Foxboro 43AP-FA42C/PC-OO Pneumatic Indicating Controller – Product Description

Description / Overview

The Foxboro 43AP-FA42C/PC-OO is a pneumatic indicating controller from the 43AP Series, designed for precise measurement and process control in industrial environments. It combines a high-accuracy mechanical indicator with a reliable pneumatic control mechanism, making it ideal for pressure, temperature, vacuum, and differential-pressure applications. Moreover, the force-balance mechanism provides long-term stability and consistent performance, even under challenging operating conditions. Its robust construction ensures dependable operation in industrial plants, allowing operators to maintain smooth and predictable process behavior.

Technical Data / Specifications

• Model: 43AP-FA42C/PC-OO

• Series: Foxboro 43AP Pneumatic Indicating Controllers

• Type: Pneumatic Indicating Controller

• Measured Variables: Pressure, Temperature, Vacuum, Differential Pressure

• Control Modes: On-off; proportional 4–400%; proportional + derivative 0.05–50 min; proportional + reset 0.01–50 min/repeat; PID; differential gap 1–100%

• Output Signal: 3–15 psi (20–100 kPa) pneumatic signal; gauge up to 30 psi (200 kPa)

• Accuracy: ±0.25% of span (typical)

• Span Adjustability: Wide range, up to 10:1

• Calibration: On-line, vernier adjustment

• Options: Remote pneumatic set point, auto/manual transfer, batch function, Type 70 electric contacts, valve mounting

• Operating Temperature: –40 °C to +85 °C

• Humidity Range: 5% – 95% non-condensing

• Protection Class: NEMA 3 enclosure (field mounting)

• Country of Origin: USA

• Mounting: Field (Pipe or Yoke, per element code)

• Elements Available: PC = Pressure receiver, bellows

• Weight: 4.8 kg

FAQ

Q1: What mechanism does the 43AP-FA42C/PC-OO use for control?
It uses Foxboro’s force-balance pneumatic mechanism to ensure precise and stable output.

Q2: Can this controller handle PID control?
Yes. It provides proportional, integral (reset), derivative, and differential gap modes for full PID loops.

Q3: What is the pneumatic output range?
The standard output is 3–15 psi (20–100 kPa), with a gauge reading up to 30 psi (200 kPa).

Q4: Is the auto/manual transfer bumpless?
Yes. The internal switch allows smooth transitions without process disturbances.

Q5: Can the unit operate in harsh industrial environments?
Yes. The NEMA 3 enclosure protects it from dust, moisture, and other field conditions.