Maple Armor FW105 - LDU (LED Display Unit); Figure 9 ISU (Isolator Unit); Figure 10 LDU (LED Display Unit) - Front View

Installation and Operation Manual
13
 ISU contains four independent isolator circuits, the FW105 can contain 2 ISU.
 Isolate the short point on the signaling line circuit
 Circuit topology support: Class B/DCLB.
Isolator Circuit
From SLC
(internal connection)
Figure 9 ISU (Isolator Unit)
LDU (LED Display Unit)
LDU is a local LED Display unit to display local zone events. It’s a build-in unit for FW105.
 30 zones (2 LEDs and 1 key per zone) for alarm and trouble/supervisory events display & control
 2 zones reserved for future use
 Control can be ACKNOWLEDGE (acknowledge events in the zone) or INITIATE ALARM (Initiate alarm in the
zone) optional
 Communication with FACP via CAN bus (individual address)
Alarm LED
Trouble/Supv
LED
Button
30 zones for alarm and trouble/supervisory events display & control
Reserved
for
future use
Figure 10 LDU (LED Display Unit) – Front View
24V input
and CAN bus