Product Overview
The Honeywell 8C-TDILA1, supplied under the complete part number 51307141-175, is the Digital Input 24 VDC IOTA (Input Output Termination Assembly) in Honeywell’s Series 8 I/O architecture, serving the Experion PKS, Experion LX, and PlantCruise platforms built around the C300 controller. As the passive termination layer of the digital input chain, this board provides the field-wiring interface for thirty-two discrete 24 VDC channels and pairs with the 8C-PDILA1 Series 8 digital input IOM, which performs the actual signal sensing and delivery to the controller. Field contacts, proximity switches, relay outputs, status signals, limit switches, and other dry 24 VDC devices terminate directly onto the 8C-TDILA1, giving the C300 a clean, high-density point of entry for the discrete signals that drive interlocks, permissives, motor status, and sequence logic.
The “8C-” prefix on the model designation denotes Honeywell’s G3 conformal coating rating per ISA S71.04, meaning the PCB is protected against the corrosive-gas atmospheres found in refineries, offshore platforms, wastewater plants, and pulp and paper facilities where uncoated electronics degrade within months. The board mounts into the 9-inch IOTA baseplate position of a Series 8 cabinet and, together with its paired IOM, supports hot-swap removal and insertion under power so that failed hardware can be replaced during live production without disturbing adjacent loops or shutting down the controller.
Positioned within Honeywell’s current-generation distributed control architecture, the Honeywell 8C-TDILA1 is an actively deployed, factory-supported component rather than an obsolete spare. As the Experion Series 8 installed base continues to expand across power generation, oil and gas, chemicals, and pharmaceuticals, digital input density remains one of the largest single categories of I/O in any DCS cabinet, and maintaining verified spares of the 51307141-175 protects process availability in applications where discrete signal integrity is directly tied to operational safety and production continuity.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 8C-TDILA1 |
| Part Number | 51307141-175 |
| Manufacturer | Honeywell |
| Product Type | Digital Input IOTA (Input Output Termination Assembly), DI 24V, Coated |
| System Platform | Honeywell Experion PKS / Experion LX / PlantCruise, Series 8 I/O with C300 Controller |
| Companion IOM | 8C-PDILA1 (Series 8 DI 24V, 32 channels) |
| Channel Capacity | 32 digital input channels |
| Input Signal | 24 VDC discrete signals (dry contact / sinking sensing) |
| Voltage Rating | 24 VDC |
| Input Scan Rate | 50 ms |
| SOE Resolution | 1 ms (digital input Sequence of Events, when paired with SOE-capable IOM) |
| Mounting Size | 9-inch IOTA (228 mm) |
| PCB Coating | Conformal coated, G3 corrosive gas rating per ISA S71.04 |
| Environmental Rating | 0–50 °C external / 0–60 °C internal; 5–95% RH non-condensing |
| Certifications | CSA Class I Div 2 Grp ABCD; ATEX / IECEx Zone 2 Ex ec IIC T4 Gc; CE, FCC, RoHS |
| Dimensions | Approx. 228 mm (9-inch IOTA width) |
| Weight | Approx. 0.45–0.56 kg |
| Mounting / Service | Series 8 IOTA baseplate; hot-swap removal and insertion under power |
