Honeywell DC-T Series Modules: DC-TDIL01

Technical Dossier

Product Details And Specifications

Honeywell DC-T Series Technical Notes

The Honeywell DC-T Series represents a core I/O and control module family within Honeywell's TotalPlant Solution (TPS) and TDC 3000 Distributed Control System (DCS) architecture. Deployed extensively across global heavy industry — including petrochemical refineries, nuclear power facilities, offshore platforms, and large-scale chemical processing plants — the DC-T Series has established a long-term installed base that continues to require active spare parts support. These modules interface directly with the Universal Control Network (UCN) and Local Control Network (LCN), providing deterministic process control in safety-critical environments. The series covers digital input, digital output, analog input, analog output, and specialty communication functions, making it one of the most complete I/O families in the TPS ecosystem.

The Evolution of DC-T Series Architecture

The DC-T Series was introduced as part of Honeywell's transition from the original TDC 2000 platform toward the more scalable TDC 3000 and TPS environments during the late 1980s and through the 1990s. Early modules in this family were designed around parallel backplane communication, with tight integration into the High-Performance Process Manager (HPM) and Advanced Process Manager (APM) controller nodes. As the platform matured, Honeywell introduced enhanced versions with improved noise immunity, higher channel density, and support for HART field device communication on analog I/O cards.

DC-T Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the most commonly referenced modules within the Honeywell DC-T Series. Each entry reflects a distinct functional role within the TPS/TDC 3000 I/O subsystem:

DC-TDIL01: 24 VDC digital input module, 32-channel, isolated, for HPM/APM I/O link
DC-TDIL02: 120 VAC digital input module, 16-channel, field-isolated, DIN rail compatible
DC-TDIL03: 24 VDC digital input module, 16-channel, non-isolated, standard density
DC-TDOL01: 24 VDC digital output module, 32-channel, solid-state relay output
DC-TDOL02: 120 VAC digital output module, 16-channel, triac output, isolated
DC-TDOL03: 24 VDC digital output module, 16-channel, relay contact output
DC-TAIL01: Analog input module, 16-channel, 4–20 mA, HART-capable, 12-bit resolution
DC-TAIL02: Analog input module, 8-channel, thermocouple/RTD universal input, isolated
DC-TAIL03: Analog input module, 16-channel, voltage/current configurable, non-isolated
DC-TAOL01: Analog output module, 8-channel, 4–20 mA, HART-capable, 12-bit resolution
DC-TAOL02: Analog output module, 16-channel, 4–20 mA, non-isolated, standard density
DC-TAOL03: Analog output module, 8-channel, voltage output, ±10 V configurable
DC-TPSU01: I/O subsystem power supply module, 24 VDC, redundancy-capable
DC-TPSU02: I/O subsystem power supply module, 120/240 VAC input, 24 VDC output
DC-TCOM01: I/O link communication adapter, UCN interface, for HPM node expansion
DC-TCOM02: Redundant I/O link adapter, dual-port UCN, hot-standby capable
DC-TBAS01: I/O baseplate, 8-slot, standard mounting, for DC-T series modules
DC-TBAS02: I/O baseplate, 16-slot, extended mounting, field wiring terminal integrated

Quality Control for the DC-T Series Range

The DC-T Series modules present specific testing challenges due to their backplane-dependent communication architecture and mixed analog/digital signal paths. DriveKNMS applies a structured verification protocol to all DC-T units prior to dispatch:

Backplane continuity test: All edge connector pins are verified for continuity and contact integrity using automated pin-mapping fixtures.
I/O link communication test: Modules are powered within a live TPS-compatible test rack and polled via UCN/I/O link protocol to confirm correct node addressing and data exchange.
Channel-level functional test: Each I/O channel is individually stimulated (for inputs) or loaded (for outputs) and measured against published Honeywell accuracy specifications.
HART communication verification: For HART-capable analog modules (DC-TAIL01, DC-TAOL01), HART pass-through is confirmed using a calibrated HART communicator.
Thermal burn-in: All refurbished units undergo a minimum 24-hour powered burn-in at elevated ambient temperature to screen for latent component failures.
Final inspection: Visual inspection of PCB, conformal coating integrity, and firmware label verification before packaging.