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What Are Access Control Systems? An Introductory Guide

by | Mar 18, 2025 | Uncategorized

Access control systems keep your space safe from unwanted visitors by granting entry only to approved individuals. Entry can be as painless as a simple tap of your card. High-quality access control systems are cost-effective and secure, safeguarding assets and staff.

In today’s security landscape, access control systems are a vital part of your security toolkit. They define who can enter specific parts of your facility and what times they are allowed. All the while, movement is documented and reported on. Installed correctly, access control leads to a safer environment for people and assets.

What Are Access Control Systems?

Definition

Access control systems allow organisations to regulate access to buildings, rooms or restricted areas. By swapping out traditional keys for electronic credentials, organisations gain the ability to manage and monitor access permissions with precision.

‘Physical access control systems’ refer to systems concerning entry to a restricted area. ‘Electronic access control systems’ (or EACS) is a subcategory of systems with electric locks.

What Is The Purpose Of Access Control Systems?

These systems enforce access regulations. They ensure that only authorised individuals can enter specific zones. Successful or not, all attempts to enter will be electronically stored. This is necessary for compliance in certain industries and aids any investigations.

An access control system safeguards people, property and information by restricting access to a given area only to individuals with a ‘key’. Common access control systems and their keys include:

  • Keycard systems in office buildings, using physical cards.
  • Biometric scanners at gym entrances, using facial identification.
  • PIN pads securing storage areas, where users must have knowledge of the entry code.
  • Mobile credentials for apartment complexes, using a secondary device such as a fob or mobile phone.

Each access control system has different use cases. There is no ‘one size fits all’ solution. Our dedicated access control system installation team here at SMS Security can answer any questions you may have.

Key Components of an Access Control System

Credentials

Credentials are the modern-day keys for access control systems. They take multiple forms, including:

  • Physical cards or fobs, which can be easily carried
  • Mobile phone credentials offering seamless, contactless access
  • Biometric data, such as face or fingerprint scans
  • PINs or passwords, requiring memorisation and careful management

Access Control Readers

Access control readers verify credentials. In simple readers, this means checking that the user-provided PIN is correct. It could also mean comparing a fob’s ID to an internal database. Complex, state-of-the-art scanners may even analyse fingerprints or facial features.

Control Panels

These are the control centres of the system. Control panels process data received from the readers. They work with the reader to communicate with the central management software.

Electronic Locks

Like regular physical locks, electronic locks physically stop people from accessing an area. These unlock only after receiving a valid credential or key from the wider control system.

Digital locks can log entry attempts and automatically relock themselves following entry, eliminating human error. In cases where the electricity supply fails, these locks typically remain closed until power is restored.

Management Software

Management software lets security define who can access a specific area, observe activity and generate reports. Advanced systems offer easy to read interfaces with mobile management options, bringing physical security into the 21st century.

Benefits of Access Control Systems

Modern Security

Access control systems offer layers of protection that are almost impossible otherwise. Lost keys are one of the biggest risks to physical security, threatening illegal access. Electronic access control systems allow the revocation of access without replacing locks outright.

Convenience

Access control systems make access management simple. Staff appreciate needing a single credential. Business owners enjoy the flexibility to update permissions straight away when staff are let go or keys are misplaced.

Scalability

Modern access control systems can grow with an organisation. They easily adapt to incorporate new users, additional entry points and any evolving requirements.

Enhanced Monitoring and Reporting

These systems generate detailed audit trails that log who enters various parts of the premises and when they do so. This data assists in both security investigations and compliance.

What to Consider for Access Control System Installation

Assess Your Needs

First, review what your security requirements are.

Consider:

  • the number of access points you need,
  • how many people will be accessing sensitive areas,
  • security requirements for compliance,
  • the cost of lapses in security, and,
  • your budget.

Choose the Right Type

Select a system with your future needs in mind. If in doubt, consider a 10-15 year timescale. Think about:

  • integration with existing systems,
  • the types of credentials you prefer,
  • scalability for growth, and,
  • whether remote management will be required.

Avoid Common Pitfalls

The two biggest pitfalls we see are poor integration with existing systems or skimping on budget at the expense of essential features. Always balance cost-effectiveness with security and functionality.

By working with an access control systems installer such as SMS, you can rest easy knowing your new system will coexist with your existing measures. Professionals bring expertise to both technical requirements and advanced security protocols.

Maintenance and Updates

Finally, schedule regular maintenance to prevent and diagnose issues early. This includes keeping software updated, conducting hardware inspections, managing access credentials systematically and performing routine system backups.

Who Can Benefit from Access Control Systems?

Small Businesses

For small businesses, access control systems keep inventory safe without disrupting daily tasks. As these businesses expand, they can rely on the system’s ability to scale affordably.

Large Enterprises

Larger enterprises need to secure multiple locations and hundreds (or thousands) of users. Access control offers centralised management and a thorough overview of security across the network. Investing in organisation-wise solutions reduces costs and friction.

Schools and Universities

Educational institutions have a different set of needs. Access control systems protect students and staff and coordinate entry to build a safe learning environment.

Healthcare Facilities

Access control systems are vital in healthcare facilities. These systems regulate staff movement and secure sensitive areas, upholding patient safety and privacy.

Recap

Access control systems offer crucial security features for modern organisations. They blend enhanced protection with convenience and adaptability. Access control is a worthwhile investment for businesses of all sizes.

Don’t compromise on safety. Consult with security professionals to find the right access control system to protect your facility, assets and people.

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