Panasonic Electric Works Nordic AB
MEW01351
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
143
22
Cable types
A fire alarm installation is a safety installation and it is important that
the cables used are of correct types and according to national
regulations, e.g. regarding cable colour, method of mounting, etc. Fire
alarm cables should, when possible, be installed as far away from
other cables as possible, in order to avoid disturbances from these.
The maximum cable length is depending on the cable type (area,
twisted / not twisted pairs, screen / no screen), the units' current
consumption, etc.
22.1
TLON Network cables
A shielded Belden cable with twisted pair should be used, e.g. JY (St)
Y 2 x 2 x 0.8 or 7703 NH 1 pair 22 AWG.
125
See also separate TLON Technical description.
22.2
COM loop cables
Loop topology is used for highest safety, i.e. the cable, connected in
the control unit, returns back to the control unit. In case of a break on
the loop, communication in two directions starts.
See dwg. 512 G3 – 25, – 31 and – 41.
Cable length is depending on the type and number of loop units, etc.
See chapter "COM loop cable length", page 145 and dwg. 512 G3 -
41.
ELQYB 2 x 1 mm (0.75 mm
2
) or equivalent (twisted pair).
ELQYB 10 x 2 x 1 mm or equivalent, when feeder line is required.
If screened cable is used, the screen shall be connected close to each
loop unit and only incoming (or outgoing) screen to the c.i.e. earth
point.
22.3
Ext. FBP / Display Units cables
RS485. Max. cable length < 1200 m to the furthest away D.U.
Cable type LIHCH-TP 2 x 2 x0.75 mm
2
or equivalent (twisted pair).
22.4
Conventional zone line cables
Inputs to 8 zones expansion board 4580 and Multipurpose I/O unit
3361. See dwg. 512 G3 - 33 and - 36.
ELQRB 2 x 0.6 mm (0.3 mm
2
) or equivalent. Max. 50 ohm cable
resistance (= 400 m cable length).
125
For longest possible cable length Echelon recommends an unshielded
cable type but the EBL512 G3 VdS approval require shielded cable.
