Aico Ei129 Hard Wired Switched Input Module Alarm Trigger

The Ei129 is a mains powered switched input module with rechargeable lithium cell back-up that triggers the alarms in a system if an external device is activated, such as a sprinkler system. This compact integration module bridges external safety devices and your fire alarm network, ensuring rapid response to critical triggers without manual intervention.

How It Works
When the volt-free contacts connected to the switched input module are closed, all interconnected smoke, heat and CO alarms will sound. When the device triggering the module resets, it will automatically reset and all interconnected alarms will cease sounding. This automatic synchronisation means your alarm system responds instantly to external events—whether from sprinkler flow switches, building management systems, or commercial fire panels—without requiring separate manual activation.

Uninterrupted Protection with Dual Power
The module runs on 230V AC mains power and has built-in tamper proof rechargeable lithium cells that act as a battery back up in the event of mains failure. These rechargeable cells are designed to have a 10-year life and outlast the life of the module itself, whilst providing up to 2 months of operation without mains power. This dual-power design ensures your integrated system remains fully operational even during extended power outages, a critical requirement for high-risk residential properties, HMOs, and commercial buildings.

Flexible Integration and Installation
The Ei129 is designed to be either remotely sited or can be sited under a smoke/heat alarm by removing the cover plate and mounting the alarm base plate onto the unit. It is fitted with a 3-way connector block for ease of wiring. Whether you're integrating a centralised fire system or connecting distributed devices across a property, the module adapts to your installation requirements without complex rewiring.

Broad System Compatibility
Any combination of 3000, 2110e, 160e and 140RC and 260 Series smoke, heat and CO alarms can be interconnected to a maximum of 20 units (the Ei129 counts as one unit). More than one Ei129 can be used on a system if required on the condition that no more than 20 units are used in the system. This scalability lets you expand your integrated alarm network as your property or building requirements grow.

Industry-Recognised Safety Standards
The device is approved to BS EN60065:2002/A1:2006 and is CE marked. Professional electricians and building compliance officers specify the Ei129 for projects requiring rigorous safety certification and long-term reliability. It includes a 5 year guarantee.

Common Applications
The module excels in multi-unit residential properties where triggering smoke/heat/fire alarms to sound when a sprinkler system is activated or when an EN54 fire system in common areas senses fire to trigger all alarms in an apartment and increase the alarm sound level throughout. It's equally effective in commercial buildings integrating building management systems, healthcare facilities connecting emergency protocols, and retrofit projects where hardwired connections simplify coordination between independent safety systems.