Connection Of Monitored Acoustic Signal Transmitters - Siemens FC72x Quick Reference Manual

5.3.4 Connection of monitored acoustic signal transmitters

X6
X6
X5
X5
Building Technologies
Fire Safety
Assignment of connection terminals on periphery board (2-loop) of FC722 and/or
periphery board (4-loop) of FC724.
Permitted cable cross-section: 0.2...1.5 mm
Designation Description
6 FAU_OUT Output fault
5 VSYS_O Supply output for consumer fault
4 AL_OUT- Alarm output (-)
3 AL_OUT+ Alarm output (+)
2 SOUND1- Output for acoustic signal transmitter (-)
1 SOUND1+ Output for acoustic signal transmitter (+)
Designation Description
4 SOUND2- Output for acoustic signal transmitter 2 (-)
3 SOUND2+ Output for acoustic signal transmitter 2 (+)
2 SOUND1- Output for acoustic signal transmitter 1 (-)
1 SOUND1+ Output for acoustic signal transmitter 1 (+)
Diagram showing principle
In normal operation, the connection is monitored for wire breaks and short-circuits
on the connection line. A monitoring current flows through the termination resistor
R (2.3 kOhm to 5.5 kOhm). All resistance values outside this range are recognized
as faults. The termination resistor should be connected directly to the connection
terminals of the monitored signal transmitter.
In the event of an alarm (with output activated), the polarity on the connection
terminal is reversed and the blocking diode is switched in the conducting direction.
The external signal transmitter is activated with the output voltage (DC +24 V).
+
Fx ⇒ SMD fuse 1 A/T (on the periphery board)
R ⇒ termination resistor (coverage area 2.3 kOhm – 5.5 kOhm)
V ⇒ blocking diode type 1N 4xxxx
M ⇒ flow of current in normal operation (monitoring)
A ⇒ flow of current during an alarm
Note the station's total current (e.g. for the 70 W power unit, max. 2.5 A).
.
2
FC722
FC724
M
Installation
Hardware components
Potential-free
directional contact
Max. DC 24 V / 1 A
Monitored/switchin
g positively
Max. DC 24 V / 1 A
Monitored/switchin
g positively
Max. DC 24 V / 1 A
+
+
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2015-12-15
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