43AP-FA42C-PC Foxboro Pneumatic Controller

Foxboro 43AP-FA42C-PC Series Pneumatic Indicating Controller

Foxboro 43AP-FA42C-PC Series Pneumatic Indicating Controller

التوفر: 10 متوفر في المخزون

Foxboro 43AP-FA42C-PC 43AP Pneumatic Indicating Controller Configured for dynamic pressure control and signal transmission in pneumatic loops, the Foxboro 43AP-FA42C-PC...

رمز المنتج: 43AP-FA42CPC

Manufacturer: Foxboro
Product No.: 43AP-FA42CPC
Product Type: Indicating Controllers
Product Origin: USA
Payment:T/T, Western Union
Weight: 4800g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

Foxboro 43AP-FA42C-PC 43AP Pneumatic Indicating Controller

Configured for dynamic pressure control and signal transmission in pneumatic loops, the Foxboro 43AP-FA42C-PC (43AP-FA42CPC Pneumatic Indicating Controller) provides direct physical execution across continuous process control networks. The controller receives process inputs via an internal pressure receiver bellows, displays live measurements on an integrated pointer scale, and generates a 3 to 15 psi pneumatic output signal. Built with field pipe or yoke mounting hardware, proportional plus integral (reset) control elements, and an internal bumpless automatic/manual transfer switch with balance gauge, the mechanism maintains loop stability without electrical power dependencies.

Suffix Breakdown & Model Matrix

43AP: Base model designation for field-mounted pneumatic indicating controllers.
F: Field mounting configuration designed for pipe or yoke installation.
A4: Control mode specifying proportional plus integral (reset) functionality, adjustable from 0.01 to 50 minutes per repeat.
2: Output signal and gauge configuration providing a 3 to 15 psi signal paired with a 30 psi output pressure gauge.
C: Internal bumpless automatic/manual transfer switching mechanism equipped with a 2-position switch, balance gauge, and regulator.
PC: Measuring element designated as a pressure receiver bellows.

Hardware Specifications

Parameter	Specification
Model	43AP-FA42C-PC
Brand	Foxboro
Origin	USA
Weight	4.8 kg (10.6 lbs)
Dimensions	Standard 43AP series enclosure dimensions
Operating Temp	-40 deg C to +80 deg C
Power Consumption	None (operated strictly via pneumatic supply air)
Product Type	Pneumatic Indicating Controller
Input Signal	Pressure via receiver bellows element (PC)
Output Signal	3 to 15 psi pneumatic signal (with 30 psi output gauge)
Supply Pressure	140 +/-1.4 kPa (20 +/-0.2 psi) clean, dry instrument air
Accuracy	+/-0.5% of span (input to pointer accuracy)
Repeatability	0.2% of span
Deadband	0.1% of span
Response Time	Under 1 s
Control Modes	Proportional plus Integral (0.01 to 50 min/repeat)
Mounting	Field mount (pipe or yoke)

Process Control & 4-20 mA Loop Architecture

The instrument integrates mechanical force-balance actuation with pneumatic signal output channels, completely bypassing electronic current loop circuitry to eliminate spark hazards. While digital platforms rely on 4-20 mA HART loop protocol configurations or Fieldbus connectivity, this controller processes mechanical bellows displacement directly to vary nozzle-flapper backpressure. Thermal expansion shifts are mitigated across wide operating windows, maintaining an input-to-pointer accuracy within +/-0.5% of span without requiring cold junction compensation. The internal manual-to-automatic transfer circuit utilizes an integrated balance regulator and dual-pressure gauge to equalize internal transfer pressures, enabling seamless bumpless switching between automatic loop control and manual signal override.

Frequently Asked Questions

Q: What specific air supply specifications are mandatory for operating the internal flapper-nozzle mechanism?

A: The module requires a clean, dry, oil-free instrument air supply regulated to 140 +/-1.4 kPa (20 +/-0.2 psi). Moisture or dirt particles in the supply line will plug internal orifices and disrupt output regulation.

Q: How is a bumpless transfer performed between automatic and manual control modes?

A: The operator turns the 2-position switch to the balance position, adjusts the internal manual regulator until the balance gauge needle aligns with the controller output pointer, and then flips the switch to the desired operating mode.

Field Installation Guidelines

Air Supply Quality: Install an upstream air filter-regulator to deliver clean instrument air at exactly 20 psi (140 kPa) before pressurizing the module.
Mounting Stability: Secure the chassis to a rigid vertical pipe or yoke support structure using standard mounting brackets to minimize mechanical vibration transmitted to the bellows assembly.
Pneumatic Tubing Connections: Ensure all pneumatic signal and supply lines connected to the 1/4 in NPT female ports are clear of burrs and sealed with thread tape applied away from the leading thread.
Pointer Zero Calibration: Equalize process pressure inputs and adjust the zero adjustment screw under atmospheric reference conditions to confirm accurate pointer alignment prior to loop startup.
Enclosure Sealing: Fasten the front cover latches securely following calibration to protect internal mechanical linkages from ambient moisture and dust accumulation.

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