The AACULP is a PC programmable, Analogue Linear Heat Detection (LHD) cable control unit. It provides monitoring for any of the AlarmLine II Range of LHD sensor cable, configurations of alarm and pre alarm temperatures as well as enabling simple interface to a main fire alarm or BMS system. 

As well as monitoring the LHD sensor cable for changes in temperature, the control unit also monitors for open and short circuit faults along the cable ensuring notification if the cable becomes damaged. It is fitted with its own internal temperature monitor and should the temperature witin the controller enclousre reach 100°C (212°F), ana alarm will be signalled. Each control unit may have up to 500m (1640ft) of LHD sensor cable connected to it, acting as a single detection zone. When the LHD sensor cable and the control unit are installed in different zones, a suitable interposing cable can be used to make the electrical connections between them. 

The AACULP provides LED indicaions only and requires a PC to configure the control unit. Pre Alarm and Alarm thresholds can be set through simple menu options with no need for any graphs or monograms. Initial set up is done by measuring and entering the calibraion resistance of the sensor cable removing the need to know the sensor cable length. Volt free changeover contacts are provided inside the control unit for Pre Alarm and Alarm signalling to a main fire alarm control panel or BMS system. A failsafe opto isolated phototransistor fault output is also provided. 

No user controls are provided on the control unit. An isolated input is provided enabling remote reset functionality.