Overview
The AACULP is a PC programmable, Analogue Linear Heat
Detection (LHD) cable control unit. It provides monitoring for any of
the AA range of LHD sensor cable, configuration of alarm and prealarm temperatures as well as enabling simple interface to a main
fire alarm or BMS system.
Interface and Programming
The AACULP provides LED indications 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 nomograms. Initial set-up
is done by measuring and entering the calibration 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 signaling to a main fire alarm control
panel or BMS system. A failsafe opt-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.
Operation
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 within the controller enclosure
reach 1000
C, an alarm will be signalled.
Each control unit may have up to 500, of LHD sensor cable
connected to it, acting as single detection zone. When the LHD
sensor cable and the control unit are installed in different areas,
a suitable interposing cable can be used to make the electrical
connection between them.
Ordering information
