User guide

System Hardware
4.5 PowerLoop 4-20 mA Input Unit BN-342/EX
4.5.1 Description
The PowerLoop 4-20mA Input Unit BN-342/EX is a general purpose
PowerLoop interface designed for third party detectors connected to
the AutroSafe Interactive Fire Alarm System.
The PowerLoop is a two-wire bus capable of delivering 30VDC/100W
connected in ring topology and is galvanically isolated from the rest of
the system.
The unit communicates with AutroSafe using the PowerLoop protocol
from BSD-340 Loop Driver.
The unit has a 24VDC/9,5W output providing power to the connected
detectors, plus a 4-20mA input galvanically isolated from the
PowerLoop.
4.5.2 Versions
• BN-342/EX*: EEx me version including 9,5W DC/DC for external
detector power supply
• BN-342/1: 19” 3U rack version, bare PCB with 19” rack front
panel, no DC output
• BN-342/2*: DIN rail version, bare PCB in a open DIN rail box, no
DC output
4.5.3 Overview
Power
Fire Brigade Msg
Fire Vent Activated
Fire Ext Activated
0
System Description, AutroSafe Integrated Fire & Gas Detection System, 116-P-ASAFE-IFG/XE Rev. B, 2005-10-27,
Autronica Fire and Security AS
Page 24
ALARM
?
C
98
7
6
54
3
2
1
Silence Buzzer
Silence S ounders
Reset
More Alarms
Prewarning
Early Warning
System Fault
Function Disab led
Test
Fault
Self Verify
General Alarm
AutroCom
EAU-321
EAU-341
AUTROFIELDBUS
BS-320
BSD-340
BSD-340
BSD-340
Flame
Detector
PowerLoop
Gas
Detector
BN-342/Ex
4-20mA
Power
Fire Brigade Msg
Fire Vent Activated
Fire Ext Activated
0
ALARM
AutroCom
?
C
98
7
6
54
3
2
1
Silence Buzzer
Silence S ounders
Reset
More Alarms
Prewarning
Early Warning
System Fault
Function Disab led
Test
Fault
Self Verify
General Alarm
EAU-321
EAU-341
AUTROFIELDBUS
BS-320
BSD-340
BSD-340
BSD-340
Flame
Detector
PowerLoop
Gas
Detector
BN-342/Ex
4-20mA