Foxboro FBMSVH Pneumatic Valve Positioner

Description

The Foxboro FBMSVH is a high-precision pneumatic valve positioner. It effectively controls valve positions in response to control signals, ensuring optimal process performance. Its design delivers accurate valve positioning, crucial for maintaining stability and efficiency in various industrial processes. Additionally, it excels in harsh environments due to its rugged stainless-steel housing and resistance to aggressive conditions.

Key Features

High Accuracy: Ensures precise valve positioning, directly enhancing process efficiency.
Fast Response: Reacts quickly to input control signals, minimizing delays.
Easy Installation: Integrates seamlessly into existing systems, reducing setup time.
Durable Construction: Features stainless steel housing, providing excellent resistance to tough industrial conditions.
Adjustable Range: Compatible with various valve types and sizes, offering flexibility in installation.

Technical Specifications

Parameter	Value
Manufacturer	Foxboro
Model Number	FBMSVH
Input Signal	4-20 mA
Output Signal	Pneumatic (3-15 psi)
Power Supply	24 VDC
Operating Temperature Range	-20°C to 60°C
Storage Temperature Range	-40°C to 70°C
Housing Material	Stainless Steel
Weight	2 kg (Approx.)

Overview

The Foxboro FBMSVH is built for closed-loop control systems. It precisely regulates pneumatic or hydraulic servos by accepting input signals within the range of 4-20 mA or 0-10 VDC. Feedback input is derived from an LVDT with a 0-10V signal. The system processes the DEH command and LVDT feedback voltage using P or P+I regulation. Subsequently, it outputs a ±27 mA current, which drives the servo valve.

The module requires an external +15V power supply, which connects to the input terminals. This power supply enhances the module’s flexibility and ensures smooth operation. The FBMSVH offers customization options, allowing users to select between current or voltage inputs. It also features a modulator and demodulator with adjustable amplitude and current for optimal performance.

Selectable Features

Current or Voltage Input: Choose between current or voltage input, with adjustable zero points and full-scale ranges via the S2 switch.
LVDT Modulator and Demodulator: Includes an LVDT modulator and demodulator for precise valve control, with a 50 mA driving current.
Output Signals: Capable of outputting a 0-20 mA valve position signal with 500Ω impedance.
External Shutdown Contacts: Allows for external shutdown contacts, improving safety and control.
Adjustable Proportional and Integral Control Loops: Provides P and I loops for customized control.

Additional Technical Specifications

Parameter	Value
Command Input	4-20 mA / 0-10 VDC
Input Impedance (Current)	5000 Ω
Input Impedance (Voltage)	4.3 KΩ
Maximum Command Current	21 mA
Maximum Command Voltage	11.0 VDC
Power Supply Voltage	+15 VDC
Voltage Regulation Accuracy	±1%
Ripple/Noise	±1%
Power Consumption	250 mA (±15 V Power Supply)

Applications

The Foxboro FBMSVH excels in precise control of pneumatic and hydraulic servos. It is ideal for industries requiring consistent valve positioning, such as:

Industrial Automation: Ensures accurate valve control in automated systems.
Process Control: Perfect for industries such as chemical processing, oil and gas, and power generation.
Flow Control: Helps regulate fluid flow in various applications.

Why Choose the Foxboro FBMSVH?

The Foxboro FBMSVH stands out for its accuracy, reliability, and speed. It provides quick response times to control signals, ensuring consistent process control. Moreover, its rugged stainless-steel housing ensures long-lasting performance, even in the most demanding environments. Whether you need to control pneumatic or hydraulic servos, this valve positioner offers excellent flexibility and precision.