ADLCU-2 AlarmLine II - Dual zone digital location control unit

Modes of operation
1. Independent – This is when the unit is used as a two zone system.
When a fault or overheat condition occurs on an LHD zone, the
corresponding fault or alarm output respectively is triggered. The two
zones operate independently and both sets of outputs should be
connected to a fire alarm control panel.

2. Interlock – this mode is for applications which require a fail-safe
guarantee that an alarm is only triggered when an overheat condition
has been detected. This mode may also be known as coincidence
detection. In this case, the same rated temperature LHD cable should
be attached to both zones of the unit. The alarm output is only
activated when both LHD cables trigger an alarm due to an overheat
condition. If one LHD cable zone input registers an alarm but the
second does not, the alarm output will not be activated.
Modbus communication
The unit includes a two wire RS-485 Modbus output which can be
enabled to output the status of each zone of the digital location control
unit, via Modbus RTU/ASCII protocol. In case of an alarm, the location
(in distance along the cable) is also communicated via Modbus.

Interconnecting cable

The unit supports the use of a interconnecting cable (leader cable) in
between the control unit and the linear heat detection cable. The
interconnecting cable is used in applications where the control unit is
not located in the detection zone. The interconnecting cable is then
used to connect the control unit in one location, with the linear heat
detection cable in the protected area.  The interconnecting cable is
available in 100m lengths, under the product code AAI-0100.