Keypads

Keypads are input devices comprising a set of buttons or keys arranged in a grid-like pattern, where each button typically corresponds to a specific character, number, or function.

They are commonly used for data entry, control interfaces, and security systems and can be found on various devices, such as telephones, calculators, remote controls, ATMs (Automated Teller Machines), and security access panels.

Whether it's a computer numpad, access control number pad, or a dedicated numeric keypad on industrial equipment, users interact by pressing the appropriate buttons to input data or execute commands.

Difference between Keypad and Keyboard

While both are input devices, keypads offer a more compact, specialised interface primarily for numerical or specific function entry. As such, keypads are ideal for focused data input, such as in an ATM keypad or a security keypad.

Meanwhile, keyboards provide a full alphanumeric layout, designed for comprehensive text input and broader command execution. This makes them suited to facilitate general computing tasks.

What are the Benefits of Keypads?

Ease of Input

Keypads offer a straightforward and intuitive means of inputting data, whether for numeric values, text, or commands. Their tactile buttons provide clear feedback, reducing errors and making data entry effortless for users.

Speed and Efficiency

Keypads allow for rapid data entry, particularly when compared to alternative input methods like touchscreens or handwriting recognition.

The distinct, organised buttons allow for quick and precise keystrokes, significantly boosting operational efficiency in environments where speed is critical, such as in industrial control systems.

Familiarity and User-Friendliness

The layouts of many keypads, such as those found on telephones or calculators, are widely recognised, contributing to their inherent user-friendliness.

This familiarity means users can quickly adapt to new devices featuring keypads without needing extensive training.

Durability and Reliability

Keypads are engineered for robust performance and designed to withstand repeated use, rigorous use.

For example, industrial keypads are built with sturdy materials to endure harsh conditions, ensuring long-term reliability.

Security and Privacy

Keypads are commonly integrated into security systems for secure data entry, such as PIN codes or passwords.

Different Types of Keypads

Numeric Keypad

A numeric keypad primarily features numerical digits (0 to 9), arranged in ascending order from left-to-right, top to bottom. This means 1, 2, and 3 appear at the top row while 7, 8, and 9 appear at the bottom.

Its compact design is ideal for focused data entry in various devices, such as point-of-sale (POS) terminals and standalone accessories for laptops without integrated numpad keyboards.

Calculator Keypad

Designed specifically for mathematical calculations, calculator keypads feature a grid of numeric digits, arithmetic operators (+, -, *, /), and a decimal point. Unlike numeric keypads, the numbers are usually arranged in descending order. This means 7, 8, and 9 appear on the top row, while 1, 2, 3 appear at the bottom.

Function keys like ‘equals’ and ‘clear’ are standard, while scientific calculators may include more complex mathematical functions for specialised calculations.

Telephone Keypad

The telephone keypad, or dial pad, consists of a 12-button grid, typically displaying digits 0 to 9 alongside '*' and '#' symbols. Some versions also include 'A', 'B', 'C', and 'D' for extended functionality.

This familiar layout is universally used in telephone systems and mobile phones for dialling and basic menu navigation.

QWERTY Keypad

Resembling a full computer keyboard layout, the QWERTY keypad includes alphabets, numbers, and various symbols. This type of keyboard keypad is commonly found on smartphones, computers, and other mobile devices, facilitating text input and communication.

For example, ergonomic QWERTY keyboards are popularly used in home office setups to promote comfortable typing.

ATM Keypad

Keypads for ATMs are built for secure and intuitive financial transactions. They typically consist of a grid of numeric digits, navigation buttons like ‘Enter’ and ‘Cancel’, and additional options for selecting various banking functions.

Control Panel Keypad

Keypads used in control panels or security systems often combine numeric keys with specific function buttons. These may include controls for arming or disarming systems, emergency alerts, status indicators, and user-defined operations.

For instance, a security keypad provides an essential interface for managing industrial machinery or access points.

Door Hardware Keypad

A door hardware keypad is integrated directly into door locking mechanisms, allowing keyless entry via a numerical code. These durable keypads are commonly used for residential and commercial access control, offering enhanced security and convenience over traditional keys.

Membrane Keypad

A membrane keypad is a flat, flexible interface where symbols are printed on a thin, pressure-sensitive membrane. When pressed, electrical contacts beneath the surface complete a circuit.

These keypads are durable, often waterproof, and ideal for harsh environments or medical equipment where cleanliness is vital.

Available Case Materials for Keypads

The keypad case or housing is the outer shell that protects the internal electronic components and provides the user interface. These cases are available in various materials, each offering specific benefits for its application.

Stainless Steel

Stainless steel keypads are highly durable and offer exceptional resistance to corrosion, harsh chemicals, and vandalism.

Their robust nature makes them ideal for public access points, outdoor installations, and environments requiring stringent hygiene, such as food processing or medical facilities.

