design generation and pinout routing standard for solid-state relay output termination units.
• 2: Cable length designation representing 2 feet (0.61 meters).

Engineering & Electrical Specifications

Deterministic Routing & Backplane Compatibility

The NKDO01-2 cable facilitates high-integrity discrete routing without affecting backplane bus communication velocity or backplane signal integrity. Designed for compatibility with DCS termination units, the assembly supports stable I/O density scaling while maintaining galvanic isolation thresholds up to 1500 V AC between field circuits and system backplanes. Firmware flash compatibility on connected modules remains completely unhindered by this passive wiring interface.

Standard Package Contents

• 1 x ABB NKDO01-2 Cable Assembly (2 ft / 0.61 m)
• 2 x Integrated Connector Strain Relief Boot Clamps

Cable Routing & Installation Rules

Connector Assembly Protocol

• Align keyed connector housings with the matching receptacles on the NTDO02 termination units.
• Press connectors firmly until locking latches fully engage to prevent accidental disconnects from cabinet vibration.

Cabinet Wiring Guidelines

• Maintain a minimum bend radius of 50 mm during cable dress within the mounting rack.
• Route the output cable away from high-voltage AC power lines and variable frequency drive leads to prevent electromagnetic noise induction.

Frequently Asked Questions

• What is the primary function of the NKDO01-2 cable in an Infi 90 DCS system?

  It interconnects NTDO02 termination units to carry 16 solid-state relay digital output signals for a DSO module.

• What is the current capacity per conductor on the NKDO01-2 assembly?

  Each individual conductor is rated for a continuous maximum current of 5 A at up to 300 V AC.

• What dielectric isolation level does this cable provide?

  The cable assembly provides a 1500 V AC isolation rating between signal paths and ambient shield earth.

• What wire gauge is utilized inside the cable sheath?

  The assembly uses multi-strand copper conductors ranging from 18 to 20 AWG.

• What ambient temperature range is allowable for continuous operation?

  The cable is rated for continuous operational service from -20 deg C to +80 deg C.

• Is this cable assembly active or passive?

  The NKDO01-2 is a fully passive wiring interconnect with zero internal active electronics or power consumption.

• How long is the NKDO01-2 cable assembly?

  The standard length specified by suffix -2 is 2 feet (0.61 meters).

• What is the recommended minimum bend radius when installing inside control cabinets?

  Observe a minimum bend radius of 50 mm to avoid conductor fatigue and insulation damage near connector strain reliefs.