Cable Connections; Optical Loop System - Mitsubishi Electric MELSEC Q Series Reference Manual

4 SETTING AND PROCEDURE BEFORE OPERATION

4.8 Cable Connections

4.8.1 Optical loop system

Type
SI optical fiber cable
(Old type: A-2P-
)
SI optical fiber cable
H-PCF optical fiber cable
Broad-band H-PCF optical fiber cable
QSI optical fiber cable
GI-50/125 optical fiber cable
GI-62.5/125 optical fiber cable
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(1) Precautions when connecting
(a) The type of cables that can be used will vary according to the distance
between stations.
QJ71LP21,
QJ71LP21-25,
QJ71LP21S-25,
QJ72LP25-25 :
10 Mbps
L type 500m
H type 300m
500m
1000m
1000m
1000m
Must not be used
Must not be used
(b) When an optical fiber cable is connected, the following restrictions on the
bending radius should be observed.
For details, check the specifications of the cable to be used.
(c) Maintain the bending radius of the optical fiber cable within the allowable
range using a tool for securing the optical fiber cable bending radius.
This tool may be purchased from Mitsubishi Electric System Service, Inc, or
your nearest dealer. Please inquire for more information.
(d) When laying the optical fiber cables, do not touch the fiber cores of the cable
and module connectors, and do not let dust or particles collect on them.
If oil from hands, dust or particles adhere to the cores, the accumulated
transmission loss may cause malfunctions in the data link.
Also, do not remove the cover from the module-side connector until the
optical fiber cable is ready to be installed.
(e) When connecting or disconnecting an optical fiber cable, hold the connector
part of the cable.
(f) Connect the cable and module connectors securely until you hear a "click"
sound.
(g) Be sure to shut off all phases of the external power supply used in the
system before connecting or disconnecting optical fiber cables.
Interstation distance
QJ71LP21-25,
QJ71LP21S-25, QJ71LP21G
QJ72LP25-25 : QJ72LP25G
25 Mbps
200m
100m
200m
Must not be used
400m
1000m
1000m
Must not be used
Must not be used Must not be used
MELSEC-Q
QJ71LP21GE
QJ72LP25GE
Must not be used
2000m Must not be used
2000m
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