Honeywell 8C-TAOXB1 51307137-175
Honeywell 8C-TAOXB1 51307137-175

Honeywell 8C-TAOXB1 51307137-175 | C300 Series 4-20mA/0-10V Analog Output Module

  • Brand: Honeywell
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    Model: 8C-TAOXB1 51307137-175
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    Product Type: Analog Output Module
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    Series: Experion PKS C300 (Distributed Control System I/O)
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    Core Function: Provides 8 independent analog output channels (4-20mA/0-10V) to drive actuators, valves, and other final control elements in process control systems; interfaces with Experion PKS C300 controllers for real-time signal transmission.
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    Key Specs: 8 output channels, ±0.1% full-scale accuracy, 24V DC power, -40°C to +70°C operating temperature, supports 4-20mA/0-10V/0-5V outputs, plug-and-play with C300 chassis.
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Part number: Honeywell 8C-TAOXB1 51307137-175
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Description

8C-TAOXB1 51307137-175: Product Overview
The 8C-TAOXB1 51307137-175 is an 8-channel analog output module designed for integration into Honeywell’s Experion PKS C300 distributed control system (DCS). It serves as a critical interface between the C300 controller and field actuators (e.g., control valves, variable frequency drives, damper motors), converting digital control signals from the controller into precise analog outputs (4-20mA, 0-10V, or 0-5V) to regulate industrial processes. Its role is to ensure accurate, responsive control in applications where maintaining setpoints (e.g., temperature, pressure, flow) is essential for safety and efficiency.
Functionally, the module processes 16-bit digital values from the C300 controller, applies linearization and scaling, and outputs calibrated analog signals to field devices. It supports individual channel configuration (output type, range, fault behavior) via Experion PKS engineering tools, allowing adaptation to diverse actuator requirements. As part of the C300 I/O family, it benefits from the platform’s high-speed communication (via I/O link), hot-swappable design, and seamless integration with control strategies (e.g., PID loops, cascade control). This architecture is ideal for continuous processes in oil refining, chemical manufacturing, and power generation, where signal integrity and uptime directly impact product quality and regulatory compliance.
8C-TAOXB1 51307137-175: Technical Specifications
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    Model Number: 8C-TAOXB1 51307137-175
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    Manufacturer: Honeywell
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    Product Type: Analog Output Module
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    Number of Channels: 8 (independently configurable)
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    Output Types: 4-20mA (sink/source), 0-10V DC, 0-5V DC
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    Accuracy: ±0.1% of full scale (FS) at 25°C; ±0.2% FS over operating range
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    Resolution: 16-bit (65536 steps)
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    Load Impedance: 4-20mA: 0-750Ω; 0-10V: ≥1kΩ
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    Power Supply: 24V DC (nominal, 18-30V DC range) from C300 chassis
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    Power Consumption: 3W (typical, all channels active)
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    Operating Temperature: -40°C to +70°C
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    Humidity Range: 5% to 95% non-condensing
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    Communication: I/O link (proprietary, high-speed serial to C300 controller)
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    Diagnostics: Channel fault (open circuit, short circuit), power status, communication heartbeat
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    Dimensions: 25mm x 128mm x 115mm (width x height x depth, fits C300 I/O slot)
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    Weight: 0.2kg
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    Certifications: CE, UL, ATEX Zone 2 (optional), SIL 2 (when integrated into SIS)

    Honeywell 8C-TAOXB1 51307137-175

    Honeywell 8C-TAOXB1 51307137-175

Core Features & Customer Value​
High-Precision Output for Process Stability: The module’s 16-bit resolution and ±0.1% FS accuracy ensure minimal signal error, critical for controlling sensitive processes like reactor temperature in chemical plants. For example, in a polymerization reactor, precise 4-20mA output to cooling water valves maintains temperature within ±0.5°C, preventing product degradation. The ability to configure individual channels (e.g., 4-20mA for one valve, 0-10V for another) avoids the need for signal converters, simplifying system design.
Hot-Swappable Design Minimizes Downtime: As a plug-and-play C300 I/O module, the 8C-TAOXB1 51307137-175 can be replaced without shutting down the controller or field devices. For maintenance teams in refineries, this reduces unplanned downtime during module failure—cutting repair time from hours to minutes. The module’s self-identification feature (via I/O link) automatically loads configuration data from the controller, eliminating manual setup.
Robust Diagnostics Enhance Maintainability: Built-in diagnostics monitor channel health (e.g., open-circuit detection for 4-20mA outputs, overvoltage for 0-10V outputs) and report faults to the C300 controller. Engineers receive real-time alerts (e.g., “Channel 3: Output short circuit”), pinpointing issues without field inspection. For a power plant’s boiler feedwater control, this prevents incorrect valve positioning due to a faulty output, avoiding unsafe pressure spikes.
Wide Environmental Tolerance for Harsh Installations: Operating from -40°C to +70°C and with optional ATEX Zone 2 certification, the module withstands outdoor or unconditioned environments (e.g., offshore platform control cabinets, desert pipeline stations). Its conformal-coated PCB resists humidity and dust, ensuring 10+ year reliability in remote locations where maintenance visits are infrequent.
Typical Applications​
The 8C-TAOXB1 51307137-175 is deployed in continuous process control systems requiring precise analog actuation. In a petroleum refinery’s fluid catalytic cracking (FCC) unit, it drives 8 control valves regulating catalyst flow, feedstock input, and regenerator air. The module’s 4-20mA outputs adjust valve positions based on C300-calculated setpoints, maintaining optimal conversion rates while meeting EPA emission limits.
At a chemical plant’s distillation column, the module controls 8 temperature-regulating valves (0-10V outputs) for heating steam. Its high accuracy (±0.1% FS) ensures column temperature stays within 1°C of the setpoint, maximizing product purity. Hot-swap capability allows technicians to replace a faulty channel during a scheduled turnaround without halting production.
In a municipal water treatment plant, the module operates 8 variable frequency drives (VFDs) for pump speed control (4-20mA outputs). It adjusts pump rates based on reservoir level sensors, with diagnostics alerting staff to a VFD communication fault—preventing pump overload during peak demand.

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