5.3.1
Potential-free contacts
NOTICE
Malfunction due to interrupted relay contacts!
When using relay contacts for external controllers, the connections to the relay con-
tacts can be interrupted when removing the system from the protected cabinet. As
a result, there is a danger of unwanted switching states arising from, e.g. safety
functions, which use closed circuits via relay break contacts in normal state.
● Do not interrupt the connections to the relay contacts when removing the
system from the protected cabinet.
Relay 1
Pre-alarm 1 (NO)
A fire detector has released. The relay remains trig-
gered until the upper
[Reset]
button is actuated.
Relay 2
Fire alarm (NO)
The second fire detector has released or a manual
call point was actuated. The relay remains triggered
until the upper
[Reset]
button is actuated.
Relay 3
Extinguish (NO)
The relay is triggered at the same time as the extin-
guishing process is released and remains triggered
until the upper
[Reset]
button is actuated.
Relay 4
Common failure
(NC)
The relay is triggered continuously. The relay is dee-
nergized in the event of a failure.
*)
failsafe
Relays "1" to "3" remain continuously triggered in this case. The maximum switch
voltage of the changeover contacts is 30 V at a maximum switch current of 0.5 A
and pure ohmic load. Inductive or capacitive loads require external protective cir-
cuits and are to be provided by the owner or by the Authorized Distributor,
depending on the contractual basis.
Mounting and installation
Operating Instructions / DET-AC III Slave / 916007 / 05-2016 / en_US
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