The Honeywell 51305072-100, also cataloged as the 51305072-100 Local Control Network I/O Card, operates as a dedicated hardware component for network node addressing and communication interface routing within TDC 3000 Local Control Network (LCN) architectures. The chassis-mounted sub-assembly provides direct physical and electrical execution to link internal processing logic blocks straight to redundant CLCN-A/B network communication trunks.
Hardware Specifications
Parameter
Specification
Model
51305072-100
Brand
Honeywell
Series
TDC 3000 / Local Control Network (LCN)
Origin
United States
Weight
0.43 lbs (0.20 kg) net physical component mass
Network Compatibility
CLCN-A / CLCN-B token-passing infrastructures
Addressing Method
Integrated onboard mechanical slide switch matrix
Connection Interfaces
Dual redundant LCN A and LCN B coaxial drop tracks
Compliance
Certified CE Mark European conformity standards
Power Consumption
Regulated logic supply via shared chassis backplane tracks
Product Type
Distributed I/O Boards
Process Control & DCS Instrumentation Interface
Channel-to-Channel Isolation and Redundant Trunk Gating The I/O card incorporates dedicated electrical separation boundaries to enforce channel-to-channel isolation between the parallel LCN A and LCN B coaxial lines. This hardware-tier decoupling ensures that an electrical short, ground fault, or high-voltage inductive transient on one physical network cable cannot disrupt data transmission registers or bleed noise into the active redundant communication path.
4-20 mA HART Loop Protocol System Segmentation The assembly manages upper-tier network data translation matrices completely isolated from field-side 4-20 mA HART loop protocol signaling drops. This structural zoning ensures that local node addressing operations and high-frequency token-passing routines do not inject carrier noise back into active analog control lines or interrupt the core DCS processing cycle.
