43AP-FA42C-PC Foxboro Pneumatic Indicating Controller

Availability: 10 left in stock

Foxboro 43AP-FA42C-PC Pneumatic Indicating Controller The Foxboro 43AP-FA42C-PC, also cataloged as the 43AP Indicating Controller, operates as a dedicated hardware...

SKU: 43AP-FA42C PC-00

Manufacturer: Foxboro
Product No.: 43AP-FA42C PC-00
Product Type: Indicating Controllers
Product Origin: USA
Payment:T/T, Western Union
Weight: 4800g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Foxboro 43AP-FA42C-PC Pneumatic Indicating Controller

The Foxboro 43AP-FA42C-PC, also cataloged as the 43AP Indicating Controller, operates as a dedicated hardware component for proportional plus integral pneumatic loop execution within process control systems. The instrument senses physical pressure signals via an internal bellows receiver and generates a calibrated pneumatic output to drive final control elements directly.

Hardware Specifications

Parameter	Specification
Model	43AP-FA42C-PC
Brand	Foxboro (Schneider Electric)
Origin	USA
Weight	4.8 kg
Dimensions	Standard 43AP field-mount case profile
Operating Temp	-40 deg C to +85 deg C
Power Consumption	Fully pneumatic (No electrical power required)
Supply Pressure	20 psi to 45 psi clean, dry instrument air
Output Signal	3 psi to 15 psi pneumatic signal
Control Action	Proportional plus Integral (A4: 0.01 to 50 min/repeat)
Measuring Element	PC - Pressure receiver, bellows
Mounting Type	Field mounting (Pipe or Yoke)

4-20 mA HART Loop Protocol & Pneumatic Conversion Integration

The 43AP-FA42C-PC processes differential pressure inputs mechanically, using its internal bellows unit to shift internal flapper-nozzle mechanisms without requiring electrical power. When integrated into hybrid automation networks, the standardized 3 psi to 15 psi output signal couples directly to current-to-pressure (I/P) transducers or pressure transmitters operating on the 4-20 mA HART loop protocol. This mechanical-to-pneumatic baseline ensures continuous feedback control across isolated process loops where electrical switching introduces intrinsic safety hazards.

Frequently Asked Questions

Q: How does the bumpless automatic-to-manual transfer switch function on this unit?

A: The integrated C-option transfer mechanism utilizes a two-position switch, a balance gauge, and a manual regulator. Operators align the manual regulator output with the automatic control pressure on the balance gauge before throwing the switch, preventing process surges during mode transfers.

Q: What air quality standard is required to operate the internal nozzle-flapper mechanism?

A: The controller requires clean, dry, oil-free instrument air filtered to industrial standards at supply pressures between 20 psi and 45 psi to prevent orifice clogging and calibration drift.

Q: Can this controller be mounted directly onto a process pipe?

A: Yes, the F-suffix mounting configuration allows direct field installation using a standard 2-inch vertical or horizontal pipe yoke assembly.

Field Installation Guidelines

Follow these core mechanical and pneumatic installation guidelines during field setup:

Secure the controller to a stable 2-inch pipe yoke or flat mounting structure using the provided steel mounting hardware.
Connect the clean instrument air supply line to the 1/4 NPT supply port, verifying that line pressure stays within the 20 psi to 45 psi operating range.
Thread the process measurement piping into the bellows pressure receiver connection using appropriate thread sealant.
Route the 3 psi to 15 psi output signal tubing directly to the control valve actuator or signal converter, verifying all pneumatic connections are leak-tight.
Set the internal proportional band and integral reset knobs to match the baseline time constants of the controlled process loop before opening the air supply line.

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