Yaskawa G7 Drive - Manual (Page 71)

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‹ Wiring Terminal Blocks
Use no more than 100 meters (328 ft) of wiring for PG (encoder) signal lines, and keep them separate from
power lines.
Use shielded, twisted-pair wires for pulse inputs and pulse output monitor wires, and connect the shield to the
shield connection terminal.
„ Wire Sizes (Same for All Models)
Terminal wire sizes are shown in Table 2.19.
„ Straight Solderless Terminals for Control Circuit Terminals
We recommend using straight solderless terminals on signal lines to simplify wiring and improve reliability.
„ Closed-loop Connector Sizes and Tightening Torque
The closed-loop connectors and tightening torques for various wire sizes are shown in Table 2.20.
„ Wiring Method and Precautions
Observe the following precautions when wiring.
• Separate the control signal lines for the PG Speed Control Card from main circuit lines and power lines.
• Connect the shield when connecting to a PG. The shield must be connected to prevent operational errors
caused by noise. Also, do not use any lines that are more than 100 m (328 ft) long. Refer to Fig 2.17 for
details on connecting the shield.
• Connect the shield to the shield terminal (E).
• Do not solder the ends of wires. Doing so may cause contact faults.
• When not using straight solderless terminals, strip the wires to a length of approximately 5.5 mm (0.2 in).
Table 2.19 Wire Sizes
Terminal
Terminal
Screws
Wire Thickness (mm 2 ) Wire Type
Pulse generator power supply
Pulse input terminal
Pulse monitor output terminal
-
Stranded wire: 0.5 to 1.25
Single wire: 0.5 to 1.25
• Shielded, twisted-pair wire
• Shielded, polyethylene-covered, vinyl
sheath cable
Shield connection terminal M3.5 0.5 to 2
Table 2.20 Closed-loop Connectors and Tightening Torques
Wire Thickness [mm 2 ]
Terminal
Screws
Crimp Terminal Size Tightening Torque (N • m)
0.5
M3.5
1.25 - 3.5
0.8
0.75 1.25 - 3.5
1.25 1.25 - 3.5
2 2 - 3.5