The Honeywell LCNP4E2 Interface Card (Part Number 51454493-126, Rev HW-D / FW-C) is a next-generation Local Control Network (LCN) communication module designed for high-reliability data exchange within Honeywell Distributed Control Systems. As an enhanced version of the LCNP4E series, the LCNP4E2 provides improved processing performance, stable network communication, and long-term operational durability in demanding industrial environments.

With Hardware Revision D and Firmware Revision C, this module ensures compatibility with specific system configurations, delivering efficient and deterministic communication between controllers, servers, operator stations, and other LCN devices. It is widely used as a maintenance replacement part or system expansion module in Honeywell DCS installations.

Key Features

• Model: LCNP4E2

• Part Number: 51454493-126

• Revision: Hardware D | Firmware C

• Advanced LCN interface card for Honeywell DCS

• High-speed, reliable network communication

• Enhanced processing over earlier LCNP modules

• Designed for continuous 24/7 industrial operation

• Rugged, field-proven hardware

• Ideal for system upgrades, replacements, or expansion requirements

Applications

• Honeywell TDC3000 / LCN Distributed Control Systems

• Power generation and utility plants

• Refining, petrochemical, and oil & gas operations

• Heavy process industries and manufacturing facilities

• Maintenance, retrofit, and control network expansion projects

• Replacement for aging or failed LCNP modules

Why This Module Is Important

The LCNP4E2 ensures stable communication throughout Honeywell DCS architectures, helping maintain system integrity, responsiveness, and uptime. Matching HW-D / FW-C revisions guarantees proper compatibility and performance—making this card a valuable spare or upgrade component for critical control networks.