Honeywell 51304544-100 KLCN I/O CB Card — TDC 3000 LCN Communication & Interface Board

Brand Honeywell

Model Honeywell 51304544-100 KLCN

Product Overview

The Honeywell 51304544-100 is a KLCN I/O CB Card — an Input/Output Control Board engineered specifically for the Honeywell TDC 3000 Distributed Control System (DCS) and its Local Control Network (LCN) architecture. Within the TDC 3000 hardware hierarchy, the Honeywell 51304544-100 occupies the critical interface position between the control network and the I/O subsystem, managing the orderly flow of process signals between field devices and the control processors that execute regulatory and sequential control strategies. In this role, it functions as both a communication gateway and a signal execution platform, translating the demands of the control system into reliable channel-level I/O operations.

The Honeywell 51304544-100 is configured for input/output communication across the TDC 3000 LCN and provides direct coaxial bus interfacing alongside multi-channel signal handling. It is designed around the proprietary Honeywell LCN communication framework, which is the deterministic backbone connecting operator stations, application processors, history modules, and I/O subsystems throughout a TDC 3000 installation. By sitting on this backbone, the Honeywell 51304544-100 enables the consistent, time-predictable exchange of data that process control demands — whether that data represents a tank level, a reactor temperature, a valve position, or a motor status.

Physically, the board is built to the standard industrial PCB form factor used throughout the TDC 3000 card cage, allowing it to seat directly into the designated chassis slot without mechanical modification. Its industrial-grade construction, combined with channel-to-channel isolation and support for 4–20 mA / HART loop devices, makes the Honeywell 51304544-100 well suited to the electrically noisy, environmentally demanding conditions found in refineries, chemical plants, power stations, and other heavy-process facilities. For asset owners maintaining legacy but still fully operational TDC 3000 systems, the availability of a verified Honeywell 51304544-100 is often the deciding factor between a costly, disruptive full DCS migration and a targeted, economical card replacement that preserves the entire existing I/O and field-wiring investment.

Request Price

Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	Honeywell 51304544-100
Manufacturer	Honeywell
Product Type	KLCN I/O CB Card (Input/Output Control Board)
System Platform	Honeywell TDC 3000 Distributed Control System
Network Architecture	Local Control Network (LCN)
Subsystem Interface	KLCN coaxial bus
Input Signal Types	2-, 3-, or 4-wire analog current/voltage devices
Input Range	0–20 mA or 4–20 mA
Maximum Channels	Up to 32 input channels per module (configuration-dependent)
A/D Converter Resolution	16 bit
Protocol Support	4–20 mA HART loop protocol (digital diagnostics embedded)
Channel-to-Channel Isolation	Yes — maintains signal integrity across input paths
Power Supply	Backplane-supplied regulated DC (24 V DC typical)
Operating Temperature	0 °C to +60 °C (industrial standard; confirm per revision)
Storage Temperature	−40 °C to +85 °C
Humidity Tolerance	5 % to 95 % RH, non-condensing
Dimensions (approx.)	144 mm × 90 mm (standard Eurocard form factor)
Weight (approx.)	0.31 lb / 140 g
Mounting Format	TDC 3000 card cage / module rack, edge-connector backplane
Hot-Swap Capable	Not recommended under power (de-energize before insertion/removal)

Note: Values such as operating temperature, exact channel count, and backplane current load can vary by revision (Rev B, Rev G, etc.). Always confirm against the unit label and the system-specific TDC 3000 hardware manual before commissioning.

Main Features and Advantages

Native TDC 3000 / LCN integration. The defining advantage of the Honeywell 51304544-100 is that it is purpose-built for the TDC 3000 Local Control Network rather than adapted from a generic interface. Every connector, timing characteristic, and software interaction aligns with the original Honeywell architecture, which eliminates the compatibility uncertainty that typically surrounds third-party or refurbished substitutes. The card simply assumes its assigned node role and resumes deterministic communication across the LCN.

Deterministic, error-resilient communication. The LCN framework depends on predictable, low-jitter data exchange, and the Honeywell 51304544-100 is designed to preserve exactly that behavior. Integrated error detection and correction logic helps ensure stable telegram transmission even in electrically harsh plant environments. The result is consistent scan timing, fewer unexplained communication alarms, and greater confidence that control decisions are being made on current, accurate data.

Channel-to-channel isolation for signal integrity. A key performance feature of the Honeywell 51304544-100 is galvanic separation between input channels. This isolation prevents ground loops and limits the propagation of noise from one field loop to another, so a problem on one instrument does not contaminate readings elsewhere. In multi-channel analog applications — common in temperature, pressure, and composition monitoring — this directly improves measurement fidelity and reduces the need for downstream filtering or recalibration.

HART support for diagnostic visibility. By supporting 4–20 mA HART loop devices, the Honeywell 51304544-100 allows analog measurement signals to coexist with embedded digital diagnostics. Maintenance teams can read device status, calibration data, and health indicators without disturbing the primary control signal, turning a basic I/O card into a window into instrument condition across the plant.

Drop-in form factor and lifecycle continuity. The board conforms to the standard TDC 3000 Eurocard geometry and backplane interface, so it installs directly into the existing card cage with no mechanical alteration, no rewiring of field termination assemblies, and no software migration. For facilities running a disciplined legacy-asset strategy, this makes the Honeywell 51304544-100 a low-risk way to extend the service life of a proven control system while deferring a full DCS replacement.