SMS SenTRI2, Руководство по установке, Страница: 10 / 44

10
Network cables
The cables marked * utilise
laminated aluminium tape with a
tinned drain wire for electrostatic
screening. Under certain
environmental conditions galvanic
action may take place between
the aluminium and the drain wire.
This will severely degrade EMC
performance as the foil to drain wire
impedance will increase. Armoured
variants of these can also be used
for wiring a loop circuit.
Network cables
Enhanced Network cables
Approved cables for network wiring
(EMC Compliant)
†
Draka Firetuf FT120 Enhanced
FTPLUS3EH1.5
(Previously Firetuf FT Plus)
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y
3 Cores, each having 1.5mm
2
cross
section area
7
Fireshield Enhanced FSN G2000
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y
3 Cores (1 pair + 1) and earth
y
each core having 1mm
2
cross
section area
†
Mineral insulated copper cable
800m maximum Panel to Panel or
Panel to Network node cable distance.
y
BS6207: Part 1
y
3 parallel cores
y
having continuous metal sheath
encapsulating
y
each core having 1.5mm
2
cross
section area
y
a red cover sheath (preferred for
alarm applications)
†
Prysmian (formally Pirelli) FP Plus *
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y
3 Cores each having 1.5mm
2
cross
section area
Standard Network cables
Approved cables for network wiring
(EMC Compliant)
†
Belden Armoured equivalent
This cable being a two pair cable
to BS5308:Part 1 (type 2) 0.5mm
2
(16/0.2mm).
600m maximum Panel to Panel or
Panel to Network node cable distance.
†
Belden No 9729 (UL Style 2493)
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y
2 twisted pairs
y
Each pair individually screened
24AWG (7 strands x 32 AWG)
y
Capacitance between conductors
39.4pF/m at 1kHz
y
Capacitance conductor to screen
72.2pF/m at 1kHz
y
Temperature range -30
o
C to +60
o
C
†
Belden No. 9842 EIA RS485
Applications, O/A Beldfoil® Braid
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
Must have following characteristics:
y
2 twisted pairs
y
24AWG (7 strands x 32 AWG)
conductors
y
Characteristic impedance -
120ohms
y
Capacitance between conductors -
42pF/m at 1kHz
y
Capacitance conductor to screen -
75.5pF/m at 1kHz
Standard network cables continued
on the next page..