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Wiring precautions
1) Use the optical fiber cable described in the following manual.
（
When our optical fiber cable (QG series) is used, the installation of the protective holder is
recommended.
）
2) There are restrictions on the bending radius of the optical fiber cable.
For details, check the specifications of the cable to be used.
3) When handling an optical fiber cable, do not touch the optical fiber core of the cable-side or module-
side connector, and protect it from dirt or dust.
If oil from your hand, dirt or dust is attached to the core, it can increase transmission loss, arising a
problem in data link.
4) When connecting or disconnecting an optical fiber cable, hold the connector part of the cable.
If hold the cable part, the cable may break.
5) Make a full connection between the cable-side and module-side connectors until a "click" can be
heard.
6) The self-respect or the tension of the cable must not hang directly in the connector.
It may cause transmission loss or break the cable.
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Installation method
・
Installation on DIN rail
It is possible to install this product on DIN rail (35mm).
1) Hang the upper part of DIN rail attachment on DIN rail.
2) Push the lower part of this product until it sounds "click".
･
Removed from DIN rail
1) Pull the body down.(The upper claw has a spring structure)
2) Remove the lower claw from the DIN rail.
・
Installation by screws
The screw installation is possible by installing mounting plates
on the top and bottom of this product.
（
Please remove the DIN rail attachment ,and install the mounting
plates with M3 screws belonging this product.
）
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Calculating the Transmission loss value
Verify that the line loss between stations is within the standard limit value.
Transmission loss value is calculated by the formula shown below.
Transmission loss value[dB] = Fiber optic transmission loss standard value[dB/km] x Fiber optic cable length [km]…(1)
+ Fusion splicing loss value [dB/location] x Number of Fusion splicing [location]…(2)
+ Adapter connection loss value [dB/ location] x number of adapter connections [location]…(3)
(1) Optical fiber cable transmission
loss standard value [dB/km]: According to the optical fiber cable specifications.
(2) Fusion splicing loss value [dB/point]: 0.2 dB or less per point.
(3) Connector adapter connection loss value: According to the optical connector type and manufacturer.
<PASS/FAIL judgment criterion>
Transmission loss value [dB] ≤ 7 [dB]
[Calculation example]
・
SM fiber
・
Cable length: 5 km
・
Fused connection: 2 points
・
Transmission loss value:
0.5 dB/km
・
Termination:
LC connector
・
Adapter connection:
Splice adapter for LC connecter
Transmission loss value[dB] = (0.5[dB/km]×5[km])
＋
(0.2[dB]×2[locations])
＋
(0.5[dB]×1[locations])
(1) Cable transmission loss
(2)Fusion splices loss
(3)Connector adapter
connection loss
=3.4[dB]
DMC-1000SL-DC
LC/LC
Fusion splice
Fusion splice
DMC-1000SL-DC
×
…
Fusion splice
■■…
Adapter connection
Figure 5.1 Installation method
Figure 5.2 Example of Calculating the Transmission loss
[Conditions]
Figure 5.2 Removed method
1)
2)
2)
1)
Click
