Cable Connection; Optical Loop System - Mitsubishi Electric Melsec QJ71LP21 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 for 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 feet)
H type 300 m (984 feet)
500 m (1641 feet)
1000 m (3281 feet)
1000 m (3281 feet)
1000 m (3281 feet)
Must not be used
Must not be used
(b) When connecting an optical fiber cable, check the specifications of the
cable for restrictions on the bending radius.
(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.
Contact Mitsubishi Electric System Service, Inc, for the tool.
(d) When laying the optical fiber cables, do not touch the fiber core of the cable
and module connectors, and avoid dust or particles.
If oil from hands, dust, or particles adhere to the cores, the accumulated
transmission may be lost, resulting in malfunction in the data link.
Do not remove the cover from the module-side connector until the optical
fiber cable is 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 it snaps.
(g) Shut off the external power supply for the system in all phases before
connecting or disconnecting optical fiber cables.
Distance between stations
QJ71LP21-25,
QJ71LP21S-25: 25Mbps
200 m (656 feet)
100 m (328 feet)
200 m (656 feet)
400 m (1312 feet)
1000 m (3281 feet)
1000 m (3281 feet)
Must not be used
Must not be used
MELSEC-Q
QJ71LP21G QJ71LP21GE
Must not be used Must not be used
2000 m (6562 feet) Must not be used
Must not be used 2000 m (6562 feet)
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