Honeywell 51303944-100 LCN Paddlecard Assembly Network Interface Board

Honeywell 51303944-100 is a dedicated LCN (Local Control Network) paddlecard interface assembly exclusively designed for Honeywell TDC3000 / TPS distributed control system. 

It serves as the physical connection adapter between LCN communication mainboard and backplane bus, realizing data transmission interaction among Universal Station (US), 

HM operator stations, control processors and various I/O nodes on LCN ring network. It stabilizes bus signal transmission, matches impedance for long-distance communication, 

eliminates signal reflection interference, guarantees high-speed, error-free cyclic communication of the whole DCS system. It is an essential network spare part for overhaul, 

replacement and troubleshooting of petrochemical, power plant legacy Honeywell DCS systems.

Technical Specifications

Part Number: 51303944-100

Manufacturer: Honeywell

Type: LCN Paddlecard Assembly / Backplane Interface Card

Applicable System: TDC3000, TPS, Experion PKS migration system

Bus Type: LCN Local Control Ring Network

Function: LCN signal matching, impedance conversion, bus physical interface conversion

Mounting: Plug-in installation matched with LCN main control card

Operating Temperature: -20°C ~ +60°C

Humidity: 5%–95% non-condensing

Protection Grade: IP20

Net Weight: Approx. 0.38 kg

Origin: USA

Certification: CE, UL

Key Features

Professional LCN bus impedance matching design, effectively restrain signal oscillation and reflection, improve ring network communication stability.

Compact paddlecard plug-in structure, precise docking with original LCN mainboard, no modification required for on-site replacement.

Anti-interference PCB layout adapts complex electromagnetic environment inside industrial control cabinet, reducing communication packet loss and network breakdown faults.

Direct plug-and-play replacement for failed original paddlecard, greatly shorten system maintenance downtime.

Full compatibility with early and late versions of TDC3000/TPS LCN nodes, widely stocked maintenance spare part for legacy Honeywell DCS units.