Honeywell 51303976-400 Process Manager (PM) Communication Interface Module

Honeywell 51303976-400 is a dedicated communication board developed for Honeywell TDC3000 / TPS distributed control system, serving as the core data exchange bridge 

for Process Manager (PM) controller units. It realizes high-speed data interaction between PM controller, UCN control network, LCN ring network, I/O processor modules and upper operator stations, 

completes signal encoding, decoding, bus matching and data forwarding work. It supports multi-protocol conversion, stabilizes network transmission quality, avoids communication jitter, 

packet loss and node offline failures caused by bus impedance mismatch and electromagnetic interference. It is a critical maintenance spare part for overhaul, 

troubleshooting and replacement of legacy large-scale petrochemical and power plant Honeywell DCS systems.

Technical Specifications

Part Number: 51303976-400

Manufacturer: Honeywell

Applicable System: TDC3000, TPS, Experion PKS migration DCS system

Position: PM Process Manager dedicated communication card

Supply Voltage: 24VDC

Communication Compatibility: UCN bus, LCN bus, supports Modbus RTU, serial protocol conversion

Onboard Diagnostic: Status LED indicators for running, link and fault alarm

Operating Temperature: -40℃ ~ +85℃

Humidity: 5%–95% non-condensing

Protection Grade: IP20 (cabinet internal installation)

Net Weight: Approx. 0.40–0.65 kg

Origin: USA

Certification: CE, UL

Key Features

Professional bus signal conditioning circuit, effectively suppresses signal reflection, attenuation and cabinet electromagnetic interference to improve overall network stability.

Integrated multi-protocol conversion function, realizes seamless interconnection between internal DCS bus and external third-party industrial communication equipment.

Front panel fault indication LEDs, convenient for on-site rapid judgment of communication link, module operation and abnormal fault state.

Standard rack plug-in structure, plug-and-play replacement, fully compatible with all versions of PM controller chassis to shorten system maintenance downtime.

Conformal coated PCB design, shock, vibration and dust resistant, suitable for long-term continuous operation in harsh industrial control room environments.

Application Scope

Widely used in thermal power plants, oil refineries, chemical plants, metallurgy industries, installed inside Honeywell PM process manager cabinet of TDC3000/TPS DCS system; 

responsible for internal network data transmission of control system, solving communication interruption, controller offline, network fluctuation and other typical DCS communication faults.