Installation
Hardware components
5
24 | 62
Building Technologies
A6V10211094_f_en_--
Fire Safety
2015-12-15
5.3.2 Relay for fault and alarm (RT activation)
Assignment of connection terminals on periphery board (identical for FC722 and
FC724). Permitted cable cross-section: 0.2…1.5 mm
2
.
FC722 and FC724
X7
Designation
Description
6 FAU_NC
Break contact fault (normally closed)
Potential-free
directional contact
Max. 24 V DC/1 A
5 FAU_COM
Center tap fault (common)
4 FAU_NO
Make contact fault (normally open)
3 AL_NC
Break contact alarm (normally closed)
Potential-free
directional contact
Max. DC 24 V / 1 A
2 AL_COM
Center tap alarm (common)
1 AL_NO
Make contact alarm (normally open)
The relays can be used e.g. for non-monitored activation of remote transmission
equipment 'RT' (e.g. phone dialing equipment).
Fault relay (inverse operation)
The fault relay is activated when at least one station fault has been detected. This
relay is activated when the control panel is in idle mode (, NC, inverse operation).
In the event of a fault message, the relay changes the switching condition (to C,
NO). Thanks to inverse operation, a fault message will still be sent in the event of
the station losing all power.
Connection to an external monitoring
input (example)
Connection of external control
voltage e.g. for an acoustic or optical
fault message (example)
Alarm relay
The alarm relay is activated when at least one station alarm message has been
detected.
Example of connection with external signal transmitter, e.g. an optical normal
operation/alarm message display.
Normal operation
Alarm
X7
NO
NO
+
+ Ub (DC)
NO
+ Ub (DC)