PFSIFP8
Intelligent Fire Alarm Control Panel
Installation and Operation Manual
Page 17
Fig. 4-6
A 4.7k
Ω
resistor is connected at terminal ALARM ROUTING and FEED BACK as
factory default. Please remove it and keep it well before connection. Connect the loop in
correct polarity and add the resistor to the end of the line.
NOTE: Fire supervisory devices are polarity-sensitive. Note polarity in
connection. The maximum current of the circuit depends on the number of fire
supervisory device. Do not overload.
4.4.3.4 Connection of Class-A Loops
A Class-A loop is shown in Fig. 4-7.
Fig. 4-7
Note: If more than 32 devices are connected to the loop, loop isolators shall be
used and each loop isolator shall not cover more than 32 detectors.
ALARM ROUTING
Diode
End of Line
Resistor 4.7k
Ω
Fire Monitoring
Device
Resistor
1k
Ω
End of Line
Resistor 4.7k
Ω
FEED BACK
Fire Monitoring
Device
Acknowledgement
LOOP1
～
10
(O+, O-)
LOOP1
～
10
(I+, I-)
Addressable
Field Devices
Addressable
Field Devices
Loop
Isolator
Loop
Isolator
Summary of Contents for PFSIFP8
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