Installation and Operation Manual
12
3) Relay Outputs
MFU contains four programmable dry contact relays. The default setting is as follows:
o Relay 1 - Alarm Relay
o Relay 2 - Supervisory Relay
o Relay 3 - Trouble Relay
o Relay 4 - Monitor Relay
The relay contacts are Form C style.
4) Network Circuit – Class B/DCLB
MFU contains one Class B network circuit
TheFW105 control panel communicates to panels/annunciators, up to 110 nodes on a network in Class
B/DCLB.
Circuit topology support: Class B/DCLB.
5) Network Circuit – Class X/DCLC
MFU contains one Class X network circuit
The FW105 control panel communicates to panels, up to 32 nodes on a network in Class X.
Circuit topology support: Class X/DCLC.
NOU (Notification Output Unit)
NOU is a Notification Output Unit includes 4 NACs. It is an optional unit for FW105.
NOU contains four independent notification appliance circuits.
Circuit topology support: Class A or Class B.
Maximum current: 2A per NAC, 10A maximum for all NACs (4 NACs on MFU + 4 NACs on NOU)
24V input
and CAN bus
NACs
Figure 8 NOU (Notification Output Unit)
ISU (Isolator Unit)
ISU is an SLC Isolator Unit, that includes 4 isolator circuits. It’s an optional unit for FW105.