Cable Connections; Optical Loop System - Mitsubishi QJ71LP21 Reference Manual

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION

4.8 Cable Connections

4.8.1 Optical loop system

Type
SI fiber-optic cable
(Old type: A-2P- )
SI fiber-optic cable
H-PCF fiber-optic cable
Broad-band H-PCF fiber-optic cable
QSI fiber-optic cable
GI-50/125 fiber-optic cable
GI-62.5/125 fiber-optic 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 500
H type 300
500
1000
1000
1000
Must not be used
Must not be used
(b) When optical fiber cable is connected, there are restrictions for the bending
radius of the cable.
Check the cable used for specific details.
(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.
(e) When attaching or detaching the optical fiber cable to/from the module, pull
or insert the cable by holding the cable connector securely with your hand.
(f) Connect the cable and module connectors securely until you hear a "click"
sound.
Interstation distance (m)
QJ71LP21-25,
QJ71LP21S-25,
QJ71LP21G
QJ72LP25-25 : QJ72LP25G
25 Mbps
200
100
200
Must not be used
400
1000
1000
Must not be used
Must not be used Must not be used
MELSEC-Q
QJ71LP21GE
QJ72LP25GE
Must not be used
2000 Must not be used
2000
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