Honeywell SSD Series Modules

Technical Dossier

Product Details And Specifications

Honeywell SSD Series: Comprehensive Module Range and Technical Overview

The Honeywell SSD (Safety System Display) series represents a critical tier of I/O and controller modules deployed across global heavy-industry installations, including petrochemical refineries, nuclear power facilities, offshore platforms, and large-scale chemical processing plants. Engineered under Honeywell's TotalPlant Solution (TPS) and Experion PKS architecture frameworks, SSD-series modules are characterized by deterministic scan cycles, redundant backplane communication, and compliance with IEC 61511 functional safety standards. Their installed base spans facilities in North America, the Middle East, and Southeast Asia, where replacement cycles are measured in decades rather than years.

The Evolution of SSD Architecture

The SSD series originated within Honeywell's Safety Manager and TPS ecosystem in the late 1990s as a response to the industry's demand for integrated safety and process control on a unified backplane. Early-generation modules (circa 1998–2005) used parallel bus communication with fixed-address slot assignment, limiting hot-swap capability. The mid-generation transition (2005–2012) introduced Universal Control Network (UCN) compatibility and expanded the I/O density per slot, reducing panel footprint in brownfield retrofits. Post-2012 variants incorporated HART pass-through on analog channels and improved diagnostics via the Honeywell FDM (Field Device Manager) interface.

As of 2026, the SSD series is classified as a mature/end-of-active-production line. Honeywell continues to provide lifecycle support under its Installed Base Assurance (IBA) program, but new production runs are limited. Facilities relying on SSD infrastructure must maintain strategic spare inventories or engage specialist distributors for long-term maintenance continuity. Migration paths to Experion PKS C300 controllers and Safety Manager SC are available but require full I/O rewiring and configuration migration — a multi-year capital project for most sites. The SSD installed base therefore remains in active service well into the 2030s at the majority of brownfield facilities.

SSD Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the Honeywell SSD series. Each entry reflects the module's primary functional role within a TPS or Experion PKS cabinet.

Digital Output (DO) Modules

• SSD-D08G-4300 (51403645-400): 8-ch DO, 24 VDC solid-state, group-isolated, discrete actuator control.
• SSD-D08G-4200 (51403645-200): 8-ch DO, earlier revision, non-CE-marked, legacy panel compatibility.
• SSD-D16G-4300 (51403646-400): 16-ch DO, high-density, dual-slot form factor, 24 VDC.
• SSD-D16G-4200 (51403646-200): 16-ch DO, prior revision, pre-2008 TPS cabinet deployment.

Digital Input (DI) Modules

• SSD-D08H-4300 (51403647-400): 8-ch DI, 24 VDC, high-impedance, field-powered, group-isolated.
• SSD-D16H-4300 (51403648-400): 16-ch DI, high-density, dual-slot, 24 VDC field power.
• SSD-D16H-4200 (51403648-200): 16-ch DI, legacy revision, original SSD backplane compatible.

Analog Output (AO) Modules

• SSD-A08H-4300 (51403649-400): 8-ch AO, 4–20 mA, HART-enabled, 16-bit resolution, loop-powered.
• SSD-A08H-4200 (51403649-200): 8-ch AO, non-HART, pre-HART field network deployment.
• SSD-A04H-4300 (51403650-400): 4-ch AO, 4–20 mA, HART pass-through, high-accuracy calibration.

Analog Input (AI) Modules

• SSD-A08G-4300 (51403651-400): 8-ch AI, 4–20 mA / 1–5 VDC selectable, HART, 16-bit ADC.
• SSD-A16G-4300 (51403652-400): 16-ch AI, high-density, dual-slot, HART multiplexed.
• SSD-A16G-4200 (51403652-200): 16-ch AI, non-HART revision, legacy field wiring compatible.

Power Supply & Communication Modules

• SSD-PS24-4300 (51403660-400): 24 VDC redundant PSU, 10 A output, hot-swap capable, LED diagnostics.
• SSD-CM01-4300 (51403670-400): Communication adapter, UCN interface, redundant network topology support.
• SSD-CM02-4300 (51403671-400): Secondary comm module, FTE (Fault Tolerant Ethernet) interface, Experion PKS integration.
• SSD-CPU01-4300 (51403680-400): Controller processing unit, dual-redundant CPU, 256 MB application memory, IEC 61131-3 compliant.
• SSD-CPU01-4200 (51403680-200): CPU module, prior revision, 128 MB memory, compatible with early SSD backplane generations.

Sourcing Hard-to-Find & Obsolete SSD Parts

DriveKNMS maintains a dedicated inventory program for Honeywell SSD series modules that have exited active Honeywell production. Our sourcing methodology covers three channels: (1) decommissioned plant buybacks, where complete SSD cabinets are acquired, tested, and disaggregated into individual certified spares; (2) authorized surplus networks across North America, Europe, and Asia-Pacific; and (3) cross-reference matching, where discontinued part numbers are mapped to their functional equivalents within the Experion PKS C300 or Safety Manager SM series for customers evaluating migration paths.

All obsolete SSD modules sourced by DriveKNMS are subject to the same incoming inspection protocol as new-production stock. Customers requiring long-term supply agreements (LTSAs) for SSD spares can contact our technical team to establish a managed inventory program with guaranteed response SLAs. Given the SSD series' mature lifecycle status, early engagement with a specialist distributor is the primary risk mitigation strategy for plant reliability managers.

Quality Control for the SSD Range

SSD-series modules present specific test challenges due to their multi-layer backplane bus architecture and mixed analog/digital signal paths. DriveKNMS applies the following verification procedures to all SSD inventory:

• Backplane continuity test: Each module is seated in a live SSD test rack; backplane communication integrity is verified at the UCN/FTE protocol layer.
• Channel-level functional test: All I/O channels are exercised at rated signal levels (4–20 mA for analog, 24 VDC for digital) with pass/fail logged per channel.
• HART communication verification: For HART-enabled analog modules, DD (Device Description) handshake is confirmed using a Fluke 754 or equivalent calibrator.
• Firmware revision audit: Module firmware is read and documented; modules with known errata revisions are flagged and quarantined pending customer approval.
• Thermal burn-in: Modules are operated at 45°C for 48 hours to screen for latent component failures before dispatch.