Honeywell 51304386-100
Honeywell 51304386-100
Honeywell 51304386-100
Honeywell 51304386-100
Honeywell 51304386-100

Honeywell 51304386-100 | Industrial Automation Serial Interface Module

  • Brand: Honeywell
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    Model: 51304386-100
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    Product Type: Serial Communication Module
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    Series: Experion PKS (Distributed Control System I/O)
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    Core Function: Provides 2 isolated serial ports (RS-232/RS-485) to connect Experion PKS controllers with remote devices (e.g., smart sensors, PLCs, printers) for bidirectional data exchange in distributed industrial networks.
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    Key Specs: 2 channels, supports Modbus RTU/ASCII, 9600-115200 bps baud rate, 1500VAC isolation, -40°C to +70°C operating temperature, SIL 2 certified.
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Part number: Honeywell 51304386-100
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Description

51304386-100: Product Overview
The 51304386-100 is a 2-channel serial communication module designed for integration into Honeywell’s Experion PKS distributed control system (DCS). It serves as a dedicated interface for extending serial communication capabilities of PKS controllers, enabling connection to legacy or third-party devices that rely on RS-232 or RS-485 protocols. Its primary role is to facilitate reliable data exchange—including process variables, device status, and diagnostic information—between the DCS and remote endpoints in applications where serial communication remains prevalent, such as oil refineries, chemical plants, and utility systems.
Functionally, the module supports independent configuration of each channel for RS-232 (point-to-point) or RS-485 (multi-drop) operation, with protocol support for Modbus RTU and ASCII. It processes serial telegrams, handles error checking (CRC), and isolates each port to prevent ground loops and electromagnetic interference (EMI). As part of the Experion PKS I/O family, the 51304386-100 integrates with the platform’s high-speed I/O link, hot-swappable architecture, and unified engineering tools (ControlEdge Builder), simplifying deployment and maintenance. This design aligns with compliance to IEC 61508 (SIL 2) and industrial standards, making it suitable for continuous process environments requiring robust serial connectivity.

Honeywell 51304386-100

Honeywell 51304386-100

51304386-100: Technical Specifications
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    Model Number: 51304386-100
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    Manufacturer: Honeywell
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    Product Type: Serial Communication Module
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    Communication Protocol: Modbus RTU, Modbus ASCII
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    Interface Type: RS-232 (DB9 female), RS-485 (2-wire/4-wire, terminal block)
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    Number of Channels: 2 (independently configurable)
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    Baud Rate: 9600, 19200, 38400, 57600, 115200 bps (software-selectable)
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    Isolation Voltage: 1500VAC (port-to-bus, port-to-ground)
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    Operating Temperature: -40°C to +70°C
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    Power Supply: 24V DC (nominal, 18-30V DC range) from PKS chassis
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    Power Consumption: 1.8W (typical, both ports active)
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    Humidity Range: 5% to 95% non-condensing
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    Certifications: SIL 2 (IEC 61508), CE, UL, ATEX Zone 2 (optional)
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    Dimensions: 25mm x 128mm x 115mm (width x height x depth, fits PKS I/O slot)
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    Weight: 0.18kg
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    Diagnostics: Port status (tx/rx), parity error, framing error, device timeout
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    Hot Swap Support: Yes (plug-and-play replacement without system shutdown)

    Honeywell 51304386-100

    Honeywell 51304386-100

Core Features & Customer Value​
Flexible Port Configuration for Mixed Environments: The 51304386-100 allows each of its 2 channels to be independently set as RS-232 (for point-to-point devices like barcode scanners) or RS-485 (for multi-drop networks with up to 32 nodes). For engineers, this eliminates the need for separate modules in systems with diverse serial devices—e.g., a water treatment plant connecting both a RS-232 printer and RS-485 pH sensors to a single PKS controller, reducing cabinet space by 30%.
Galvanic Isolation Protects Against Electrical Noise: With 1500VAC isolation between ports and the PKS bus, the module prevents EMI from industrial equipment (e.g., variable frequency drives, motors) from corrupting serial data. In a chemical plant’s remote pump station, this ensures reliable transmission of Modbus RTU commands to pump controllers, avoiding false trips caused by nearby agitator noise.
Hot-Swappable Design Minimizes Downtime: The module can be replaced while the system remains powered, critical for continuous processes like oil refining. Technicians simply remove the faulty unit and insert a new one; the PKS controller automatically re-establishes serial communication via I/O link. This avoids scheduled shutdowns for maintenance, saving thousands in lost production per incident.
Comprehensive Diagnostics Streamline Troubleshooting: Built-in diagnostics monitor port activity (transmission/reception), parity/framing errors, and device timeouts. Faults are reported to the PKS controller via I/O link, with LED indicators on the faceplate for quick visual identification. For maintenance teams, this reduces troubleshooting time from hours to minutes—e.g., identifying a disconnected RS-485 sensor in a remote wellhead without dispatching a crew.
SIL 2 Certification for Safety-Critical Applications: When integrated into a Honeywell Safety Manager SIS, the 51304386-100 meets SIL 2 requirements (IEC 61508), enabling its use in safety functions like remote emergency stop monitoring. Its fault-tolerant design (hardware fault tolerance ≥1) ensures communication reliability in safety interlocks, aligning with audit requirements for regulated industries.
Typical Applications​
The 51304386-100 is deployed in systems requiring serial communication with Experion PKS controllers. In a petroleum refinery’s remote tank farm, it connects a PKS controller to 8 Modbus RTU level transmitters (RS-485) and a RS-232 printer for batch tickets. The module’s 115200 bps baud rate ensures real-time inventory updates, while SIL 2 certification supports overfill protection interlocks.
At a chemical plant’s batch reactor, the 51304386-100 interfaces with a RS-232 barcode scanner (for raw material tracking) and 4 RS-485 temperature transmitters. Its -40°C cold-start capability supports outdoor installations, and hot-swap capability allows maintenance during rain events without service disruption.
In a municipal wastewater treatment plant, the module links the PKS controller to 16 RS-485 dissolved oxygen sensors across oxidation ditches. Diagnostics alert staff to a sensor communication timeout before effluent violates EPA limits, ensuring compliance.

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