Wiring; Wiring Procedure; Cable - Mitsubishi MELSEC iQ-F FX5 User Manual

3.5

Wiring

This section explains about the wiring.

Wiring procedure

1.
Preparing for wiring
Prepare cables required for wiring. (Page 54 Cable)
2.
Turn OFF the PLC power
Before wiring, make sure that the PLC power is OFF.
3.
Wire the communication equipment
Connect the RS-485 communication equipment. (Page 56 Connection diagram)

Cable

Select cables using the procedure described below.
Twisted pair cable
Use shielded twisted pair cables for connecting RS-485 communication equipment.
The specifications of the cables used in wiring are shown.
■RS-485 cable specifications
Items
Cable type
Number of pairs
Conductor resistance (20)
Insulation resistance
Voltage resistance
Electrostatic capacitance (1 kHz)
Characteristic impedance (100 kHz)
■Cable structural drawing (reference)
Example of two-pair cable structural drawing
3 PARALLEL LINK FUNCTION
54
3.5 Wiring
Pair
Shield
Descriptions
Shielded cable
2p, 3p
88.0 Ω/km or less
10000 MΩ-km or more
500 V DC, 1 minute
60 nF/km or less as an average
110±10Ω
Example of three-pair cable structural drawing