2-Door Interlocking Units for Sale in South Africa - Local Stockist at Communica

Secure Controlled Entry - 2-Door Interlocking Units at Communica

Two-door interlocking units are essential access control devices for ensuring only one secure entrance or exit is open at any time - a common requirement in security lobbies, cleanrooms, banks, and sensitive industrial environments. These units allow for managed personnel flow, reducing the risk of tailgating, unauthorized access, or contamination events.

How 2-Door Interlocking Works

With a two-door interlocking unit, opening one door automatically locks the other until the initial door is closed and secured, enforcing a sequence and creating an effective security 'airlock'. These systems interface with magnetic locks (maglocks), electric strikes, push-to-exit buttons, and access control systems.

• Prevents both doors from being unlocked at the same time
• Compatible with popular access control brands and hardware
• Enables compliance with many security protocols

Applications & Use Cases

South African integrators, facility managers, and installers commonly use 2-door interlocks for:

• Industrial safety zones (chemical plants, workshops)
• Banking and vault access lobbies
• Pharmaceutical cleanrooms or labs
• Server/data centre access

Key Specifications to Consider

For demanding or larger installations, modular interlocking units supporting 3+ doors are available. For standard office or lab entrances, the 2-door controller remains the most practical and widely supported option.

Comparing Models in Stock

Communica's range includes popular 2-door interlocking units from established international and local brands. Product filtering is available online to select by relay rating, voltage range, enclosure style, and supported accessories (timers, indication outputs).

Installation & Compatibility

2-door interlocking units are designed for compatibility with electro-mechanical locks, maglocks, and request-to-exit buttons commonly stocked by Communica. Wiring is straightforward: most units offer labelled terminals for Door 1 and Door 2 contacts, power, and accessory switching. Always reference the wiring diagram provided with your product.

+12VDC ----[Unit Power]
D1_COM  --------------------[ Door 1 Magnetic Lock ]--- GND
D2_COM  --------------------[ Door 2 Magnetic Lock ]--- GND
INPUT1 (Exit) -------[ Push Button Door 1 ]
INPUT2 (Exit) -------[ Push Button Door 2 ]

Local Supply, Support & Lead Times

Communica holds a variety of interlocking units and compatible access control hardware at the Samrand (Centurion) distribution warehouse. Standard units are often available ex-stock for immediate branch collection or courier dispatch across South Africa. For project and bulk procurement, quotations with VAT invoices can be supplied for business and institutional buyers. Check the Branches & Trading Hours for up-to-date collection times or to confirm availability at your preferred location.

• Shop top brands and compare relay specs to match your door lock current
• Combine with power supplies, exit buttons, maglocks, and cable for a complete system
• Request a formal quote for educational or industrial supply requirements

Sources

• Communica Security & Access Control Category
• Communica Branches & Trading Hours
• ASSA ABLOY - Interlocking Units Overview
• Tormax Interlock Control Systems