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

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION

4.6 Cable Connection

4.6.1 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 in connecting
(a) The types of optical fiber cables that can be used vary depending on the
distance between stations.
QJ71LP21, QJ71LP21-25,
QJ71LP21S-25: 10Mbps
L type 500 m (1641 ft.)
H type 300 m (984 ft.)
500 m (1641 ft.)
1000 m (3281 ft.)
1000 m (3281 ft.)
1000 m (3281 ft.)
Must not be used
Must not be used
(b) When connecting an optical fiber cable, 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.
Distance between stations
QJ71LP21-25,
QJ71LP21S-25: 25Mbps
200 m (656 ft.)
100 m (328 ft.)
200 m (656 ft.)
400 m (1312 ft.)
1000 m (3281 ft.)
1000 m (3281 ft.)
Must not be used
Must not be used
MELSEC-Q
QJ71LP21G QJ71LP21GE
Must not be used Must not be used
2000 m (6562 ft.) Must not be used
Must not be used 2000 m (6562 ft.)
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