Honeywell HKL Series Modules: HKL-1000M

Technical Dossier

Product Details And Specifications

Honeywell HKL Series Technical Notes

The Honeywell HKL series represents a line of distributed control system (DCS) I/O and communication modules deployed extensively across global heavy industry verticals, including petrochemical refineries, nuclear power generation facilities, offshore platforms, and large-scale chemical processing plants. These modules operate within Honeywell's broader TDC/TPS and Experion PKS control architectures, providing field-hardened signal conditioning, digital I/O, and bus communication functions in environments where continuous uptime is a regulatory and operational requirement. Installed base counts for HKL-series hardware run into the tens of thousands of nodes globally, making long-term spare parts availability a critical supply chain concern for plant maintenance engineers and reliability teams.

The Evolution of HKL Series Architecture

The HKL module family was introduced as part of Honeywell's modular I/O expansion strategy for mid-to-large DCS installations. Early-generation HKL hardware was designed for backplane-mounted deployment within standard 19-inch rack enclosures, communicating over proprietary Honeywell data highways (Data Hiway, UCN) before transitioning to Fault-Tolerant Ethernet (FTE) in later Experion PKS-era revisions. The series spans multiple hardware generations: first-generation modules used parallel backplane buses with fixed addressing; second-generation units introduced configurable node addressing and hot-swap capability; third-generation variants added diagnostics registers accessible via HART pass-through and OPC-UA endpoints. Compatibility between generations requires careful firmware version matching — mixing G1 and G3 modules on the same backplane without firmware alignment is a documented source of intermittent bus faults. Replacement planning must account for the module's generation, firmware revision, and the specific Experion R-release (R310 through R520+) running on the associated C300/C200 controllers.

HKL Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked HKL-series and directly associated Honeywell DCS module part numbers. Each entry reflects the module's primary functional classification:

Analog Input (AI) Modules

• HKL-1000M: 16-channel analog input module, 4–20 mA HART-enabled, backplane-mounted
• HKL-1001: 8-channel AI module, thermocouple/RTD input, isolated, DIN-rail compatible
• HKL-1002: 16-channel AI, voltage input (±10 V / 0–5 V), high-speed scan rate variant
• HKL-1004: 8-channel AI, millivolt input, for strain gauge and load cell applications
• HKL-1008: 32-channel AI multiplexed input module, reduced-cost high-density configuration

Analog Output (AO) Modules

• HKL-2001: 8-channel AO module, 4–20 mA current output, HART pass-through capable
• HKL-2002: 4-channel AO, voltage output (0–10 V), for valve positioner and actuator control
• HKL-2004: 8-channel AO, isolated outputs, SIL 2 rated for safety instrumented systems

Digital Input (DI) Modules

• HKL-3001: 32-channel DI module, 24 VDC, dry contact and wet contact configurable
• HKL-3002: 16-channel DI, 120 VAC input, for legacy field device integration
• HKL-3004: 64-channel DI, high-density, for large motor control center (MCC) monitoring

Digital Output (DO) Modules

• HKL-4001: 16-channel DO module, 24 VDC sourcing, 0.5 A per channel
• HKL-4002: 8-channel DO, relay output, SPDT, 2 A at 250 VAC
• HKL-4004: 32-channel DO, transistor output, for high-speed discrete control applications

Communication & Specialty Modules

• HKL-5001: PROFIBUS DP communication adapter, master/slave configurable, up to 12 Mbps
• HKL-5002: Modbus RTU/TCP gateway module, for third-party device integration
• HKL-6001: Redundant power supply module, 24 VDC, hot-swap, for critical backplane configurations