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Connecting a BSR-8020/WP/MAR to conventional detectors. A 4.7kΩ resistor must be
installed on the last detector. The maximum number of detectors per device is
40
conventional detectors of olympia electronics. According to EN 54 the maximum
number of detectors per zone is 32 devices. The maximum consumption of the
detectors in idle state, must not exceed the 2.5mA.
The power is supplied by an external power supply and thus does burden the loop. The
power consumption is that of an input/output unit. The external power supply must have
an output range 21-28V and must not be interrupted during a power failure.
Additionally, the external power supply must be isolated from the main power grid and its
power must be calculated depending on the maximum load. If for example we have 10
such devices and each device consumes 30mA during an alarm then the power supply
must be capable of providing at least 300mA.
Loop
Loop
4.7kΩ
+
R
BS-572
-R
O
U
T
-
-
N
L
I
+
UT
R
O
+
L
IN
-R
O
U
T
-
-
N
L
I
+
UT
R
O
+
L
IN
-R
O
U
T
-
-
N
L
I
+
UT
R
O
+
L
IN
-R
O
U
T
-
-
N
L
I
+
UT
R
O
+
L
IN
-R
O
U
T
-
-
N
L
I
+
UT
R
O
+
L
IN
921802003_09_005
Conventional detector driving unit with external power supply
External
power
24V
+24V
IN
NO
+IN
C
-IN
NC
ON
OFF
+L
+L
+L
-L
PE
PE
+L
+L
+L
-L
Operation
Dip-switch setting
1
ON
2 3 4 5 6 7 8 9 10
1
ON
2 3 4 5 6 7 8 9 10
During an alarm, it
interrupts
the power to the zone to
reduce the consumption
During an alarm, the
power of the zone remains
in order to indicate which
detector issued the alarm.
