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- Foxboro
- FBM202 P0916AC
- Thermocouple/mV Input Termination Assembly
- USA
- 125 × 76 × 80 mm
- 0.159 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Foxboro FBM202 P0916AC is an I/A Series 200 Thermocouple/mV Input Termination Assembly used as the field wiring interface for thermocouple and millivolt input circuits. It connects the field-side measurement wiring with the associated FBM202 input module, keeping the physical termination separate from the electronic signal-processing hardware.
In a typical installation, thermocouples are installed at process equipment such as reactors, heaters, furnaces, vessels, or process piping. Their low-level signals travel through suitable thermocouple or compensating wiring to the termination assembly, where the field connections are organized before reaching the FBM202.
Because thermocouple signals are low-level measurements, the termination point deserves particular attention during commissioning and troubleshooting. Loose terminals, incorrect polarity, unsuitable wiring, or poor connections can affect the temperature value seen by the control system even when the FBM202 input module itself is operating normally.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FBM202 P0916AC |
| Series | I/A Series 200 |
| Product Type | Thermocouple/mV Input Termination Assembly |
| Dimensions | 125 × 76 × 80 mm |
| Weight | 0.159 kg |
| Application | Thermocouple and millivolt input termination |
| System Application | Foxboro I/A Series 200 process measurement |
Product Features
- Thermocouple/mV field termination for Foxboro I/A Series 200 systems.
- Provides the physical connection point for low-level temperature measurement wiring.
- Used with the associated FBM202 Thermocouple/mV Input Module.
- Separates field wiring termination from electronic I/O processing.
- Supports organized cabinet wiring and easier channel identification.
- Suitable for installation, commissioning, loop checking, and maintenance.
Working Principle
The FBM202 P0916AC provides the physical termination path for thermocouple and millivolt signals entering the I/A Series control system. Field conductors are landed at the termination assembly and routed through the corresponding internal connection toward the FBM202 input module.
The assembly does not perform the main measurement processing itself. Its purpose is to maintain the correct electrical connection between the field measurement circuit and the input electronics. The associated FBM202 then acquires and processes the low-level signal for use by the control system.
For troubleshooting, this distinction is useful. If a thermocouple reading is incorrect, the technician can check the sensor, thermocouple wiring, P0916AC termination points, connection to the FBM202, and the module itself in sequence. This helps identify whether the problem is in the field circuit or the electronic I/O hardware.
Role in the I/A Series 200 Control Architecture
| System Element | Function |
|---|---|
| Thermocouple / mV Source | Generates the low-level temperature or millivolt measurement signal. |
| Thermocouple Wiring | Carries the measurement signal from the process to the control cabinet. |
| FBM202 P0916AC | Provides the termination interface for thermocouple and mV input wiring. |
| FBM202 Input Module | Acquires and processes the connected low-level input signals. |
| I/A Series Control Network | Transfers measurement data through the control-system architecture. |
| Control Processor | Uses the acquired measurements for control logic, monitoring, and alarms. |
| Operator Interface | Displays process values, trends, alarms, and diagnostic information. |
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Temperature Measurement | Termination of thermocouple wiring connected to process temperature sensors. |
| Chemical Processing | Field connection for temperature measurements from reactors, vessels, and heaters. |
| Oil and Gas | Termination of temperature signals from production and processing equipment. |
| Refining and Petrochemical | Connection of thermocouple circuits used around furnaces, heaters, and process units. |
| Power Generation | Field termination for temperature measurement in boilers, turbines, and auxiliary systems. |
| Industrial Heating | Connection point for thermocouple-based temperature monitoring circuits. |
Installation and Maintenance
- Verify the exact assembly identification before installation. Confirm FBM202 P0916AC and the applicable I/A Series 200 system configuration.
- Isolate the relevant circuits before removing or connecting field wiring and follow the site’s electrical safety procedures.
- Document the existing terminal arrangement before disconnecting conductors so each thermocouple remains associated with the correct input channel.
- Verify thermocouple polarity during installation. Incorrect polarity can result in an incorrect temperature reading.
- Confirm the appropriate thermocouple or compensating cable is used throughout the field signal path.
- Inspect terminals and conductors for loose connections, corrosion, damaged insulation, or signs of overheating.
- Check the connection to the FBM202 module if a valid field signal is present but the control system reports an abnormal value.
- Inspect for electrical interference when low-level signals show unexpected fluctuations. Signal routing, shielding, and grounding should follow the site’s installation practices.
- Perform continuity checks when an open circuit or intermittent thermocouple connection is suspected.
- Keep the termination area clean and dry to reduce contamination and connection problems that can affect low-level signals.
- Perform loop checks after installation or replacement to confirm correct channel assignment and temperature response.
- Record wiring and maintenance results after the work is completed so the installed signal path remains traceable for future service.
Compatible System Components
| Component | Function |
|---|---|
| Foxboro FBM202 Thermocouple/mV Input Module | Acquires and processes signals connected through the termination assembly. |
| Thermocouples | Generate temperature-dependent millivolt signals. |
| Millivolt Signal Sources | Provide low-level analog measurement signals. |
| Thermocouple Extension / Compensating Cable | Carries thermocouple signals between the sensor and termination point. |
| I/A Series 200 Fieldbus Modules | Provide process I/O interfacing within the control system. |
| I/A Series Control Processors | Use acquired temperature information for control and monitoring. |
| I/A Series Operator Interfaces | Display measurements, alarms, and process trends. |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Foxboro FBM202 P0916AC | Thermocouple/mV Input Termination Assembly | Field termination for thermocouple and mV inputs |
| Foxboro FBM202 | Thermocouple/mV Input Module | Low-level temperature and mV signal acquisition |
| Foxboro I/A Series 200 Termination Assemblies | Field Termination Hardware | Connection between field wiring and I/O modules |
| Foxboro I/A Series 200 FBM Family | Fieldbus Modules | Process signal acquisition and interface |
| Foxboro I/A Series Temperature Input Components | Temperature I/O Hardware | Thermocouple-based process measurement |
Key Advantages
- Provides a dedicated termination point for thermocouple and millivolt input circuits.
- Keeps low-level field wiring organized within the control cabinet.
- Interfaces directly with the associated FBM202 input architecture.
- Simplifies channel identification and loop-check activities.
- Supports practical troubleshooting of the complete thermocouple signal path.
Technical FAQs
What is the Foxboro FBM202 P0916AC used for?
The FBM202 P0916AC is a Thermocouple/mV Input Termination Assembly used to terminate field wiring associated with compatible FBM202 input hardware in an I/A Series 200 system.
Does the P0916AC termination assembly process the thermocouple signal?
No. It provides the physical field wiring interface. The associated FBM202 input module performs the electronic acquisition and processing of the thermocouple or millivolt signal.
Why is the termination assembly important for thermocouple measurements?
Thermocouple signals are low-level electrical signals, so connection quality matters. Incorrect polarity, loose terminals, unsuitable wiring, or poor connections at the termination point can affect the measurement received by the FBM202.
What should be checked when replacing an FBM202 P0916AC?
Verify the exact assembly and associated FBM202 configuration, document all existing conductor positions, check thermocouple polarity and wiring type, and inspect terminal condition. After installation, perform continuity and loop checks to verify correct channel operation.