Emerson DeltaV KJ3002X1-BG2 12P1731X032 Thermocouple Input Module

Technical Dossier

Product Details And Specifications

Emerson DeltaV KJ3002 Series Technical Notes

The Evolution of KJ3002 Architecture

The KJ3002 module line was introduced alongside the original DeltaV platform release (v1.x, circa 1996–1998) as part of Emerson's strategy to deliver a fully digital, fieldbus-ready DCS with native I/O modularity. Early hardware revisions (suffix -BA1, -BB1) used through-hole PCB construction and supported 8-channel thermocouple input with HART pass-through capability on select variants. The transition to surface-mount technology in the -BG1 and -BG2 revisions (mid-2000s) improved EMI immunity and reduced power consumption. The 12P1731X032 assembly designation identifies the specific PCB assembly revision within the BG2 hardware generation, indicating a mature, field-proven build state.

Compatibility considerations are significant for maintenance teams: BG1 and BG2 hardware revisions are generally interchangeable at the module slot level within the same DeltaV version, but firmware compatibility must be verified against the site's DeltaV system version (v7.x through v14.x). Modules running DeltaV v13.3 and above may require updated module firmware loaded via the DeltaV Explorer. Sites still operating DeltaV v6.x or earlier face the most acute obsolescence risk, as Emerson's lifecycle support for those system versions has ended, making certified refurbished spare modules the primary maintenance path.

KJ3002 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified KJ3002 series module population. Each entry identifies the hardware revision suffix and primary functional characteristic. All models mount to standard DeltaV 2-wide or 8-wide carrier assemblies.

Thermocouple Input Modules (TC AI):

• KJ3002X1-BA1: 8-ch TC input module, early hardware rev, through-hole PCB, DeltaV v1–v6 compatible
• KJ3002X1-BB1: 8-ch TC input, revised analog front-end, improved CJC accuracy ±0.5°C
• KJ3002X1-BC1: 8-ch TC input, enhanced EMI filtering, supports J/K/T/E/R/S/B/N thermocouple types
• KJ3002X1-BD1: 8-ch TC input, SMT transition revision, reduced module power draw to 1.8W typical
• KJ3002X1-BE1: 8-ch TC input, updated backplane communication ASIC, DeltaV v7+ required
• KJ3002X1-BF1: 8-ch TC input, conformal coating standard, rated for high-humidity environments
• KJ3002X1-BG1: 8-ch TC input, full SMT construction, integrated diagnostics, DeltaV v9+ compatible
• KJ3002X1-BG2 12P1731X032: 8-ch TC input, current production BG2 PCB assembly rev, enhanced open-circuit detection, DeltaV v9–v14 compatible — this listing
• KJ3002X1-BG2 12P1731X042: 8-ch TC input, BG2 alternate PCB assembly rev, functionally equivalent to X032 build state
• KJ3002X1-BH1: 8-ch TC input, latest hardware revision, supports DeltaV v13.3 advanced diagnostics

Associated Carrier & Termination Assemblies:

• KJ3002X1-CA1: 2-wide vertical carrier for KJ3002 modules, standard DIN rail mount
• KJ3002X1-CB1: 8-wide horizontal carrier assembly, supports mixed KJ-series I/O population
• KJ3001X1-BG2: 8-ch RTD/resistance input module, direct functional complement to KJ3002 in temperature measurement applications
• KJ3003X1-BG2: 8-ch mV/TC input, extended millivolt range variant for non-standard sensor types
• KJ3221X1-BG2: 8-ch AI 4–20mA input module, same carrier-compatible form factor, used in mixed I/O marshalling panels alongside KJ3002
• KJ3222X1-BG2: 8-ch AO 4–20mA output module, paired with KJ3002 in temperature control loops

Quality Control for the KJ3002 Range

Each KJ3002 module processed by DriveKNMS undergoes a structured inspection and functional test protocol specific to the DeltaV backplane communication architecture and analog signal chain:

• Visual inspection: PCB examination for corrosion, capacitor bulge, solder joint integrity, and connector pin condition on the 96-pin DIN backplane connector
• Backplane communication test: Module is seated in a live DeltaV test carrier and recognized by a DeltaV controller running v9.3 or v11.3; module identity, firmware version, and hardware revision are logged
• Analog channel verification: All 8 TC input channels are stimulated with a calibrated thermocouple simulator (Fluke 724 or equivalent) across J, K, and T types; measured values are compared against reference within ±1°C
• CJC accuracy check: Cold-junction compensation circuit is verified at ambient temperature against a calibrated reference thermometer
• Open-circuit detection test: Each channel is tested for correct open-circuit fault annunciation to the DeltaV controller
• Power consumption measurement: Module current draw is measured and compared against Emerson specification (nominal 1.8W for BG2 revision)
• Burn-in: Modules are powered continuously for a minimum of 24 hours prior to shipment