Panasonic Electric Works Nordic AB
MEW01351
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
147
Maximum cable length
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
0
40
80
120
160
200
240
280
320
Total COM loop unit current consumption
Cab
le
l
e
n
g
th
Meter
mA
Figure 31. Graphs showing the cable length in relation to the COM loop units' total
current consumption.
NOTE!
The graphs start at "0 mA" and 863 m cable length
respectively but graph 1 ends at "320 mA" and graph 2 ends at "350 mA". End of
graph = max. allowed loop current. (863 m cable length = 42.3 ohm.)
NOTE!
The graphs are valid for the cable type ELQYB 2 x 1 mm
(0.75mm
2
) with the conductor resistance 24.5 ohm / km. The total
conductor resistance (ohm) = L conductor (ohm) + C conductor
(ohm).
2 x 1 mm (0.75 mm
2
)
24.5 ohm / km