Page 13 of 17 Revision 1.1 Aug 2020
Document No. AlarmLine II Digital EN Controller Installation Instructions
Zone 1: OK
Zone 2: I/F FAULT
Zone 1: FAULT
Zone 2: OK
{Zone 1: 300M
{Zone 2: OK
{Zone 1: 300M
{Zone 2: 301M
Fault/Alarm Conditions
LED Illustration
21. If an alarm condition occurs the AlarmLine II Digital EN Controller
automatically calculates the distance along the cable to the trigger point
and first displays this value in metres.
22. The display alternates showing the distance along the cable to the
trigger point in metres and in feet.
23. The unit monitors for relay faults. If an alarm condition occurs but the
relay does not switch state (due to a coil failure for example) the device
will go into relay fault and show the screen to the right, depending upon
which zone is in fault
24. The unit monitors for interference faults when the input may be
changing between alarm, ok and fault conditions, for example, too rapidly.
In this case an I/F fault is displayed on the corresponding zone. Check all
cable teminations are securely fastened and for other sources of noise.
25. The unit monitors for cable faults (i.e. an open circuit). An open circuit
will be displayed as fault (as per zone 1 shown right).
26. In interlock mode, the alarm outputs are only activated when both
LHD cables are triggered. If one cable triggers but not the other the
display will show the distance to the alarm on the triggered zone and the
corresponding alarm LED will flash slowly.
27. In interlock mode, if both cables go into an alarm, the alarm outputs
will be activated and the display will show the distance to the alarm for
each zone. The zone 1 and zone 2 alarm LEDs will light continuously.
Zone 1: RLY FLT
Zone 2: OK
Zone 1: 1751 ft
Zone 2: OK
Zone 1: 534 m
Zone 2: OK
