The Thorn Security 125-065-787 is an Expansion Input/Output (I/O) Module, also identified in available listings as an XIMO expansion I/P-O/P module. It is designed to expand the input and output capabilities of compatible Thorn/Tyco fire alarm control systems. The module provides an interface for connecting additional field inputs and outputs to the fire alarm system, supporting system monitoring and control functions. It is commonly encountered as a legacy marine and fire-alarm spare part for maintenance, replacement, and system restoration.
Features
- Expansion Input/Output (I/O) module
- Designed for Thorn/Tyco fire alarm systems
- Provides additional system input/output capability
- Supports interface between field devices and the fire alarm controller
- Suitable for system expansion and configuration
- Compact PCB-based construction
- Suitable for maintenance and replacement of legacy systems
- Available as a new, surplus, or refurbished spare depending on supplier
Typical Applications
- Marine fire detection and alarm systems
- Shipboard fire alarm control systems
- Offshore fire and safety systems
- Expansion of existing Thorn/Tyco installations
- Fire alarm input/output interfacing
- Replacement of obsolete or failed I/O modules
- Maintenance and retrofit projects





