The Honeywell 51107403-100 is a legacy Local Control Network (LCN) Input/Output board engineered for the Honeywell TDC 3000 distributed control system (DCS) platform. It functions as the physical and logical communication interface between dedicated LCN nodes and the redundant coaxial network infrastructure, providing dual-port hardware routing inside industrial processing environments.
Hardware Specifications
Parameter
Specification
Part Number
51107403-100 (Alternative: 51107403100)
Brand
Honeywell
System Platform
TDC 3000 DCS / LCN Node Architecture
Product Type
Local Control Network Interface I/O Board
Chassis Compatibility
5-Slot or 10-Slot Non-CE Compliant Chassis Profiles
Weight
0.35 lbs (approx. 0.16 kg)
Network Ports
Dual redundant BNC connections (LCN Port A & Port B)
Physical Addressing
On-board hardware jumpers/switches for LCN device node configuration
Network Medium
Coaxial cable segments and Fiber Optic Transceiver links
Legacy Replacement
Superceded in later legacy updates by the 51305072-400 I/O assembly
Redundant LCN Node Routing & Physical Addressing
The 51107403-100 board establishes concurrent, redundant transmission lines across the legacy local control network via dedicated LCN A and LCN B channels. To maintain system uptime, these dual coaxial segments are physically isolated and routed along separate paths throughout the facility.Connection to the active token-passing network is executed through standardized BNC tee connectors (part number 51190728-105). These tees allow a technician to pull the board or drop a single node entirely offline without breaking the physical continuity of the coaxial segment or interfering with surrounding node traffic. Additionally, this module hosts the physical hardware switches where the unique LCN device network address must be assigned prior to system node initialization.
