Page 6 of 17 Revision 1.1 Aug 2020
Document No. AlarmLine II Digital EN Controller Installation Instructions
Overview
The AlarmLine II Digital EN Controller allows accurate location of an alarm point along a length of Kidde AlarmLine II Digital EN Linear Heat Detection
(LHD) cable. It continuously monitors up to two zones of Digital LHD cable for a fault (open circuit) or an alarm (overheat or fi re condition). Because of the
wide range of applications that Digital LHD cable can be used for, it may not always be possible, or be too time consuming, to locate where along the cable
an alarm has occurred. Using the AlarmLine II Digital EN Controller, when an alarm occurs the distance to the overheat condition is immediately calculated
and displayed on the integrated display.
If a fault is detected, the corresponding fault output stops conducting, triggering a fault at the fi re alarm control panel. If an alarm is detected, the
corresponding alarm output changes state, triggering an alarm at the fi re alarm panel. The fault outputs also stop conducting on power loss to the unit or
microprocessor fault, triggering a fault at the fi re alarm control panel.
The two wire RS-485 Modbus RTU/ASCII output also outputs the current state of both zones. See the section “Modbus RTU/ASCII Communications” for
more detail.
There are two primary confi gurations of the AlarmLine II Digital EN Controller (see fi gure 1):
1) The Digital LHD cable can be connected directly to the AlarmLine II Digital EN Controller
2) The Digital LHD cable is connected to a length of leader cable which is connected to the AlarmLine II Digital EN Controller. In this scenario the
leader cable must be “calibrated out” during commissioning of the AlarmLine II Digital EN Controller.
Connections Diagram
Figure 3 shows the connections diagram for the AlarmLine II Digital EN Controller. The unit is provided with a 3.6kohm end of line resistor in each zone
input. If only one zone is required, leave the 3.6kohm resistor connected across the zone which is not in use. Otherwise the 3.6kohm resistor should be
connected at the end of the Digital Linear Heat Detection cable.
Figure 3: Wiring Diagram for the Kidde AlarmLine II Digital EN Controller
Installation
