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Foxboro P0916BT Termination Assembly

The Foxboro P0916BT, also cataloged as the P0916BT Termination Assembly, operates as a dedicated hardware component for field wiring distribution and signal conditioning within Foxboro I/A Series and Evo DCS platforms. The unit forms the direct physical termination interface for external 4-20 mA current loops routed to the secondary FBM211 analog input module.

Hardware Specifications

Parameter Specification
Model P0916BT
Brand Foxboro (Schneider Electric)
Origin USA
Weight 0.61 lbs
Dimensions Standard 200 Series assembly profile
Operating Temp -40 to +70 deg C
Power Consumption Max 8.5 W
Channel Capacity 16 independent analog input channels
Signal Type Standard 4-20 mA current loop
Wire Termination Screw-clamp terminals (12-22 AWG)
Mounting DIN rail with locking mechanism
Enclosure Rating IP20 (cabinet installation required)
Memory 16 MB SDRAM, 32 MB Flash (for local data handling)
Isolation Channel-to-channel and channel-to-ground isolation

Process Control & DCS Instrumentation Properties

The termination assembly utilizes channel-to-channel isolation parameters to isolate physical field sensor signals from the primary backplane processing logic, preventing common-mode noise propagation. The electrical architecture of the 16 independent channels accommodates the 4-20 mA HART loop protocol, allowing high-frequency digital communication signals to pass unimpeded to the FBM211 subsystem. Cold junction compensation (CJC) biasing circuits are embedded into the substrate layer to stabilize millivolt inputs when encountering thermal variations across the terminal blocks.

Frequently Asked Questions

Q: Can the FBM211 module connected to this assembly be replaced while the system is under power?

A: Yes, the hot-swappable architecture allows connected Fieldbus Modules to be extracted or inserted without disconnecting the permanent field wiring terminated on the P0916BT block and without interrupting the operational state of the DCS.

Q: What are the cable distance constraints between the field transmitter and the termination assembly?

A: The physical layer supports maximum cable runs up to 1000 m (3280 ft), provided the interconnecting field cable meets standard gauge requirements (12-22 AWG) and incorporates continuous, single-ended shielding.

Field Installation Guidelines

  • DIN Rail Mounting: Snap the assembly onto standard symmetric DIN rails, ensuring the integrated locking mechanism is completely engaged to prevent physical shifting during high-vibration events.
  • Shield Grounding: Strip field cables and secure the drain wires directly to the master instrumentation ground bar within the enclosure panel. Do not terminate field shields at both the transmitter end and the P0916BT assembly.
  • Conductor Sizing: Strip field wire insulation to specified tolerances and secure into the screw-clamp blocks using 12-22 AWG copper conductors, applying factory-rated torque limits to all terminal screws.

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