Model Explanation

51400955-100: Honeywell part number (no delimiter 51400955100)

51400955 = PNI Process Network Interface Board Series

100 = Standard version, Rev B firmware, industrial-grade temperature

Component Type: PNI PWA (Process Network Interface Printed Wiring Assembly)

Compatible Devices: TDC 3000 LCN Rack, Application Processor (AP), UCN Network Controller, TPS System Node Technical Specifications

Network Protocol: LCN (10 Mbps), UCN (5 Mbps), Dedicated Process Network Protocol

Processor: Dedicated 32-bit communication processor, with a main frequency of 25 MHz

Memory: 1 MB RAM (data cache), 512 KB EPROM (firmware)

Data Transfer Rate: Maximum 1000 frames per second, supports 512 network nodes

Power Supply: 5 VDC (backplane, ±5%), power consumption ≤ 18 W

Operating Temperature: 0°C ~ +60°C (environment of the cabinet)

Storage Temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% RH (no condensation)

Size: Standard 19-inch card (3U)

Weight: Approximately 1.4 kg

Certifications: CE, UL, CSA

Interfaces and Configuration

Backplane Interface: LCN cabinet gold fingers, dedicated network bus

Network Interface: LCN coaxial interface, UCN twisted pair interface (optional)

Status Indicators: PWR, RUN, LCN ACT, UCN ACT, FAULT LED

Redundancy: Supports 1:1 redundancy configuration (dual PNI hot backup switching)

Compatibility: Compatible with all versions of TDC 3000 LCN network, compatible with UCN, HLAI, LLMUX, etc. subsystems Core function

Multi-network protocol conversion: Achieve mutual conversion between LCN and UCN protocols, supporting transparent transmission of process data, alarms, trends and control instructions across networks.

High-speed data gateway: As the interface between LCN and external systems (such as third-party DCS, SCADA), the data forwarding delay is ≤ 1 ms, ensuring real-time performance.

Network node management: Monitor the status of LCN/UCN nodes, automatically route data frames, support network fault self-healing and hot plugging of nodes.

Data caching and forwarding: 1 MB high-speed cache, buffer burst data, avoid network congestion, improve transmission stability.

Fault diagnosis and alarm: Real-time monitoring of communication links, protocol errors and hardware status. When a fault occurs, the FAULT light is illuminated and a system alarm is generated. Online diagnosis is supported. Applicable scenarios

System: Honeywell TDC 3000, TPS, Experion PKS (LCN compatible)

Equipment: LCN cabinet, application processor (AP), UCN network controller, TDC 3000 process control system

Industry: Petrochemicals, thermal power, nuclear power, metallurgy, cement, pharmaceuticals, papermaking

Application: LCN and UCN network interconnection, data connection with third-party systems, network communication redundancy upgrade, replacement and maintenance of old system network cards