Honeywell 51305072-200 CLCN-A Control Network Module

The Honeywell 51305072-200 CLCN-A is a critical control network interface module designed for use in Honeywell distributed control systems (DCS), including TDC 3000 and Experion platforms. It facilitates high-speed, deterministic communication between controllers, I/O subsystems, and other network nodes, ensuring seamless data exchange and system integrity. Engineered for industrial environments, this module provides robust performance and supports redundant configurations for maximum availability.

Overview and Key Features

The CLCN-A module acts as a communication gateway on the control network, enabling reliable data transfer and coordination among distributed system components. Key features include:

• High-speed communication interface supporting Honeywell proprietary protocols (e.g., LCN, UCN)

• Redundant communication paths for fault-tolerant operation and bumpless failover

• Diagnostic LEDs for power, network activity, and module health status

• Comprehensive self-test and diagnostics for early fault detection

• Hot-swappable design (in supported racks) minimizing downtime during replacement

• Industrial-grade construction for extended temperature range and vibration resistance

• Compatible with Honeywell Series 8 I/O racks and legacy TDC 3000 cabinets

Technical Specifications

Redundancy and High Availability

In critical process control applications, the 51305072-200 CLCN-A supports redundant operation. When installed as a pair, both modules run simultaneously, with one active and one standby. Continuous health monitoring and data synchronization ensure that if the active module fails, the standby takes over instantly without disrupting network communication. This architecture is essential for processes where downtime is unacceptable, such as refining, power generation, and chemical production.

Integration with Honeywell Systems

The CLCN-A module is designed to plug directly into Honeywell I/O racks (e.g., Series 8 or legacy TDC 3000 racks). It communicates with controllers such as the C300, C200, or PM (Process Manager) via the backplane, and connects to the control network through front-panel ports. Configuration is performed using Honeywell engineering tools (e.g., Control Builder, TDC 3000 LCN), where network parameters, node addresses, and redundancy settings are defined. The module is fully compatible with Experion and TDC 3000 architectures.

Applications

This network interface module is deployed in various industries for reliable control system communication:

• Oil and gas – upstream, midstream, and downstream facilities

• Chemical and petrochemical processing

• Power generation (fossil, nuclear, renewable)

• Pharmaceutical manufacturing

• Pulp and paper mills

• Water and wastewater treatment

It serves as the backbone for data exchange between controllers, operator stations, engineering workstations, and historians.

Installation and Maintenance

Installation is simple: the module slides into a designated slot in the rack and is secured with integral locking mechanisms. Front-panel LEDs provide immediate status indication: power, active/standby status, network link, and fault. In redundant configurations, modules can be replaced online—simply remove the failed unit and insert a new one while the system continues operating. Regular maintenance is limited to visual inspection and firmware updates when required.

Certifications and Compliance

The Honeywell 51305072-200 CLCN-A meets industry standards for safety and performance:

• CE – EMC and Low Voltage Directives

• UL/cULus – UL 61010-1, UL 61010-2-201

• FM – Class I Division 2 (optional)

• RoHS compliant

These certifications ensure suitability for global deployment in hazardous and non-hazardous locations.