Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 129

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
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(c) When connecting a coaxial cable, the following restrictions on the bending
radius must be observed.
Allowable bending radius
Cable type
3C – 2V 23 mm (0.91 inches)
5C – 2V 30 mm (1.18 inches)
5C – FB 30 mm (1.18 inches)
(d) Do not pull connected coaxial cables.
Doing so may cause poor contact, cable disconnection, and damage to the
module.
(e) Connect a terminating resistor to both terminal stations in the coaxial bus
type network system.
(f) Depending on a operating environment, some white oxidation deposits may
be seen on the F type connector. Note that oxidation will not occur on the
connection area, so there will be no problems with the function of the unit.
(g) Shut off the external power supply for the system in all phases before
connecting or disconnecting coaxial cables.
Connector
r A
55 mm
(2.17 inches)
MELSEC-Q
A
r
Front of module
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