The Nittan Loop Driver is a plug-in card for use in the ZXa and ZXe intelligent multi protocol fire alarm control panels. This module allows ZXa/ZXe control panels to support input/output points from Nittan's Sensortec Analogue Series (AS) Addressable devices such as:

- Ion and Photo Smoke Sensors (Ionisation and Optical)
- Heat Sensors
- Input Modules
- Output Modules
- Sounder Control Modules
- Zone Monitor/Control Modules
- Manual Call Points
- Loop Powered Addressable Sounders
 
The plug-in card provides power for and handles communications to the analog addressable devices. The loop controller continuously monitors the analog values of all sensors and displays this value on the panel as a percentage of the alarm threshold value. Both the alarm and pre-alarm threshold levels can be adjusted from the panel if required. Up to 126 devices can be connected to a single loop controller. Each Sensortec Analogue Series device has an 8 bit DIP switch to allow a unique address, in the range 001 to 126 to be selected. The loop controller can support Class-A and Class-B wiring configurations. Short-circuit isolation and double address detection are built into the plug in card. The AUTO-LEARN facility provided in the ZXa and ZXe control panels saves considerable time and effort when installing a new loop or when changing sensor configuration. It allows the system to learn for itself what devices have been installed on the loop.