Your Trusted Alarm Accessories Supplier in South Africa - Communica

Find All Your Alarm Accessories at Communica

A reliable alarm system requires more than just a control panel - from motion detectors to backup batteries, sirens, tamper switches, and robust cabling, each accessory plays a critical role in security. As one of South Africa's largest independent suppliers, Communica offers an extensive selection of alarm accessories and system add-ons for residential, commercial, and institutional needs. Whether you're a security integrator, a technician, or a facilities manager seeking trusted sourcing for expansion or maintenance, our range caters to every project requirement.

Alarm Accessories We Stock

• Passive infrared (PIR) and dual-technology motion sensors
• Magnetic door/window contacts
• Piezo and speaker-type sirens
• Power supplies and 12V backup batteries
• Alarm cables, junction boxes, and mounting hardware
• Tamper switches, panic buttons, and keypads
• Wireless alarm accessories and remote controls

Our inventory is chosen to meet the most common installation requirements in South Africa, supporting alarm panel brands such as DSC, Paradox, Texecom, and more. This ensures compatibility and easy sourcing for upgrades or repairs.

Benefits of Sourcing from a Local Supplier

• Immediate stock availability for urgent projects
• Short lead times for both common and niche accessories
• Branch collection in Gauteng and Western Cape
• VAT invoices and account facilities for businesses and institutions
• Guidance on specification matching, brand alternatives, and SA-compliant wiring practices

Alarm Accessory Compatibility & Specifications

It's important to select accessories that match your alarm system's voltage and connector standards. For example, most detectors and sirens operate on 12V DC, while batteries should be sized according to your control panel's requirements. Popular models stocked include:

Always check panel manuals or original specifications. If you need help cross-checking, our technical team is available in-store, by phone, or email for assistance tailored to the South African market.

Specification Selection and Installation Tips

Choosing the right accessory goes beyond voltage: consider factors like environmental rating (for outdoor detectors), tamper-proof features, wiring gauge for cable runs, and mounting hardware compatibility. When replacing batteries, always note the amp-hour (Ah) value - in South Africa, the common size for alarm panels is 12V 7Ah, but check your system label.

Practical Example

Suppose you're updating an office panel with three new motion sensors and an indoor siren. Each sensor draws 16mA, and the siren draws 200mA when active. To size the cable:

• Total Current = (3 x 16mA) + 200mA = 248mA
• For a run of 30 meters, use at least 0.5mm2 alarm cable to avoid excessive voltage drop

Calculating required backup time for a 12V 7Ah battery: For a typical alarm panel consuming 250mA:

• Runtime (hours) = Battery Capacity (Ah) / Panel Current (A)
• Runtime = 7Ah / 0.25A = 28 hours (theoretical, real-world is less due to inefficiency and aging)

Popular Alarm Accessory Brands at Communica

• Paradox - sensors, sirens, wireless remotes
• Nemtek - robust motion detectors and contacts
• Vision, Recharge - sealed lead-acid backup batteries
• Securi-Prod, Cabstrut - alarm cabling & connectors

Browse these and many other recognised brands on the Shop by Brand page or filter by alarm accessory type on our Collections menu for quick selection.

Lead Times, Account Facilities & Branch Collection

• Most commonly used alarm accessories are stocked for same-day dispatch or collection
• Bulk orders, institutional quotations, and VAT invoices for business clients
• Order online and collect from Samrand, Pretoria CBD, or Cape Town branches

Sources

• Communica - Security, Access Control & Surveillance Category
• Communica Branches & Trading Hours
• Security Distributors SA - Alarm Accessories Guide
• Paradox Security Products - Official
• Nemtek - Alarm System Accessories