AJAX MultiTransmitter, Extra Hardwired Zones Up to 18, Black and White

The AJAX MultiTransmitter is a module for extending an AJAX alarm system with hardwired zones. Where a wireless system relies only on radio devices, this unit gives you a way to connect wired detectors, door and window contacts and other conventional inputs, so that existing cabling can be part of a single, unified security setup. The black and white version is the colour option for buyers who want the device to blend in with light or neutral interiors.
Why hardwired zones matter
Many buildings already have cables run to doors, windows, loading bays or perimeter points. Replacing all of that with new wireless sensors can be expensive and disruptive. Adding hardwired zones means the existing wiring can continue to do its job, while the rest of the system is managed through the AJAX hub and its app. This mix of wired and wireless protection is useful in older properties, extensions, shops, offices and other sites where a full rewire is not practical.
Key features and specifications
- Adds extra hardwired zones to an AJAX alarm system
- Supports up to 18 hardwired zones per unit
- Black and white colour finish
- Designed to work alongside AJAX wireless devices such as sensors, keypads and panic buttons
- Part of the AJAX range, managed from the same hub and app
The number of zones gives planners flexibility. A single module can cover a group of rooms or an entire small premises, and the zones can be allocated to match the layout of the building. Check the supplied documentation for the exact wiring method, power requirements and any accessories needed for your installation.
Typical uses
Home owners often use a module like this to bring older wired contacts into a newer alarm system without changing every detector. Small businesses can use it to cover back doors, stock rooms, tills or fire exits that already have cables in place. Property managers may use it across several units, where a common system makes monitoring and reporting simpler. Installers can also use the device to build a mixed system that suits a client who wants to keep some wiring and add new wireless devices where cabling is difficult.
Planning an installation
Before ordering, it is worth making a list of every wired contact and detector you want to connect. Count the number of inputs, note their locations and check the cable routes back to the planned mounting position of the module. This helps you confirm that up to 18 zones will be enough and that the layout is practical. Confirm compatibility with your current AJAX hub and any other AJAX devices in the system, as well as the software version needed for full functionality.
Care and setup
Keep the module in a dry, protected location, away from direct weather and excess heat, and secure the cabling so that it cannot be damaged or disconnected easily. Follow the installation and test procedures in the included guidance, and run a test of every zone after fitting to confirm that each contact is reported correctly. Regular checks of the wiring and connections will help keep the system reliable over time.
The AJAX MultiTransmitter in black and white is a sensible choice for anyone who wants to extend a modern alarm system with the wiring they already have. It brings wired and wireless security together under one system, giving flexibility for homes, offices and commercial premises alike.







