ID
2
net Installation & Commissioning Manual
7 997-448-000-2, Issue 2
July 2004
Installation
d. Use screened cables to comply with the
EMC requirements and reduce the
possibility of external interference.
The following table lists cables tested and
maximum distances achieved:
Each link in a network may be either copper-
conductor cable or optical fibre.
Caution: To ensure specified performance
use only 2-core, screened cables.
On no account must multi-core
cables be used.
3.3.1 Fibre-optic Cable Limits
The fibre-optic link used by the ID
2
net network
has the following specification:
a. Connector style ST
b. Link Duplex (Twin Fibre)
c. Wavelength 820nm
d. Fibre Type Multi-mode
Parameter Min. (dB) Typical (dB)
Optical Power Budget
50/125µm Fibre 4.2 9.6
Optical Power Budget
62.5/125µm Fibre 8.0 15
Notes:
1 For a typical 62.5/125 cable, attenuation is
2.8dB/km which gives a typical link length
of 15/2.8 = 5300m.
2 Using worst-case figures, attenuation of
4.5dB/km gives a link length of:
8/4.5 = 1800m.
3 For a specific design, substitute the
attenuation figure for the fibre to be used
into the calculation.
4 Allowance should be made for any
additional splices or connectors used.
Cable Type Recommended Max. Test
Operating Distance (m) Distance (m)
Pirelli FP200 Flex 1.5mm
2
850 1000
Draka Firetuf FDZ2ER (1.5mm
2
/2.5mm
2
) 1200 1400
AEI MICC 2L1.5 (1.5mm
2
) 1200 1400
AEI Firetec F2CxxE (1.0mm
2
/1.5mm
2
) 1350 1600
Pirelli FP200 Gold 1.5mm
2
1700 2000
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