Installing and Wiring Option Boards2- 39 Wiring Terminal BlocksUse no more than 100 meters of wiring for PG (encoder) signal lines, and keep them separate from powerlines.Use shielded, twisted-pair wires for pulse inputs and pulse output monitor wires, and connect the shield to theshield connection terminal.Wire Sizes (Same for All Models)Terminal wire sizes are shown in Table 2.19.Straight Solderless Terminals for Control Circuit TerminalsWe recommend using straight solderless terminal on signal lines to simplify wiring and improve reliability.Refer to Table 2.10 Straight Solderless Terminal Sizes for specifications.Closed-loop Connector Sizes and Tightening TorqueThe closed-loop connectors and tightening torques for various wire sizes are shown in Table 2.20.Wiring Method and PrecautionsThe wiring method is the same as the one used for straight solderless terminals. Refer to page 2-24. Observethe following precautions when wiring.• Separate the control signal lines for the PG Speed Control Board from main circuit lines and power lines.• Connect the shield when connecting to a PG. The shield must be connected to prevent operational errorscaused by noise. Also, do not use any lines that are more than 100 m long. Refer to Fig 2.23 for details onconnecting 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.Table 2.19 Wire SizesTerminal TerminalScrews Wire Thickness (mm2 ) Wire TypePulse generator power supplyPulse input terminalPulse monitor output terminal- Stranded wire: 0.5 to 1.25Single wire: 0.5 to 1.25• Shielded, twisted-pair wire• Shielded, polyethylene-covered, vinylsheath cable(KPEV-S by Hitachi Electric Wire orequivalent)Shield connection terminal M3.5 0.5 to 2Table 2.20 Closed-loop Connectors and Tightening TorquesWire Thickness [mm2] TerminalScrews Crimp Terminal Size Tightening Torque (N • m)0.5M3.51.25 - 3.50.80.75 1.25 - 3.51.25 1.25 - 3.52 2 - 3.5
