I/O Link Extender Cable Selection - Honeywell Series 8 I/O User Manual

Available Optical Power
Where for a Standard I/O Link Extender:
Transmit Power = - 16.0 dB
Minimum Receiver Sensitivity = - 24.0 dB
Power Loss Over Time = 2.5 dB
Example calculation for a Standard I/O Link Extender using 62.5 micron cable:
(- 16.0 dB) - (- 24.0 dB) - (2.5 dB) = 5.5 dB Available Optical Power
ATTENTION
As the maximum transmitter output level is -7 dB, and the maximum receiver
input level is -10 dB, the receiver may be overdriven on a short link and may
require a 3 dB attenuator. Connector allowances for the transmitter and
receiver are included in the above power declaration.
Losses in splices
The table below is used for the following Losses in Splices calculation.
Losses in Splices = Number of Splices x Maximum Loss per Splice
Standard Extender I/O
Fusion
Mechanical
ST-connector
Examples: Max. span calculation for cables with fusion or mechanical splices:
Two fusion splices
Two mechanical
splices:

I/O link extender cable selection

Honeywell ST-type connector cable assemblies
Honeywell can provide short fiber optic ST-type connector cable assemblies. You can
order by part number and cable length.
R500
April 2017
9. Series 8 I/O Link Fiber Optic Extenders (FOE)
cable type
0.2
0.3
0.5
Variable values: Available optical power = 5.5 dB, two splices.
(5.5 dB) - (2 splices x 0.3 dB max loss per splice) / (4 dB/Km) = 1.22 Km
(5.5 dB) - (2 splices x 0.5 dB max loss per splice) / (4 dB/Km) = 1.12 Km
Series 8 I/O User's Guide
Honeywell
9.4. Defining the Fiber Optic topology
Average Loss
per type (dB)
Maximum loss
per type (dB)
0.3
0.5
0.9
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