Honeywell C300 Series Modules: 8C-PDOD51 51454361-174 Digital Output 24V DC Module

Technical Dossier

Product Details And Specifications

Honeywell C300 Series Technical Notes

The Honeywell C300 Controller Series, operating within the Experion Process Knowledge System (EPKS) platform, is one of the most widely deployed Distributed Control System (DCS) architectures in global heavy industry. Installed across petrochemical complexes, nuclear power facilities, crude oil refineries, LNG terminals, and pharmaceutical manufacturing plants, the C300 platform defines the operational backbone of continuous process control for facilities requiring IEC 61511 functional safety compliance and 99.9%+ uptime SLAs. Its modular I/O architecture — built on the Series C Universal I/O (SCUIO) and legacy Series C I/O (SCIO) backplane standards — allows field-replaceable modules without process interruption, a critical requirement in live plant environments.

The 8C-PDOD51 51454361-174 is an 8-channel digital output module rated for 24V DC field devices, designed for direct integration into C300 I/O Link backplanes. It provides discrete control signals to solenoid valves, motor starters, relay coils, and indicator lamps in hazardous and non-hazardous process areas.

The Evolution of C300 Architecture

Honeywell's C300 platform was introduced in the early 2000s as the successor to the TDC 3000 and PlantScape systems, consolidating legacy HPM (High-Performance Process Manager) and ACE (Application Control Environment) nodes into a unified Ethernet-based controller fabric. The architecture has passed through three distinct generations:

Generation 1 (2003–2008): Original C300 controller with SCIO backplane, 40-slot chassis, and proprietary FTE (Fault Tolerant Ethernet) dual-ring redundancy. I/O modules communicated via the C300 I/O Link at 1 Mbit/s. Modules from this era carry part number prefixes in the 51xxx range.

Generation 2 (2009–2016): Introduction of Series C Universal I/O (SCUIO) with software-configurable channel types (AI/AO/DI/DO selectable per channel), reducing spare part SKU proliferation. The CC-PAIX01 and CC-PDOB01 families replaced many fixed-function SCIO modules in new installations.

C300 Series Full Catalog & Functionalities (SKU List)

Digital Output Modules (DO)

8C-PDOD51 (51454361-174): 8-ch 24V DC digital output, SCIO backplane, sourcing type, 0.5A per channel, used for solenoid and relay control in C300 I/O Link segments.

8C-PDOD52 (51454362-175): 8-ch 120V AC digital output module, SCIO backplane, for high-voltage discrete actuator control in legacy plant wiring environments.

CC-PDOB01 (51405038-175): 8-ch 24V DC digital output, SCUIO platform, software-configurable, replaces 8C-PDOD51 in new C300 R400+ installations.

Digital Input Modules (DI)

8C-PDID51 (51454352-175): 8-ch 24V DC digital input, SCIO backplane, dry contact and wet contact selectable, used for limit switch and valve position feedback.

8C-PDID52 (51454353-175): 8-ch 120V AC digital input, SCIO backplane, for legacy AC field device status monitoring.

CC-PDIB01 (51405039-175): 8-ch 24V DC digital input, SCUIO platform, HART-capable, replaces 8C-PDID51 in Experion R400+ systems.

Analog Input Modules (AI)

8C-PAIH01 (51454325-175): 8-ch 4–20 mA analog input with HART 5/6 pass-through, SCIO backplane, 16-bit resolution, for pressure transmitters and flow meters.

8C-PAIH02 (51454326-175): 8-ch thermocouple/RTD analog input, SCIO backplane, supports J/K/T/E/R/S/B TC types and Pt100/Pt1000 RTD, used in temperature-critical process loops.

CC-PAIX01 (51405040-175): 8-ch universal analog input, SCUIO platform, software-selectable mA/mV/TC/RTD per channel, HART 7 pass-through.

CC-PAIH01 (51405041-175): 8-ch 4–20 mA analog input, SCUIO, HART 7, replaces 8C-PAIH01 in R400+ systems.

Analog Output Modules (AO)

8C-PAOH01 (51454335-175): 8-ch 4–20 mA analog output with HART 5/6, SCIO backplane, 12-bit resolution, for control valve positioners and variable speed drives.

CC-PAOX01 (51405042-175): 8-ch universal analog output, SCUIO platform, HART 7, replaces 8C-PAOH01 in R400+ systems.

Controller & CPU Modules

C300 Controller (51309276-175): Primary C300 process controller module, dual FTE ports, 1 GB application memory, supports up to 40 SCIO or 80 SCUIO I/O modules per controller pair.

C300 Redundant Controller Kit (51309277-175): Matched redundant C300 controller pair with synchronization cable, for bumpless failover in SIL-rated control loops.

Power Supply Modules

8C-PCNT01 (51454400-175): C300 I/O Link power conditioner, 24V DC, 5A, provides isolated bus power to SCIO backplane segments.

CC-PWR01 (51405050-175): SCUIO chassis power supply, 24V DC, 10A, dual-redundant input, for Series C Universal I/O cabinets.

Communication & Adapter Modules

8C-TAIX11 (51454450-175): C300 I/O Link termination assembly, 8-ch, screw terminal, for SCIO module field wiring termination.

CC-TAIX11 (51405060-175): SCUIO termination assembly, 8-ch, for CC-series I/O module field wiring.

Sourcing Hard-to-Find & Obsolete C300 Series Parts

For facilities operating C300 systems under Honeywell's Extended Lifecycle Support (ELS) agreement, DriveKNMS provides module-level replacements that are functionally equivalent and backplane-compatible, eliminating the need for full I/O cabinet upgrades. All modules are supplied with full traceability documentation, including original manufacturer labels, date codes, and where available, calibration records. Emergency urgent RFQ handling is available for critical process uptime requirements.