ABS

ABS (Acrylonitrile Butadiene Styrene) is a common thermoplastic known for its good impact resistance and relatively low cost.

ABS keypad cases are versatile and widely used in consumer electronics, remote controls, and light-duty industrial applications where a balance of durability and affordability is needed.

Aluminium

Aluminium keypad cases are lightweight and robust, offering excellent corrosion resistance and good thermal conductivity for heat dissipation.

They are often chosen for applications requiring a sleek aesthetic or where weight is a critical factor, such as portable devices and certain industrial control panels.

Conductive Silver

Keypad cases with conductive silver components are typically used to create electrical pathways or shielding within the keypad structure.

This material ensures reliable contact for keys and provides electromagnetic compatibility (EMC) protection, vital for sensitive electronic equipment.

Copper

Copper, known for its superior electrical conductivity, is sometimes incorporated into keypad designs for specific applications. Its use can enable more reliable key presses, enhance signal integrity, and lead to faster response times.

Die Cast Zinc

Die cast zinc offers high strength, durability, and dimensional stability. Keypad cases made from this material are robust and resistant to impact, making them suitable for control panels and industrial equipment.

PC

Polycarbonate (PC) is a tough, transparent thermoplastic material known for its high impact strength and optical clarity. PC keypad cases are often used when a clear or backlit display is required, providing both protection and visual appeal for user interfaces.

Plastic

Plastic keypad cases encompass a broad range of polymers, offering versatility in design, colour, and cost. They are lightweight, non-conductive, and can be easily moulded into complex shapes, making them ubiquitous in consumer electronics, remote controls, and many general-purpose industrial applications.

Polyester

Polyester is a flexible and durable material frequently used for the overlay of membrane keypads. It offers excellent chemical resistance and can withstand repeated actuation, making it ideal for robust, sealed user interfaces in demanding environments.

Polymer

Polymer keypad housings provide a balance of flexibility, durability, and chemical resistance. These materials are versatile, allowing for various designs and textures, often found in industrial handheld devices and medical equipment where specific tactile feedback is desired.

ZAMAK

ZAMAK (Zinc, Aluminium, Magnesium, and Copper alloy) is a family of zinc-based alloys known for their strength, hardness, and excellent casting properties.

These keypad cases offer a premium feel and superior durability, often used in high-end consumer electronics and security devices like door hardware keypads.

Industrial Applications of the Keypad

Keypads are ubiquitous in modern industry, providing essential human-machine interfaces across a diverse range of sectors.

Telecommunications

In the telecommunications industry, keypads are crucial for data entry and system configuration on various devices.

From network equipment to landline phones, they facilitate input. For instance, a numeric keypad allows technicians to program network switches or enter codes for service activation.

Financial Services

Financial services extensively utilise keypads for secure data entry in ATMs and POS terminals. For example, the robust design of an ATM keypad ensures reliable and secure input for PINs and transaction details, crucial for consumer trust.

Security Systems

Keypads are fundamental to modern security systems, providing secure access control for buildings, gates, and restricted areas. For instance, a door hardware keypad allows coded entry, while a robust security keypad with tactile feedback ensures accurate PIN input in alarm systems.

Industrial Control Systems

In industrial settings, keypads serve as the primary interface for operating machinery and control panels. An industrial keypad often includes durable, sealing features, such as membranes, to withstand harsh environments and provide reliable input for complex processes.

Automation and Home Control

Keypad systems are increasingly integrated into automation and smart home control setups, providing intuitive interfaces for managing lighting, climate, and security.

Medical Equipment

The medical field relies on keypads for precise data input and control in various diagnostic and treatment devices.

Sterilisable and easy-to-clean designs, such as membrane keypads, are vital for maintaining hygiene in patient monitoring systems and laboratory equipment.

Remote Controls

Keypads are integral to remote controls for a vast array of devices, from televisions and air conditioners to industrial cranes. Their simple button layouts enable convenient and intuitive command execution from a distance.

Automotive

In the automotive industry, keypads are found in various applications, including infotainment systems, vehicle access, and climate control. A durable keypad with numbers might be used for keyless entry or to manage navigation systems.

Buy Keypad from RS Australia

RS Australia is a trusted supplier and distributor of keypads, providing a comprehensive selection of these essential input devices at competitive prices. Our products are sourced from leading brands like Storm, APEM, EOZ, and Phoenix Contact, ensuring high-quality options for every customer.

Apart from keypads, we also offer a wide array of other switches, including tactile switches, push button switches, and emergency push buttons, to meet all electrical control needs.

Buy your product on our user-friendly online site and have your items shipped to your door. With our flexible delivery options, we ensure you receive your shipment efficiently and at your convenience. For more details on delivery times and fees, please consult our delivery information page.