Panasonic MEW01 351 Planning Manual page 153

Panasonic Electric Works Nordic AB
MEW01351 Rev: - Planning Instructions Fire alarm system EBL512 G3, V1.1.x
The following table is a help when calculating the cable length and/or
the number of units. The table is based on the current consumption at
the lowest power supply voltage allowed i.e. 21 V DC by battery
back-up (no mains).
Recommended cable type is LIHCH-TP 2 x 2 x 0.75 mm
Wire resistance for this cable is approx. 25 ohm / 1000 m.
Up to sixteen units can be connected but it is depending on the type of
units and the cable (type and length).
Number Allowed cable resistance (ohm) / length (m)
of units
Units
1735, 1736
8 8 / 160
7 11 / 220
6 17 / 340
5 20 / 400
4 25 / 500
3 34 / 680
2 50 / 1000
1 100 / max. 1200
Explanation: 8 (ohm) ÷ 25 (ohm wire resistance per 1000 m) = 320 m
but the wire goes from the c.i.e. to the last unit and back to the c.i.e.
again, i.e. the cable length = 320 (m) ÷ 2 = 160 m.
NOTE!
The table is based on the recommended cable type. If a cable with
greater area is used the wire resistance (ohm per 1000 m) will be
lower and the possible cable length will be longer.
It is also possible to use an external power supply, e.g. 3366, when a
greater number of units are required or if a longer cable length is
required.
138
Max. six 1826 / 1828 units.
139
Printing will only be performed if and when the door in the ext. FBP is
being opened. If the door is not opened until after all the alarms are reset,
there will be no printing.
151
Units
1728, 1735, 1736, 1728, 1735, 1736,
138 138
1826 , 1828 & 1826, 1828 &
no printers 1835 one
3 / 60
4 / 80
10 / 200
16 / 320
21 / 420
28 / 560
42 / 840
84 / max. 1200
2
.
Units
139
printer 1835
-
-
-
-
4 / 80
10 / 200
16 / 320
18 / 360