85
12.0
Cables
12.1
Maximum Recommended Cable Lengths
There is a physical limit on the length of the cable between 2 transponder units. Table 23 lists
the maximum recommended lengths per segment for various brands of fire alarm cable.
Exceeding these limits per segment can result in signal distortion or signal loss, which can
affect the network as a whole.
When planning an installation or performing an onsite inspection, take the maximum length
per cable segment into account. Refer to Table 23 for recommended lengths per cable
segment. If the cable you are using is not listed in Table 23, refer to section 12.1.1 on page 86
to calculate the maximum recommended length for a cable segment based on brand of cable.
If you are experiencing signal loss or degradation, contact Mircom Technical Support for
assistance:
Toll Free
1-888-647-3665 (North America Only)
Local
905-695-3535
Attention: Do not mix gauges and brands of cables on a network. Use the same
cable gauge and brand throughout the network.
Table 23 Maximum Recommended Cable Lengths
Manufacturer
Model
Type
Recommended
maximum length per
cable segment (point-to-
point)
Metres
Feet
Belden
5320UJ
18 AWG, 2 conductors,
twisted, non-shielded
820
2690
Belden
5320UM
18 AWG, 2 conductors,
twisted, non-shielded
625
2060
Belden
6320UJ
18 AWG, 2 conductors,
twisted, non-shielded
410
1345
Belden
9572
16 AWG, 2 conductors,
twisted, non-shielded
380
1250
Belden
9575
16 AWG, 2 conductors,
twisted, shielded
185
610
Draka Lifeline
FAS-2C/18NS
18 AWG, 2 conductors,
twisted, non-shielded
750
2460
Draka Lifeline
FAS-2C/18OS
18 AWG, 2 conductors,
twisted, shielded
410
1345
!