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Alarm sounder
Fire Door Interface
This local alarm has a transistor 'open drain' output, (not a dry
contact relay) and will switch 1A at 12V DC for a bell, light etc.
This local output can be turned on or off for each type of alarm
and can be congured to sound continuously or intermittently to
distinguish between different alarm types.
A re alarm system must be used to release all re doors. External
relay contacts are held closed by the re alarm's interface and will be
dropped during an alarm condition. The system is fail safe as the door
will release even if the cable burns through.
This is a ONE door controller using a dry contact relay.
The lock is wired across 12V and COM. A link (0V to NO or NC) is required, depending on lock type (Fail Closed /
Open). Fit the supplied diode across 12V and COM (Silver end to 12V ) to protect the relay contacts.
The dry relay contacts can be used to switch the power from an independent lock power supply. Wire the 0V to
NC or NO and the lock to COM; the +VCC supply is wired directly to the lock.
Lock Wiring - Relay output
Fail open
12V DC power supply
Door lock
Lock power supply
Fail closed
Lock with an independent supply
External Fire Door relay tted
Panic hardware
A break glass should be tted, in conjunction with a fail open release to
ensure a reliable egress method in the event of an emergency. This is
tted on the 12V supply wire to the lock and drops the power ensuring
that the lock opens.
The diagram shows how to include the break glass in the Net2 lock wiring
circuit.
Break Glass tted
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