Proportional Multiplier

Product Specifications

Technical details and manufacturing context for Proportional Multiplier

Definition

The Proportional Multiplier is a fundamental computational element within the Proportional-Integral-Derivative (PID) Algorithm Unit. It receives the instantaneous error signal (difference between setpoint and process variable) and applies the proportional gain coefficient (Kp) to produce the proportional term of the controller's output. This term provides an immediate corrective action proportional to the current error, forming the 'P' component of the PID control law. Its output is summed with the integral and derivative terms to form the final control signal sent to the actuator. The component operates by performing a real-time multiplication operation. It takes two primary inputs: 1) the error value (e(t)) from the comparator, and 2) the user-defined or auto-tuned proportional gain constant (Kp). The multiplier calculates the product (Kp * e(t)), which represents the proportional control action. This calculation is typically performed by an analog operational amplifier circuit configured for multiplication or by a digital arithmetic logic unit (ALU) within a microcontroller or programmable logic controller (PLC) executing the PID algorithm. The component is typically implemented on a printed circuit board (PCB) with copper conductors and semiconductor components. It is designed for industrial environments, with a supply voltage of 24 V DC (±10%), input and output signal ranges of 4–20 mA, and an adjustable proportional gain range of 0.1–100. It offers a linearity error of ±0.5% of full scale, a response time of ≤10 ms for a step input, and operates over a temperature range of -40 to 85 °C. The storage temperature matches the operating range, and the humidity range is 5–95% non-condensing. The ingress protection rating is IP54–IP65 per IEC 60529, depending on the enclosure. Weight varies with model, typically 0.5–1.5 kg, and dimensions are typically 100×80×60 mm (W×H×D). These specifications are reference values; verify model-specific details with the manufacturer.

Working Principle

The Proportional Multiplier computes the product of the error signal e(t) and the proportional gain Kp. The error signal is derived from the difference between the setpoint and the process variable. The gain Kp is adjustable, typically within a range of 0.1 to 100. The multiplication is performed in real time using analog or digital circuitry. The output is the proportional term, which is then combined with integral and derivative terms to form the control signal. This component is essential for providing immediate corrective action proportional to the current error.

Common Materials

Semiconductor (Silicon), Printed Circuit Board (PCB), Copper Conductors

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	24 ±10% V DC	Standard industrial voltage
Input Signal Range	4–20 mA	Typical analog input
Output Signal Range	4–20 mA	Proportional to input
Proportional Gain Range	0.1–100	Adjustable
Linearity Error	±0.5 % FS	Full scale
Response Time	≤10 ms	For step input
Operating Temperature	-40–85 °C	Industrial grade
Storage Temperature	-40–85 °C	Same as operating
Humidity Range	5–95 % RH	Non-condensing
Ingress Protection	IP54–IP65	Depends on enclosureIEC 60529
Weight	0.5–1.5 kg	Varies with model
Dimensions (W×H×D)	100×80×60 mm	Typical

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Multiplier Circuit / ALU
Performs the arithmetic multiplication of the error signal and the gain coefficient.

Material: Semiconductor
Gain Coefficient Register Part
Stores the user-configured or dynamically adjusted proportional gain value (Kp).

Material: Semiconductor Memory
Input Buffer
Conditions and holds the incoming error signal for stable multiplication.

Material: Semiconductor
Output Driver
Amplifies and transmits the calculated proportional term to the summing junction.

Material: Semiconductor

Applied To / Applications

This component is essential for the following industrial systems and equipment:

PID Algorithm Unit

View system integration details

Manufacturers of Proportional Multiplier

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Frequently Asked Questions

What is the function of the Proportional Multiplier in a PID controller?

It multiplies the error signal by the proportional gain (Kp) to produce the proportional control action, which is the 'P' term in the PID algorithm.

What are the typical input and output signal ranges?

The typical input and output signal ranges are 4–20 mA, as listed in the directory reference.

What is the adjustable proportional gain range?

The adjustable proportional gain range is 0.1–100, as per the directory reference.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C, as listed in the directory reference.

Data Basis

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Preliminary Technical Classification

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pressure:	0 to 10 bar
other spec:	Signal range: 0-10V or 4-20mA, Response time: <10ms
temperature:	-40°C to +85°C

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