Kongsberg NA-1E Series Modules

Technical Dossier

Product Details And Specifications

Kongsberg NA-1E Series: Comprehensive Module Range and Technical Overview

The Kongsberg NA-1E Series represents a foundational control system platform deployed extensively across global heavy industry — including offshore oil & gas platforms, petrochemical refineries, pulp & paper mills, and marine automation systems. Developed by Kongsberg (formerly Norsk Data / Kongsberg Offshore), the NA-1E architecture established a modular, rack-based distributed control philosophy that allowed plant operators to configure bespoke I/O and processing topologies without full system replacement. Installed base units remain operational in facilities across Norway, the UK North Sea, Southeast Asia, and the Gulf of Mexico, making long-term spare parts availability a critical operational concern for maintenance engineers and procurement managers worldwide.

The Evolution of NA-1E Series Architecture

The NA-1E platform was introduced as part of Kongsberg's industrial automation expansion in the 1980s, designed to bridge analog field instrumentation with early digital supervisory control. The architecture is built around a passive backplane bus that supports hot-swap module insertion — a significant engineering advantage for continuous-process industries where unplanned shutdowns carry substantial financial penalties.

Early NA-1E deployments used dedicated point-to-point wiring between field devices and I/O cards. As the platform matured through the late 1990s, Kongsberg introduced enhanced communication adapters supporting HART and Modbus RTU overlays, extending the useful life of existing hardware. The series entered its maintenance phase in the 2000s following Kongsberg's transition to the K-Spice and SAS (Safety Automation System) platforms. However, the NA-1E installed base is extensive enough that OEM-equivalent spare parts and refurbished modules remain in active commercial demand.

Compatibility note: NA-1E modules are not electrically interchangeable with the later NA-2E or Kongsberg Maritime K-Chief series. Procurement teams must verify rack slot assignments and backplane revision levels before substituting modules.

NA-1E Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the most commonly sourced modules within the NA-1E platform. Each entry includes a concise functional descriptor to support accurate requisition and cross-referencing.

NA-1E221: Panel card; operator interface display and alarm annunciation module.
NA-1E101: Analog input module; 8-channel, 4–20 mA signal conditioning.
NA-1E102: Analog input module; 16-channel, thermocouple/RTD multi-type input.
NA-1E111: Analog output module; 8-channel, 4–20 mA isolated current output.
NA-1E201: Digital input module; 32-channel, 24 VDC discrete signal acquisition.
NA-1E202: Digital input module; 16-channel, 110 VAC field voltage compatible.
NA-1E211: Digital output module; 16-channel, relay contact output, 2A rated.
NA-1E212: Digital output module; 32-channel, transistor sink output, 24 VDC.
NA-1E301: CPU / controller module; primary process execution unit, single-loop.
NA-1E302: CPU module; redundant controller configuration, hot-standby capable.
NA-1E401: Power supply module; 24 VDC rack power, 10A continuous output.
NA-1E402: Power supply module; redundant PSU, auto-failover, 24 VDC / 20A.
NA-1E501: Communication adapter; RS-232/RS-485 serial interface, Modbus RTU.
NA-1E502: Communication adapter; HART pass-through multiplexer, 8-channel.
NA-1E601: Backplane / rack chassis; 12-slot passive bus, standard NA-1E form factor.
NA-1E602: Backplane / rack chassis; 6-slot compact configuration, panel-mount.
NA-1E701: Termination board; field wiring marshalling, screw terminal, 32-point.

Sourcing Hard-to-Find & Obsolete NA-1E Series Parts

The NA-1E Series has been formally discontinued by Kongsberg, with OEM factory support withdrawn. This creates a well-documented procurement challenge: plant operators running continuous processes cannot simply upgrade to a modern DCS without a capital project approval cycle that may span 18–36 months. In the interim, maintaining operational spare parts inventory is the only viable risk mitigation strategy.

DriveKNMS maintains an active sourcing network for NA-1E modules through three channels: (1) decommissioned plant asset recovery from North Sea and Asia-Pacific facilities, (2) authorized surplus distributor relationships in Europe and North America, and (3) refurbishment of functional pull-out units with full electrical testing and 12-month warranty coverage. All units are supplied with traceable documentation suitable for regulatory audit — including CE declarations where applicable and export compliance records for cross-border shipment.

For procurement teams managing multi-site operations, DriveKNMS can provide blanket order agreements with reserved stock allocation, reducing lead time risk for critical spare categories such as CPU modules and power supplies.

Quality Control for the NA-1E Series Range

The NA-1E backplane bus architecture presents specific testing challenges that generic electronics refurbishers are not equipped to address. DriveKNMS applies a structured QC protocol tailored to this platform:

Backplane bus integrity test: Each module is seated in a reference NA-1E rack and subjected to full bus communication cycling to verify address decoding and data line integrity. Intermittent backplane faults — a common failure mode in aged units — are identified and rejected at this stage.

Analog channel calibration: All AI and AO modules are calibrated against NIST-traceable reference standards. 4–20 mA linearity, zero offset, and span accuracy are verified across the full operating temperature range (0–55°C).

Digital I/O functional test: DI modules are tested for input threshold voltage accuracy; DO relay modules undergo contact resistance measurement and rated-load switching endurance cycles.

Power supply load test: PSU modules are tested at 100% rated load for a minimum of 2 hours with output voltage ripple and regulation measurements recorded.

Final inspection: All modules are cleaned, visually inspected for PCB damage, capacitor condition, and connector integrity before packaging in anti-static ESD-safe materials with desiccant.