Foxboro P0916AC I/A Series 8 Channel TC/mV Compression Terminal Assembly

Description

Key Technical Specifications

Parameter	Value
Manufacturer	Foxboro
Part Number	P0916AC
Associated FBM	FBM202
Product Type	Compression Terminal Assembly
System Platform	Foxboro I/A Series 200 Series
Signal Type	Thermocouple / Millivolt Input
Input Channels	8 channels
Terminal Style	Compression screw terminals
Field Interface	Temperature transmitter and sensor wiring
Compatible Signals	TC, mV level signals
Installation	Foxboro 200 Series I/O mounting arrangement
Application	Temperature measurement loops
Used With	FBM202 analog input fieldbus module
Replacement Category	Legacy spare part

 

Product Introduction

The Foxboro P0916AC is a Compression Terminal Assembly designed for use with the FBM202 8-channel thermocouple/millivolt input module in Foxboro I/A Series 200 Series distributed control systems. It provides the physical connection point between field temperature sensors and the FBM202 input electronics.

Unlike an active I/O module, the P0916AC does not perform signal processing. Its function is field termination, signal routing, and connection management. The associated FBM202 performs the analog-to-digital conversion and communicates temperature measurements to the I/A Series control system.

This component remains relevant in plants maintaining legacy Foxboro I/A Series installations where replacing the complete I/O architecture is not practical. Maintaining spare termination assemblies helps reduce downtime during field wiring repairs or I/O maintenance activities.

P0916AC

P0916AC

P0916AC

 

Installation & Replacement Guide

 

Stage 1: Pre-Installation Preparation

⚠️ Safety First

Before replacing a :

1. Confirm the affected temperature loops.
2. Notify operations before interrupting measurement signals.
3. Place related control loops into a safe operating condition.
4. Isolate field power where required.
5. Verify the replacement part number.

Tools Required

• ESD wrist strap
• Screwdriver set
• Digital multimeter
• Wire labels
• Camera for wiring documentation

Record Before Removal

Document:

• FBM202 module location
• Terminal numbering
• Thermocouple type
• Sensor polarity
• Channel assignments
• Existing alarm conditions

⚠️ Important:
Thermocouple wiring polarity must be maintained. Reversed polarity can produce incorrect temperature readings.

 

Stage 2: Removing Existing

Estimated Time: 10 minutes

1. Open the Foxboro I/A Series cabinet.
2. Identify the termination assembly.
3. Photograph all wiring connections.
4. Label each field cable.
5. Disconnect field wires carefully.
6. Remove the termination assembly from the mounting position.

Inspect:

• Terminal screws
• Connector contacts
• Wire condition
• Signs of corrosion or overheating

 

Stage 3: Installing Replacement

Estimated Time: 15 minutes

1. Verify:

   Foxboro → compatible

2. Inspect replacement:
   • Terminal condition
   • Connector integrity
   • Physical damage
3. Install the termination assembly.
4. Reconnect field wiring according to the original documentation.
5. Tighten terminal connections.
6. Verify sensor polarity.

Installation Checklist

☐ Correct TA model installed
☐ compatibility confirmed
☐ Thermocouple type verified
☐ Wiring labels matched
☐ Terminal connections secured

 

Stage 4: Testing & Commissioning

After installation:

1. Restore system operation.
2. Verify communication.
3. Check all eight input channels.
4. Confirm temperature values.

Recommended tests:

• Compare displayed temperature with field instrument reading.
• Verify correct engineering units.
• Check high/low alarms.
• Confirm no open sensor alarms.

 

Troubleshooting Guide

 

Problem: Temperature Reading Incorrect

Check:

• Thermocouple polarity
• Sensor type configuration
• Wiring continuity
• Channel assignment

 

Problem: Channel Shows Open Circuit

Check:

• Loose terminal screws
• Broken thermocouple wire
• Incorrect termination wiring
• Damaged sensor

 

Problem: Offline

Check:

• FBM module status
• Fieldbus communication
• Baseplate connection
• Controller configuration

 

Frequently Asked Questions (FAQ)

Q1: What is Foxboro ?

is a Foxboro I/A Series Compression Terminal Assembly used with the 8-channel thermocouple/millivolt input module.

Q2: Is an active control module?

No. is a passive termination assembly. The module performs signal conversion and communication functions.

Q3: What signals does support?

It is designed for thermocouple and millivolt input connections, typically used for temperature measurement applications.

Q4: Can replace P0916AA?

No. These termination assemblies support different FBM types and signal configurations.

• P0916AA → FBM201, 8 AI current input
• → , 8 AI TC/mV input

The termination assembly must match the installed FBM module.

Q5: Is Foxboro obsolete?

belongs to the legacy Foxboro I/A Series 200 I/O family. Many operating facilities continue using these systems, so replacement units are typically sourced through industrial automation spare inventories.

Q6: What should be checked before purchasing ?

Verify:

• Part number:
• Associated module:
• Signal type: TC/mV
• Number of channels: 8
• Existing termination wiring arrangement
• Physical condition and warranty

A visually similar Foxboro termination assembly may not match the required signal type.