Product Overview

The Honeywell 8C-TDILA1​ (order number 51307141-175) is a high-density, non-redundant 32-channel 24V DC digital input IOTA (Input/Output Transition Assembly) module belonging to Honeywell’s renowned Experion PKS Series 8 distributed control system platform. Designed as a baseplate-integrated IOTA module, the Honeywell 8C-TDILA1​ serves as the critical signal acquisition interface between field-level discrete devices—such as limit switches, pushbuttons, relay contacts, solenoid feedback, and proximity sensors—and the C300 controller within an Experion PKS automation architecture. The “8C” prefix denotes the G3 conformal coating variant engineered for corrosive industrial atmospheres, while the “TDILA1” designation identifies this module as a non-redundant digital input IOTA with 32 input channels. As a foundational building block of the Series 8 I/O family, the Honeywell 8C-TDILA1​ delivers exceptional reliability for process monitoring, equipment status acquisition, and safety interlock detection across the most demanding automation environments.Functionally, the Honeywell 8C-TDILA1​ accepts 24V DC discrete signals as digital inputs, supporting both dry contact and voltage input types with comprehensive signal conditioning. The module offers three selectable operating modes to match application requirements: Normal mode with 20ms PV scan for conventional switch acquisition, SOE (Sequence of Events) mode providing 1ms resolution event timestamping alongside 20ms PV scan for fault retrospective analysis, and Low Latency mode with 5ms PV scan for high-speed process control. Each of the 32 input channels is galvanically isolated from the system backplane at 1000V AC RMS or ±1000V DC through optical isolation techniques implemented in the associated IOM (Input/Output Module), effectively preventing ground loops and electromagnetic interference from compromising signal integrity. The Honeywell 8C-TDILA1​ supports internal or external field power selection, with onboard excitation power eliminating the need for separate marshalling power supplies—a significant cabinet space and wiring cost advantage.Physically, the Honeywell 8C-TDILA1​ is built on a 9-inch IOTA baseplate format, consuming just 95mA module current while operating on 18-30V DC field power. The module supports removal and insertion under power (hot-swappable), enabling maintenance without process interruption—a critical capability for continuous-operation process plants. Certified for Class I, Division 2, Groups A/B/C/D, T4 and Class I, Zone 2 AEx/Ex nA II C T4 hazardous area installations, the Honeywell 8C-TDILA1​ has become the trusted digital input solution for refineries, petrochemical facilities, power generation auxiliaries, pharmaceutical process skids, and offshore platform automation. With extensive built-in self-diagnostics for data integrity monitoring, direct/reverse input indication, and seamless integration into redundant Series 8 I/O racks, the Honeywell 8C-TDILA1​ continues to serve as the workhorse digital input module sustaining operational continuity across thousands of installed Experion PKS systems worldwide.

Technical Specifications