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Design
H Wiring Frequency Reference Input Terminals
If frequency references are input using a D/A Unit (digital-to-analog converter) or external power supply,
wire the frequency reference input terminals (FR and FC) as described below.
D Wires to be Used
Always use twisted-pair shielded wires to prevent malfunctions due to noise.
Wire type
Single wire
Stranded wire
D Wiring Method
• The wiring procedure is the same as for sequence input/output terminals, described previously.
• Always separate the cables from the main circuit cables and other power cables.
• Connect the shield to the ground terminal of the Inverter. Do not connect to the controller.
• Insulate the shield with tape to prevent it from coming into contact with other signal lines and devices.
H Tightening Torque of Control Circuit Terminals
Tighten the control circuit terminals to the torque of 0.5 N S m which is the same torque as for the M3
screws.
Note 1. Applying a torque of greater than 0.5 N S m may damage the terminal block.
Note 2. If the tightening torque is insufficient, wires may be disconnected.
H Selection of Frequency Reference or Sequential Input
Caution
Do not touch the terminals of the Inverter within one minute after the Inverter is
!
turned off, otherwise an electric shock may be received.
Mounting or Dismounting the Digital Operator
1. To dismount the Digital Operator, insert a flat-blade screwdriver into the groove on the bottom of the
Digital Operator and lift the Digital Operator.
2. After the connector is removed, hold the lower part of the Digital Operator and slide the Digital Oper-
ator downwards.
Wire size
2
0.5 to 1.25 mm
2
0.5 to 1.25 mm
Wire to be used
Polyethylene-insulated cable for instrumentation (with
shield)
Chapter 3
3-21
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