Emerson DeltaV KJ Series Modules: KJ2005X1-MQ1 12P6381X022

Technical Dossier

Product Details And Specifications

Emerson DeltaV KJ Series Technical Notes

The Emerson DeltaV KJ Series represents one of the most widely deployed distributed control system (DCS) module families in global heavy industry. Installed across petrochemical refineries, nuclear power facilities, LNG terminals, pharmaceutical batch plants, and offshore platforms, the KJ Series forms the I/O and controller backbone of DeltaV S-series and M-series cabinets. Its modular architecture — built around a standardized carrier and backplane bus — allows field replacement of individual I/O, controller, and communication modules without full system shutdown, a critical requirement in continuous-process environments with 99.99% uptime mandates.

The Evolution of KJ Series Architecture

The DeltaV KJ Series was introduced in the late 1990s as Emerson transitioned from the older RS3 and PROVOX DCS platforms. The initial KJ architecture used a parallel backplane bus with proprietary carrier cards, supporting up to 8 I/O modules per carrier in a standard 2/6 configuration. Early revisions (Rev A/B hardware) were limited to 4–8 mA HART pass-through and lacked advanced diagnostics.

By the mid-2000s, Emerson released enhanced KJ modules with expanded HART variable support (up to 4 HART variables per channel), improved EMI shielding, and extended operating temperature ranges (-40°C to +70°C for select models). The introduction of the Electronic Marshalling concept (CHARM I/O) in DeltaV v12 created a parallel I/O architecture, but the KJ Series remained the standard for traditional marshalled I/O cabinets and continues to be specified in brownfield expansions.

As of DeltaV v14 and v15, KJ Series modules remain fully supported in the current software stack. However, several early-generation KJ modules (pre-2005 manufacture dates) have reached hardware end-of-life, with Emerson no longer offering factory repair. This has created a significant secondary market demand for tested, refurbished KJ Series spares — a gap DriveKNMS is specifically positioned to fill.

DeltaV KJ Series Full Catalog & Functionalities (SKU List)

Controllers & Processors

• KJ2005X1-MQ1 12P6381X022: DeltaV MD-Plus Controller, dual-redundant capable, 750 DST capacity, primary CPU module for mid-to-large DeltaV nodes.
• KJ2003X1-BA1: DeltaV MD Controller, single or redundant, 100 DST capacity, standard process controller for smaller DeltaV systems.
• KJ2005X1-BA1: DeltaV MD-Plus Controller, 750 DST, non-redundant variant, used in simplex controller configurations.
• KJ2006X1-BA1: DeltaV SD Controller, SIS-rated, used in Safety Instrumented System (SIS) applications per IEC 61511.

Analog Input (AI) Modules

• KJ3001X1-BA1: 8-channel 4–20 mA HART AI module, single-ended, standard process measurement input.
• KJ3002X1-BA1: 8-channel 4–20 mA HART AI module, differential input, high-noise environment rated.
• KJ3221X1-BA1: 8-channel AI, supports thermocouple and RTD inputs, multi-sensor type selectable per channel.

Analog Output (AO) Modules

• KJ3011X1-BA1: 8-channel 4–20 mA HART AO module, standard control valve and positioner output.
• KJ3012X1-BA1: 8-channel AO, high-drive output for long cable runs and high-impedance loads.

Digital Input (DI) Modules

• KJ3101X1-BA1: 8-channel 24 VDC DI module, dry contact and wet contact selectable, standard discrete input.
• KJ3102X1-BA1: 8-channel 120 VAC DI module, for legacy field wiring at higher voltage levels.
• KJ3111X1-BA1: 32-channel 24 VDC DI module, high-density discrete input for large I/O count applications.

Digital Output (DO) Modules

• KJ3201X1-BA1: 8-channel 24 VDC DO module, sourcing output, standard solenoid valve and relay driver.
• KJ3202X1-BA1: 8-channel relay DO module, isolated contacts, for high-voltage switching applications.

Communication & Network Modules

• KJ4001X1-BA1: FOUNDATION Fieldbus H1 interface module, 2-segment, for FF field device integration.
• KJ4002X1-BA1: PROFIBUS DP master module, for integration with third-party PROFIBUS field devices and drives.
• KJ4003X1-BA1: DeviceNet scanner module, for Allen-Bradley and compatible DeviceNet device networks.

Power & Infrastructure

• KJ4009X1-BA1: DeltaV I/O carrier power supply module, 24 VDC regulated, for KJ carrier bus power distribution.

Sourcing Hard-to-Find & Obsolete KJ Series Parts

A significant portion of the global DeltaV KJ Series installed base operates on hardware manufactured between 1998 and 2010. Emerson's factory repair program has progressively sunset support for early-revision KJ modules, leaving plant operators dependent on the secondary market for like-for-like replacements during unplanned failures.

Quality Control for the KJ Series Range

KJ Series modules present specific testing challenges due to their integrated backplane communication bus and multi-channel analog signal paths. DriveKNMS applies the following verification protocol to all KJ Series units prior to dispatch: