Product Overview
The Foxboro P0916AC is an 8-channel Compression Termination Assembly engineered specifically for the FBM202 Thermocouple/mV Input Module in the I/A Series 200 and Foxboro Evo Distributed Control Systems . It provides secure, vibration-resistant termination points for eight isolated thermocouple/millivolt input channels and incorporates a 4-wire 100 Ω platinum RTD (IEC 751, Class B) for reference junction (cold junction) temperature compensation .
Functioning as a passive DIN rail-mounted component, the P0916AC contains no internal signal processing electronics. All thermocouple/mV signal conversion, analog-to-digital conversion, and communication are performed by the FBM202 module; the P0916AC simply provides the physical termination interface between field wiring and the FBM via a dedicated termination cable .
The P0916AC is a legacy component that has been superseded by RH916XH and P0916XH in newer catalogs . It remains available through aftermarket suppliers as new original or new surplus stock for spare-part replacement in existing I/A Series installations. It is also referenced in DeltaV Flex.Connect migration solutions as the termination assembly for connecting FBM202 thermocouple/mV inputs to DeltaV CHARM terminal blocks .
Technical Specifications
Compatible FBM202 Module Specifications
Data source: I/A Series FBM202 hardware specification
Key Features & Benefits
Integrated Reference Junction Compensation
The P0916AC incorporates a 4-wire 100 Ω platinum RTD (IEC 751, Class B) for cold junction temperature compensation at the terminal assembly . This eliminates the need for external reference junction hardware, reduces wiring complexity, and improves thermocouple measurement accuracy by sensing the actual terminal temperature where thermocouple wires are connected.
Purpose-Built for Thermocouple/mV Signals
The P0916AC is specifically designed for low-level thermocouple and millivolt signal transmission. Its construction is optimized to preserve signal integrity for the microvolt-level signals produced by thermocouples, where electrical noise and cable-induced errors can significantly degrade measurement accuracy . It must NOT be used with standard discrete I/O modules (FBM240/FBM241d/FBM242) or FoxCom modules (FBM243/FBM246) — pin definitions are different and mismatched TAs will cause equipment malfunction .
Eight Isolated Input Channels
The termination assembly supports eight isolated thermocouple/mV input channels, each providing galvanic isolation from other channels and ground through the associated FBM202 module. Each channel provides thermocouple burnout detection (upscale) for immediate notification of sensor failures or broken wiring .
Passive Termination Design
The P0916AC contains no active electronics — it is a passive wiring interface that relies entirely on the FBM202 module for signal processing. This design eliminates a potential failure point, as there are no internal circuits to degrade or malfunction .
Compression Terminal Technology
The P0916AC utilizes compression screw terminals designed to provide gas-tight, vibration-resistant connections that eliminate the need for periodic retorquing. The terminal blocks accept 0.2 to 4 mm² (24 to 12 AWG) solid or stranded copper conductors .
DIN Rail Mounting
The P0916AC mounts on standard DIN rail (compatible with both 32 mm and 35 mm rails), allowing flexible placement within the control cabinet. The termination assembly connects to the FBM202 baseplate via a removable Type 2 termination cable available in lengths up to 30 meters (98 feet) .
Modular Architecture for Simplified Maintenance
The FBM202 module can be replaced without disconnecting field wiring from the P0916AC termination assembly. Field wiring remains secured on the P0916AC while the module is swapped, minimizing downtime and reducing the risk of wiring errors during maintenance .
DeltaV Migration Compatibility
The P0916AC termination assembly supports DeltaV Flex.Connect solutions for migration from Foxboro I/A Series to DeltaV systems. It enables direct connection from the I/A Series 200 termination assembly to DeltaV Thermocouple/mV CHARM terminal blocks .
Important Note: Emerson recommends re-wiring thermocouple signals directly to DeltaV AI-T/C solutions rather than using pass-through migration for thermocouple inputs .
Recommended Related Models
Compatible FBM202 Module Specifications:
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8 isolated thermocouple/mV input channels
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1 isolated RTD reference junction compensation channel
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Thermocouple types: B, E, J, K, N, R, S, T
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Input range: –10.5 to +69.5 mV DC
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Accuracy: ±0.03% of span (mV input)
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Redundant 2 Mbps Fieldbus
Frequently Asked Questions (FAQ)
Q1: Is the P0916AC a PLC module?
No. The P0916AC is a Termination Assembly (TA) — a passive wiring interface, not an active PLC module. It contains no processing electronics and performs no signal conversion. The FBM202 module (P0926EQ) is the actual Fieldbus Module that processes thermocouple/mV signals .
Q2: What is the difference between P0916AC and P0926EQ?
P0916AC is the termination assembly (terminal block) that mounts on DIN rail and provides field wiring connections for thermocouple/mV sensors. P0926EQ is the FBM202 module itself — the active Fieldbus Module that performs signal conversion and communicates with the control processor .
Q3: What module does the P0916AC work with?
The P0916AC is designed specifically for the FBM202 Thermocouple/mV Input Module . It is not interchangeable with termination assemblies for other FBM types. Critical: The P0916AC must NOT be used with FBM240/FBM241d/FBM242 discrete I/O modules or FBM243/FBM246 FoxCom modules — pin definitions differ and mismatched TAs will cause equipment malfunction .
Q4: What thermocouple types does the P0916AC/FBM202 support?
The P0916AC with the FBM202 supports B, E, J, K, N, R, S, and T type thermocouples, as well as other millivolt signals within the –10.5 to +69.5 mV range .
Q5: Does the P0916AC provide reference junction compensation?
Yes. The P0916AC incorporates a 4-wire 100 Ω platinum RTD (IEC 751, Class B) that provides reference junction (cold junction) temperature compensation at the terminal assembly. This ensures accurate thermocouple measurements by sensing the actual terminal temperature where thermocouple wires are connected .
Q6: What is the difference between P0916AC and P0916AD?
P0916AC uses compression screw terminals for field wiring. P0916AD uses ring lug terminals. Both are electrically equivalent and compatible with the FBM202; the choice depends on field wiring termination preferences .
Q7: What is the difference between P0916AC and P0916XH?
P0916AC is made of PVC (Polyvinyl Chloride) rated for –20°C to +50°C. P0916XH is made of Polyamide (PA) rated for –20°C to +70°C, providing a higher temperature rating for more demanding environments .
Q8: Is the P0916AC still available?
The P0916AC is a legacy component that has been superseded by RH916XH and P0916XH . It remains available through aftermarket suppliers as new original or new surplus stock for spare-part replacement in existing I/A Series installations .
Q9: Can I hot-swap the FBM202 without disconnecting field wiring from the P0916AC?
Yes. The modular architecture allows the FBM202 module to be replaced while leaving field wiring intact on the P0916AC termination assembly. The termination cable can be disconnected from the baseplate, allowing module replacement without disturbing field connections .
Q10: Does the P0916AC support DeltaV migration?
Yes. The P0916AC supports DeltaV Flex.Connect solutions for migration from Foxboro I/A Series to DeltaV systems. It enables direct connection to DeltaV Thermocouple/mV CHARM terminal blocks. However, Emerson recommends re-wiring thermocouple signals directly to DeltaV AI-T/C solutions rather than using pass-through migration for thermocouple inputs .
Q11: What certifications does the P0916AC hold?
The P0916AC is a Type 1 termination assembly: UL/UL-C listed for Class I, Groups A-D, Division 2, T4 hazardous locations and CENELEC (DEMKO) certified as EEx nA IIC T4 for Zone 2 potentially explosive atmospheres .
Q12: Does this product come with a warranty?
Yes. This offering includes a 1 Year (12-month) Warranty on the P0916AC termination assembly. Verify warranty terms with your supplier before purchase .
Q13: What is the complete configuration for a thermocouple input loop?
A complete FBM202 thermocouple input loop requires:
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FBM202 module (P0926EQ)
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P0916AC termination assembly (this product)
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Type 2 termination cable (e.g., P0916DC, 3 m)
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Field thermocouple wiring
