Description
The Honeywell 8C-TDILA1 (Order Number: 51307141-175) is a high-density, non-redundant 32-channel 24V DC digital input IOTA (Input/Output Termination Assembly) module purpose-built for the Honeywell Experion PKS Series 8 distributed control system platform. 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.
Application Scenarios
In a Gulf Coast refinery’s fluid catalytic cracking unit, the existing discrete input monitoring system was plagued by nuisance trips caused by electromagnetic interference from nearby high-voltage switchgear. The maintenance team replaced the aging I/O with the Honeywell 8C-TDILA1, leveraging its optical isolation (1000V AC RMS) and software-configurable signal filtering to eliminate false triggers from valve limit switches and emergency shutdown buttons. The Honeywell 8C-TDILA1’s onboard excitation power eliminated the need for separate marshalling power supplies, simplifying the cabinet wiring and reducing installation time by over 30%. Since the retrofit, the unit has operated continuously for 18 months without a single spurious trip, demonstrating the ‘s ability to address the critical pain points of signal integrity and system simplification in harsh refining environments. For engineers dealing with legacy TDC 3000 or TPS system upgrades, the provides a direct, drop-in replacement path to modernize discrete input acquisition without a full system overhaul.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | (Order No. 51307141-175) |
| Manufacturer | Honeywell International Inc. |
| Product Category | Digital Input IOTA Module (Baseplate-Integrated) |
| Input Channels | 32 digital input channels |
| Input Voltage Rating | 24V DC nominal |
| DI Power Voltage Range | 18–30V DC (user-supplied or onboard field power) |
| Module Current Rating | 95 mA |
| ON Sense Voltage/Current | 13V DC (min) or 3mA (min) |
| OFF Sense Voltage/Current | 5V DC (max) or 1.2mA (max) |
| Input Impedance | 4.2 kΩ |
| Absolute Delay (Filter + Isolation) | 5 ms ± 20% |
| Galvanic Isolation | 1000V AC RMS / ±1500V DC (input to system) |
| Operating Temperature | -20°C to +70°C (industrial range) |
| Certifications | UL, CE, RoHS, Class I Div 2 / Zone 2 |
| Dimensions | 9-inch IOTA form factor |
| Mounting | Series 8 I/O rack / chassis |