Honeywell 51306673-200 Digital Input IOP for UCN Process Control Systems

Brand Honeywell

Model Honeywell 51306673-200

Product Overview

The Honeywell 51306673-200 is a Digital Input Input/Output Processor (IOP)—also referred to as a Digital Input Pointcard—engineered for the Universal Control Network (UCN) layer of Honeywell’s TDC 3000 and Experion PKS distributed control ecosystems. Within the UCN architecture, the IOP sits at the heart of the I/O subsystem, residing in the I/O chassis of a High-Performance Process Manager (HPM), Advanced Process Manager (APM), or Logic Manager (LM) and interfacing directly with a dedicated Field Terminal Assembly (FTA). Its fundamental purpose is to acquire, condition, and isolate discrete on/off signals from field-mounted switches, relays, and contact devices, then deliver deterministic status data upward to the controller and ultimately to the operator and engineer stations on the LCN.

The Honeywell 51306673-200 is purpose-built for high-density contact monitoring, with channel counts of 16 or 32 points depending on firmware revision and the paired FTA. Every input is opto-electrically isolated between the field side and the system backplane, protecting sensitive control electronics from ground loops, voltage transients, and the electrical noise endemic to heavy-industrial installations. Integrated signal filtering and level translation convert raw, ragged field contacts into clean, stable logic that the controller can act on without debounce or misinterpretation.

For plant engineers maintaining legacy Honeywell infrastructure, the Honeywell 51306673-200 offers a genuine, like-for-like replacement that restores full discrete-input capability without rewiring the FTA, reconfiguring the control strategy, or disturbing the existing UCN node addressing. Whether used for emergency fault repair—such as a channel error, input-signal failure, or module fault—or as part of a preventive spare-stocking program, this module delivers the reliability, traceability, and deterministic behavior expected of a critical process-control component.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	51306673-200
Manufacturer	Honeywell Process Solutions
Product Type	Digital Input IOP / Pointcard (DI IOP)
Compatible Platform	TDC 3000 / Experion PKS (UCN Node)
Network Interface	UCN (Universal Control Network)
Host Chassis	HPM / APM / LM I/O chassis
Input Type	Dry contact / 24 VDC discrete
Number of Inputs	16 or 32 channels (revision / FTA dependent)
Isolation	Optical (field-to-system)
Input Response Time	≤ 5 ms
Operating Voltage	24 VDC (backplane / field side)
Diagnostics	Open-circuit / short-circuit / channel-fault detection
Indicators	Per-channel LEDs + RUN / FAULT
Certifications	CE marked (CC variants available)

Main Features and Advantages

High-density discrete acquisition: The Honeywell 51306673-200 consolidates a large number of dry-contact and 24 VDC discrete inputs into a single UCN IOP slot, making it ideal for applications that must monitor dozens or hundreds of binary field devices—pump run status, valve limit switches, motor-feedback contacts, and alarm dry contacts—without proliferating card files.

Galvanic isolation and signal conditioning: Each input path uses opto-coupler isolation to electrically separate the field-wiring side from the control-system backplane. This prevents high-voltage transients, ground loops, and electromagnetic interference from reaching the controller, while built-in filtering and level translation convert noisy raw contacts into stable, logic-level signals the processor can trust.

Self-diagnostics and fault visibility: The Honeywell 51306673-200 performs hardware-level self-diagnostics, detecting conditions such as open circuits, short circuits, and channel-level anomalies, then reporting diagnostic status to the controller. Combined with per-channel LEDs and dedicated RUN / FAULT indicators, this gives maintenance teams immediate visual confirmation of module health and accelerates troubleshooting during an outage.

Seamless UCN integration: Designed as a native UCN node resident, the IOP communicates over the 5 Mbps redundant UCN backbone and inherits the network’s deterministic, peer-to-peer data-exchange behavior. It pairs with a matching FTA for clean field termination and supports redundant cabling, preserving the high-availability design principles of the TDC 3000 platform.

Drop-in replacement and fast commissioning: Because the Honeywell 51306673-200 is electrically and mechanically compatible with the existing I/O chassis and FTA, installation is a straightforward card swap—no cabinet modification, no I/O rewiring, and no control-logic re-engineering required. This minimizes mean time to repair (MTTR) and gets the process back online quickly.

Rugged industrial construction: Housed in a durable aluminum enclosure and specified for operation across a wide temperature range, the module withstands the humidity, vibration, and thermal cycling typical of control-room and cabinet-mounted installations. CE-marked (and CC-compliant) variants provide assurance of global safety and quality conformance.