Honeywell 51305430-100 LCNP4 Local Control Network Processor Board for TPS Systems

Brand Honeywell

Model Honeywell 51305430-100 LCNP4

Description

The Honeywell 51305430-100 is an LCNP4 Local Control Network Processor Board manufactured by Honeywell for the TotalPlant Solution (TPS) and TDC 3000 distributed control system platforms. As a dedicated network co-processor card, it provides the hardware interface between host workstations and the Local Control Network (LCN) coax infrastructure, enabling real-time data exchange across the control system .

This board installs in host workstation slots and handles LCN protocol processing independently, offloading network communication tasks from the host CPU. The 51305430-100 is based on the Motorola MC68040 processor running at 33 MHz with 32 MB of onboard DRAM, delivering the performance required for TPS Network software personalities and global database synchronization .

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Description

Application Scenarios

In a refinery running a legacy Honeywell TPS control system, operators depend on Global User Station (GUS) workstations to monitor and control processes across multiple units. The critical link between those workstations and the LCN coax network is the LCNP4 processor board. When an 51305430-100 fails, the associated workstation loses view of the entire LCN network—operators go blind to process conditions, alarms stop updating, and control room response times deteriorate dramatically.

The Honeywell 51305430-100 addresses this vulnerability by providing a robust, independently processing interface to the LCN. It decodes network communication frames, routes real-time global database updates between the physical coax cable and local application processors, and maintains continuous connectivity even when the host workstation is under heavy load . For facilities running TPS or TDC 3000 systems that must remain operational for years despite discontinued manufacturer support, this board represents the lifeline that keeps control room visibility intact.

Parameters

Main Parameters	Value/Description
Product Model	51305430-100
Manufacturer	Honeywell
Product Category	LCNP4 Local Control Network Processor Board
Processor	33 MHz Motorola MC68040
Memory	32 MB DRAM (16 megawords)
Network Interface	TPS Network Interface / LCN Coax (A/B redundant)
Host Interface	Proprietary workstation slot bus
Function	LCN protocol co-processing, global database routing
Power Consumption	Backplane-supplied, low-power design
Operating Temperature	0°C to +50°C (control room environment)
Form Factor	Multi-layer PC board, workstation slot card
Compatibility	TPS, TDC 3000X, GUS Workstations
Lifecycle Status	Discontinued by manufacturer (surplus/refurbished only)

MC68040 Processor (33 MHz): High-performance 32-bit CPU for real-time LCN protocol handling without host CPU burden.
32 MB DRAM: Doubles the memory of previous LCNP generations, supporting larger tag databases and smoother TPS Network operation.
A/B Coax Redundancy: Dual LCN channel support enables seamless failover if one coax path degrades or breaks.
Compatibility: Works with GUS workstations and APP nodes in TPS and TDC 3000 architectures.