7SR18 Performance Specification
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Type Value
Optical Fibre Data Interface:
Maximum Distance Single-Mode Up to 40 km
1)
Maximum Distance Multi-Mode Up to 6 km
1)
Protocol Full Duplex
Connector Type Duplex LC, Small Form-Factor Pluggable Device
Transmission Level
max -0 dBm
ave
min -5 dBm
ave
Receiver Sensitivity -34 dBm
ave
Optical Wavelength 1300 nm
Optical Budget 16 dB
Laser Class 1 according to EN
60825-1/-2
Using single-mode fibre 9 µm / 125 µm
Range
Assume a path attenuation of 0.5 dB / km (0.8 dB / mile) for single-mode and
multi-mode fibre. For multi-mode fibre you must additionally take the product
of the bandwidth lengths into consideration.
1)
Based on fibre attenuations: -
Assumes no joins in the fibre, but includes a 3 dB safety margin.
Actual losses for specific application should be calculated using cable manufacturers data or by direct measurement using
specialised equipment.
Maximum Distance (km): -
(
)
=
(
)
−
(
)
−
Where: -
=
(
)
+
(
)
+
Application Note:
Maximum distances are dependent upon good connections / lowest signal losses.
If devices with protection data interface communication are used for the communication over distances shorter than
specified, the transmitting power may have to be reduced via optical attenuators.
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